Dr.(Mrs.) UMUDI ESE QUEEN
Publication Title Assessment of Polynuclear Aromatic Hydrocarbon in Marine Sediments Delta State, Southern Nigeria
Publication Type journal
Publisher Journal of Water Resources and Ocean Science
Publication Authors Umudi Ese Queen1, *, Umudi Ogheneyoma Peter2
Year Published 2022-04-04
Abstract Sediments from different zones in southern Nigeria were analyzed for the composition of their Polynuclear aromatic
hydrocarbon (PAHs). The purpose of this study was to provide information on the presence of PAHs distribution in these
sediments for managing waste environment and preserving the health of aquaculture and humans. This was done for 16 PAHS
collected from Warri (PC) petrochemicals, Burutu (FS) Finishing, Bomadi (FA) farming and Omasuomar. (CN) – Natural field. A
mixture of acetone / dichloromethane / n-hexane was used for the soxhlet extraction of PAHS from the sediment samples. This
was done using gas chromatography –mass spectrometry. The concentrations of E16PAH Varied from 0.00-2. 411, 0.00-0.848,
000-1.695, and 0.00-0.717 ?glg for sediments from these zones respectively. The benzo (a) pyrene (BaA) concentration in all
samples were below the stated limit of 0.7 ?gil for surface and sediment. Since it is an index for the contamination of PAHS.
There is need for caution in the discharge of waste, use of pesticides and herbicides since sediment is the final sink before transfer
in the food chain. The sources indicated PAHs originated from liquid fossil fuel burning, combustion of wood, biomass and high
temperature processes and pyrogenic sources. Therefore, attention should be paid on marine ecosystem by authorities.
Publication Title Evaluation of Koalin as Adsorbent for Chloride Reduction in Seawater from Forcados/Ogulagha Axis of Southwest Delta State, Nigeria.
Publication Type journal
Publisher Journal of Applied Sciences and Environmental Management
Paper Link https://dx.doi.org/10.4314/jasem.v26i2.10
Publication Authors Umudi, E.Q., Adaikpo, E. Obukohwo, I.E., Igbogbor, J. and Egheneji, A.C
Year Published 2022-02-02
Abstract This paper evaluates the use of three Nigerian clay types Otorho (OT, Abbi (BB) and Umutu (UM) as adsorbent for the reduction of chlorine in seawater from (Forcados/Ogulagha aix in Southwest Delta State using XRD X ray diffraction and Atomic Absorption Spectrophotometer. The alumino silicate nature of the clays was confirmed by the presence of SiO2 and Al2O3 and the presence of other elements (Na, K, Ca, Mg, Fe and Ti) in trace quantities. Percolation rate studies showed that clay UN had the lowest while OT had the highest. Clays fortified with stone pebbles in ratios 1:3 in columns in one flow-through and three flow troughs were used in different arrangements. Fortified clay (UM) gave the highest percentage reduction of 99.9%, BB clay 98.0% and OT clay 99.2%. The results showed that clay UM removed >99% of chloride.
Publication Title Nutritive Values of the Leaves of Crescentia Cujete (Ugbuba)
Publication Type journal
Publisher International Journal of Chemistry; Vol. 11, No. 2; 2019
Publication Authors Umudi E. Queen
Year Published 2019-09-09
Abstract Mineral and proximate analysis of Crescentia Cujete (Ugbugba) leaves were examined using the methods
recommended by Association of Official Analytical Chemist (AOAC). The leaves contained 51.00+1.05% moisture,
2.30+0.2% ash, crude protein 51.00+0.43%, crude lipid 1.90+0.08%, crude fibre 4.00+0.12%, carbohydrates
40.40+0.02%. The minerals ranges from mg/g dry weight K(30.02 + 0.03), Na (12.10+0.32), Ca (60.00+0.01). Mg
(361.42+0.01), P(14.19 +0.42), Mn (6.32 + 1.01), Fe (2.43+0.01), Cu (13.04+0.10), Zn (1.20+0.43), Na/K (0.40) and
Ca/P (2.14), K, Mg, Ca and Fe were found in significant concentrations. The findings showed that Crescentia Cujete
leaves are source of nutrients for edible purpose, a good Na/K ratio for lowering blood pressure.
Publication Title Fortified Clays in Seawater Desalination
Publication Type journal
Publisher Journal of Chemical Society of Nigeria
Publication Authors E.Q. Umudi and K.J Awatefe
Year Published 2018-10-12
Abstract
Publication Title Analysis of produce water from Ebedei flow plant station, Delta State
Publication Type journal
Publisher Journal of Chemical Society of Nigeria
Paper Link https://doi.org/10.46602/jcsn.v46i2.600
Publication Authors E.Q. Umudi and K.J Awatefe and J. Igborgbor
Year Published 2021-03-30
Abstract Produce water from Ebedei flow station (Delta State) at three points was analysed. Discharged point (A), midstream (B) and downstream (C) were a mile apart. The metal concentration of iron, zinc, cadmium, chromium, nickel, lead and manganese were carried out using standard methods. Lead levels at discharged point and down stream were higher than World Health Organization (WHO) standard limits. The polynuclear Aromatic hydrocarbon were determined using high performance liquid chromatography (HPLC). The total PAHs of sample (A) was 3.63ppm, (B) 52.05 and (C) 59.50 ppm respectively. The pH were within WHO limits of 8.10 and 8.20, conductivity in μs/cm was 20.10 and28.10 within acceptable range. Chloride was between 8, 130.00ppm and 22, 131.53 ppm higher than WHO and effluent discharge limits, while turbidity was between 46ppm-60ppm which was also higher. Hence there is need for holistic monitoring and remediation of produce water in the environment.
Publication Title Surface Water Treatment using Rhasphiastylic Beninesis
Publication Type journal
Publisher
Paper Link www.iiardjournals.org
Publication Authors E.Q. Umudi, K.J Awatefe and T. Emefiele
Year Published 2018-10-06
Abstract Rhaspiastylic barninesis roots were harvested form River Road, Abraka Delta State, Nigeria.
It was sun dried and grinds mechanically; methanol extracted that used for IR
spectrophotometric determination. Then used for treating surface water using 5 and 10 hours
constant time. The raw samples treatment showed elevated pollution characteristic but after
they were found suitable according to Standard Organization of Nigeria (SON). TS DS, SS,
BOD, COD TkN, Total bacterial were reduced between 87.00 – 99.00%. The parameters
were examined in accordance to Standard Method APHA from IR analysis – it contains
primary esters. Therefore, it is coagulated which carry positive charges to mark it bind with
negative charged participles (Pollutants, bacteria etc), it also adsorption process acting of
microbes bacteria through inhibition, enzymes inhibition. Rhaspiastylic beninses is low-cost,
energy consuming and green technology, water treatment for people with access to potable
water.
Publication Title PHYTOCHEMICAL AND ELEMENTAL ANALYSES OF Pyrenchantha staudtii Engle (Icacinaceae) AS BLOOD CLOTTING AGENT
Publication Type journal
Publisher Centre for Promotion of Educational and Scientific Research
Publication Authors E.Q. Umudi
Year Published 2020-03-23
Abstract Analysis of n-Hexane extracts of the leaves of pyrenachantha staudii Engl. (Icacinaceae) showed the presence of alkaloids, glycosides, tannins, and proteins. Atomic Absorption Spectroscopic Analysis of the leaves extract revealed the presence of magnesium. 270.01mg/100g; potassium 25.73mg/100g; calcium 10.20mg/100g; copper 5.30mg/100g and Iron 2.10-mg/100g while maganses 0.90mg/100g and zinc 0.02mg/100g were found in trace quantitites. The spectrochemcal analysis showed strong peaks at 300nm and 410nmfor the ultraviolet/ visible spectroscopy corresponding to absorbance of 0.192 and 0.288, while the infrared spectrum showed strong peaks at 1700cm-1, 2910cm-1, 1350cm -1 1450cm-1 and 1230 -1 respectively. Blood clothing time was monitored with the sample extract and without the sample. It showed good improvement in clothing time with respect to blood containing the samples extract.
Publication Title Chemistry Entrepreneurship for Job and Wealth Creation
Publication Type journal
Publisher IIARD International Journal of Economics and Business Management
Paper Link www.iiardpub.org
Publication Authors E.Q. Umudi
Year Published 2017-05-12
Abstract Chemistry rule the world, it therefore offers various business avenue for job and wealth
creation skills both technical and managerial to commercialize their innovations for profit
making, creating jobs for others and impacting the economy positively. Entrepreneurship
chemistry involves products that are marketable for financial benefit. Chemistry can now go
beyond academic publications to patenting and commercializing of their products. This paper
calls for paraglism shift in chemistry which not only end in academic journal but marketable
products and encouraging scientist (chemists) to make commercialization their research
goals form conceptualizating stage till the final stage.
Publication Title THE USE OF CLAYS IN WASTEWATER TREATMENT
Publication Type journal
Publisher Journal of Medical and Applied Bioscience
Paper Link http://www.cenresinpub.org/
Publication Authors E.Q. Umudi
Year Published 2012-09-23
Abstract Two Nigerian clays were studied using Atomic Absorption Spectrophotometer and X-ray
diffractometer. They were coded OT and BB obtained from Delta State, Nigeria.
Mineralogical analysis revealed the presence of kaolinite in the two clays. Illite and Quartz
in OT, smectite illite, mixed layer and Quartz in BB. Pebble:Clay ratio of 1:2 was adopted
and percolation rate studies showed that BB had lower rate than OT. One and three flow
through methods were adopted. This was used in treating effluent from the wood
factory. 3 flow through gave outstanding performance on the pollution characteristic
measured for they were below WHO standard. This showed that clays have high
potentials for pollutants removal.
Publication Title Mineral Composition of Edible Clays from the Ozanagogo, Delta State, Nigeria
Publication Type journal
Publisher International Journal of Chemistry and Chemical Processes
Paper Link www.iiardjournals.org
Publication Authors E.Q. Umudi
Year Published 2017-05-09
Abstract Edible clays from Ozonagogo were analysed for mineral composition these study is aimed at
identifying, the mineral nutrient present in edible clay for consumption. Sample of clays were
obtained from Ozonogo, Dleta State, grounded and sieve through 5mm stainless sieved,
dried, baked into spherical units. The samples were then tested for various mineral
compositions, according to standard method recommended by Association of Official
Analytical Chemist (AOAC). The results showed that iron is the most predominant mineral
with content ratio of (418 + 0.02 – 623 + 0.10 mg/100g), sodium (2.00 + 0.00 – 3.70 + 0.01
mg/100g), Potassium (20.65 + 0.01 – 43.01 + 0.02), calcium (2.7 + 0.02 – 5.30 + 0.02
mg/100g) Magnesium (40.00 + 63.05 mg/100g), phosphorus (3.00 + 0.00 – 3.37 – 0.02
mg/100), copper (1.10 + 0.15 – 1.87 + 10mg/100g) Zinc 2.01 – 21.74 mg/100) were found in
significant concentration in the edible clays. They are potential source of nutrients.
Publication Title ANALYSIS OF PRODUCED WATER FROM FOUR COMMUNITIES IN DELTA STATE (NIGER DELTA), NIGERIA
Publication Type journal
Publisher Journal of Physical Sciences and Innovation
Publication Authors E.Q. Umudi
Year Published 2011-03-05
Abstract Produced water from four Delta State Community flow-stations [Ogulaha (A), Sokobolor (B), Iyokiri (C) and Okirika (D)] 10 miles apart were analyzed. They contain 35.26ppm polycyclic aromatic hydrocarbon for A, 4.57ppm for B, 60.68 for (C) and 53.00 for (D). pH values were 8.10 for A, 8.20 for B, 8.10 for C and 8.10 for D, tuibidity values were 63NTU for A, 51 for B, 47 for C and 66 for D. BOD and COD were (310.00, 121.00, 201.31 and 231.21)ppm and (810.00, 710.00, 913.00 and 810.00) ppm respectively for samples A, B, C, and D. Total organic carbon (mg/l) was 30.00, 154.00, 23.00 and 240.00 for the samples A, B, C and D. The metal concentrations of iron, zinc, nickel, cadmium and lead were higher than accepted limits of World Health Organisation (WHO) and National Environmental Standard and Regulation Enforcement Agency (NESREA) while copper, chromium and manganese were within acceptable limits.
Publication Title Evaluation of Kaolin as Adsorbent for Chlorine Reduction in Seawater from Forcados/Ogulagha Axis of Southwest Delta State, Nigeria
Publication Type journal
Publisher J. Appl. Sci. Environ. Manage.
Paper Link https://dx.doi.org/10.4314/jasem.v26i2.10
Publication Authors E.Q. Umudi; ADAIKPO, E; OBUKOHWO, IE; IGBORGBOR, J; EGHENEJI, A
Year Published 2022-02-19
Abstract This paper evaluates the use of three Nigerian clay types Otorho (OT, Abbi (BB) and Umutu
(UM) as adsorbent for the reduction of chlorine in seawater from (Forcados/Ogulagha aix in Southwest Delta State
using XRD X ray diffraction and Atomic Absorption Spectrophotometer. The alumino silicate nature of the clays
was confirmed by the presence of SiO2 and Al2O3 and the presence of other elements (Na, K, Ca, Mg, Fe and Ti) in
trace quantities. Percolation rate studies showed that clay UN had the lowest while OT had the highest. Clays
fortified with stone pebbles in ratios 1:3 in columns in one flow-through and three flow troughs were used in different
arrangements. Fortified clay (UM) gave the highest percentage reduction of 99.9%, BB clay 98.0% and OT clay
99.2%. The results showed that clay UM removed >99% of chloride.
Publication Title Leachate Treatment Using Clay/Stone Filters
Publication Type journal
Publisher J. Chem Soc. Nigeria
Publication Authors E.Q. Umudi and K.J Awatefe
Year Published 2018-01-31
Abstract Leachate from sanitary landfill from Agbor in Ika South Local Government Area of Delta State, Nigeria was analysed using its physiochemical characteristics. Cationexchange capacity percolation rate studies and mineralogical analysis of clays collected from Amai and Otorho in Ukwuani Local Government Area of Delta State were coded AM and OT, using x-ray diffrctometer were tested on the leachate (Raw and after treatment). The clays were mixed in ratio 1:4 (pebbles:clay) using one and three flow through columns. Clays showed the presence of kaolin, quartz, illite and mixed layer. Raw samples have BOD 80.60 -210.00 mg/dm3COD 842.00 -933.20 mg/dm3, NH3+-N 0.80 -11.20 mg/dm3, TSS 61.20 -70.20 mg/dm3, TDS 510.00-734.00 mg/dm3, Ca 0.01-16.00 mg/dm3and Salinity 0.90 -2.10%, percolation rate studies 2.94 x 10-7–3.76 x 10-7, cation exchange capacity 4-9 cmol/kg. The values were above WHO and NESREA standards, but after treatment,BOD values were 3.00 –6.20 mg/dm3, COD 15.00 –18.00 mg/dm3, NH3+ -N 0.32 –0.42 COD 15.00 –18.00 mg/dm3, TSS 10.10 –22.50 mg/dm3, Ca 10 -12 mg/dm3, Salinity 0.08 –0.31 %. This shows that clay/stone filters are efficient, low cost purifying system and environmentally friendly, they fall within acceptable limits.
Publication Title Phytochemical and Elemental Analysis of Trichosanthes cucumerina (Snake Gourd)
Publication Type journal
Publisher CARD International Journal of Science and Advanced Innovative Research (IJSAIR)
Publication Authors E.Q. Umudi, K.J Awatefe and T. Emefiele
Year Published 2017-12-19
Abstract Psychochemical and elemental analysis of Trichosanthes cucumerina seed was extracted by soxhlet using n-hexane, it shows the presence of alkaloid, glucosides, tannis and glycoside. It was characterized by atomic Absorption Spectrophotometer and revealed the presence of magnesium 280.00mg/100g, Potassium 240.00 mg/100g, calcium 15.20 mg/100g, copper 8.2 mg/100g, iron 4.2 mg/100g and zinc 0.05 mg/100g, the Infra-Red Spectroscopic Analysis revealed strong bonds at 1643 and 3012 cm-1 strongly which are C = C and C – H stretching of olefins. This indicates that the seeds are useful medicinally and are good antioxidants.
Publication Title Porous clays as low cost adsorbent to reduce chloride in seawater
Publication Type journal
Publisher International Research Journals
Publication Authors E.Q. Umudi
Year Published 2021-11-25
Abstract The Ocean water from the Atlantic Ocean (Forcados/Ogulagha) axis which is in Southwest of Delta State, Nigeria, provides for various uses. High level of chloride can cause pollution level in the environment. In man, disturbance in blood chloride level is related to the kidney. It is an important electrolyte, along with sodium are responsible for osmotic pressure and acid base balance it help keep the fluid inside and outside of our body in balance, so it needs to be checked and balanced. Ocean water from Ogulagha axis was analysed using standard methods and three Nigeria clay types coded Otorho (OT), Abbi (BB) and Umutu (UM) were used as adsorbents using XRD X ray diffraction. Clays fortified with stone pebbles in ration 1:3 in columns in one flow-through and three flow troughs were used in different arrangements. Fortified clay (UM) gave the highest percentage reduction of 99.9%, BB clay 98.0% and OT clay 99.2%. The results showed that clay UM removed >99% of chloride.
Publication Title POWDERED ACTIVATED CARBON FROM MANGO SEED (Mangifera Indica) FROM UPTAKE OF ORGANIC COMPOUNDS FROM AQUEOUS MEDIA
Publication Type journal
Publisher Journal of Biological Science and Bioconservation
Publication Authors E.Q. Umudi and Ukpebor, E.J
Year Published 2012-09-23
Abstract Powdered activated carbon (PAC) was prepared from endocarp of mango seed (Mangifera
indica) by steeping air-dried samples in phosphoric acid 45% v/v and ammonium chloride
4% w/v for 12 hours followed by pyrolysis at 3500
C for 3 hours. The activated carbon
obtained in each case was washed free of acid/base and characterised in terms of bulk
density surface area (iodine number) and total surface charge. The effectiveness of
activated carbon prepared from the endocarp of mango seed in removing the organic
compound from aqueous solution was determined from Chemical Oxygen Demand
measurement before and after treatment with the activated carbon. The results obtained
indicate potential for the utilization of endocarp of mango seeds for the remediation of
wastewater.
Publication Title CO-ORDINATION CHEMISTRY
Publication Type others
Publisher
Publication Authors E.Q. Umudi (Ph.D).
Year Published 2023-10-10
Abstract
Publication Title A Comprehensive Review on Limitations and Strategies for Enhancing Remote Teaching and Learning in Academic System
Publication Type journal
Publisher FUPRE Journal of Scientific and Industrial Research
Publication Authors MUGHELE, S.E., OGALA, J.O., OKUYADE, O.S., UMUDI, E.Q.
Year Published 2024-05-23
Abstract Covid-19 was declared a global pandemic in 2019. The most practical method for continuing teaching and learning, particularly at Academic institutions, is to use Remote teaching and learning. There has been a significant shift from face-to-face teaching and learning to a fully online teaching and learning environment.
Academic institutions must ensure that their curricula are consolidated and adjusted to accommodate online teaching and learning. Educators must adapt to new and creative techniques to engage students during Remote teaching and learning to meet the new normal in teaching and learning. This paper reviews the literature on 1) the obstacles that Academic institution educators encounter in Remote teaching and learning and 2) the techniques they employed to address those challenges during the Covid-19 outbreak.
Publication Title Clay - Based Approach for Nitrate Reduction in Orogodo River Southern Nigeria
Publication Type Published Research
Publisher Journal of Scientometrics and Innovations
Publication Authors Umudi, E.Q., Igere O.F., Adu M.E., Umudi, O.P. and Obukowho I.E.
Year Published 2023-10-01
Abstract Studies on Nigeria clays using X- diffractometer and Atomic Absorption Spectrometer in Reducing of Nitrates from Orogodo River was conducted. Clays were coded UD and AU and Saponite, Montmoriillorite, Chloride, illite, mixed layer, Kaolinite and Quartz was found in UD AU chloride, Illite, Kaolinite, Quartz and Hematite were present in AU. AG has Quartz mixed layer, illite, chloride, saponite, Kaoline and Hematite they were alluminosilate clays with Si02 and Al203 present. The minimum efficiency removal of nitrate removal was (35% -44.90%) using batch and continuous
method was (88.00%-93.41%) - other parameters were measured (pH, Temperature) Dissolved Oxygen (DO), they were also reduced using residence time. There was significant reduction in the pollution parameters using performance efficiency of ration (1:2) which gave optimum reduction properties with the permissible limit for crop production (irrigation). The study showed that clay possesses potential for removing nitrates from rivers using local clays which is readily available and environmentally friendly.
Publication Title Comparative Study on Polyvinyl and Epoxy Polyamide (Polymers) Resins as Corrosion Resistance Coating on Low Carbon Steel
Publication Type Published Research
Publisher International Journal of Science and Engineering Invention
Paper Link 10.23958/ijsei/vol04-i10/95
Publication Authors K.J. Awatefe, C.A. Idibie, E.Q. Umudi
Year Published 2018-10-01
Abstract Two commonly applied corrosion resistance coatings (Polyvinyl and Epoxy Polyamide resins) in Rivers and Bayelsa areas of Nigeria, have been compared on performance properties. The coatings were applied on low Carbon Steel samples that were cut to specific sizes. These
prepared samples were subjected to varying conditions of pH, temperatures and exposure to definite time periods. The corrosion rates in ML per year (MPY) were then analyzed. The results of the corresponding corrosion rate in MPY obtained at PH 2,3,4,5, and 6, for epoxy polyamide resin, were 0.566, 0.553, 0.379, 0.354 and 0.322 respectively, and that for polyvinyl resin were 0.334, 0.326, 0.314, 0.288 and 0.277 respectively. The effect of temperature at 30°C, 4°C, 50°C, 60°C and 70°C were compared and corresponding corrosion rate in MP
obtained for epoxy polyamide were 0.158, 0.288, 0.477, 0.655 and 0.810 respectively, while that for polyvinyl resin gave values of 0.122, 0.21, 0.411, 0.552 and 0.651 respectively. The time exposure in hours of 692, 1008, 1344, 1680 and 2016 for the test steel samples applied with epoxy polyamide resin coating gave a corresponding corrosion values in MPY of 0.012, 0.016, 0.030, 0.043 and 0.055 respectively, and that for
polyvinyl resin coating were 0.002, 0.009, 0.020, 0.034 and 0.044 respectively. The results obtained showed that polyvinyl resin coating have better performance properties over epoxy polyamide resin. Therefore polyvinyl resin coating can be recommended as a good corrosion
resistance coating on low carbon steel pipes used in crude oil exploration in Petroleum industries.
Publication Title DIAGNOSTIC RATIOS OF POLYAROMATIC HYDROCARBONS FOR THE IDENTIFICATION OF POLLUTION SOURCES IN CLAMS FROM OKWAGBE, DELTA STATE, NIGERIA
Publication Type Published Research
Publisher Science World Journal
Paper Link https://dx.doi.org/10.4314/swj.v19i2.30
Publication Authors Umudi E.Q., Umudi O.P., Igere O.F. and Diakparomre O
Year Published 2024-07-01
Abstract Polyaromatic hydrocarbons (PAHs) are pollutants found in the environment. Their sources are anthropogenic and natural. Since clams are filter feeders, they can accumulate (PAHs) in their tissues providing vital tool for pollution source monitoring. This study investigated different pollution sources using diagnostic ratio of PAHs. Clams were collected from Okwagbe River, Delta State, Nigeria and analyzed for their polyaromatic hydrocarbon (PAH)
contents. The sixteen (16) priority PAHs, including: 1-methylnaphthalene and 2-methylnaphthalene were determined in flesh and shells using gas chromatography. A mixture of
acetone/dichloromethane/n-hexane was used for the Soxhlet extraction. The concentration of mean total PAHs was 2.495 ?g/kg for flesh and 2.156 ?g/kg for shell. The benzo(a)pyrene (B[a]P) of flesh was 0.210 ?g/kg and 0.312 ?g/kg for shells. These valves did
not exceed the permissible limit of 6.0 ?g/kg for benzo(a)pyrene and 35.0 ?g/kg for PAHs. The isomeric ratio was used to find the sources of PAHs in flesh and shells. It showed the sources were petrogenic, pyrogenic and wood burning. Clams can be a tool for tracking pollution source identification and improve understanding of human activities on ecosystems.
Publication Title Enhancing Nitrate Reduction in Palm Oil Factory Wastewater Using Cost Effective Activated Natural Clay Adsorbent
Publication Type Published Research
Publisher Journal of Computing, Science &Technology
Paper Link https://focjournal.unidel.edu.ng
Publication Authors Umudi Ese Queen, Umudi O. Peter, & Igere Okeoghene Festus
Year Published 2024-04-11
Abstract High level of nitrates from palm oil mill wastewater causes pollution in the environment. The reduction in its
content was done using natural and activated Kaolin clay. The aim of this research is to use local abundant
and low cost adsorbent in the reduction of nitrates. Mineral logical composition of clay was done using X-ray diffractometer, standard methods America Public Health Association (APHA) standard was used UV-Visible spectrophotometer with a percolating media containing clay stone in ratio 3:1. The nitrate level in palm oil effluent 55.70mg/L after treatment it was reduced to 5.31mg/L for natural Kaolin and 3.4mg/L for activated kaolin. Based on World Health Organization (WHO) standard it is high enough to cause pollution. It was shown that kaolin has the capacity to reduce nitrates from palm oil mill wastewater when activated kaolin has greater capacity for nitrate removal than natural kaolin.
Publication Title QUALITY ASSESSMENT OF KAOLIN CLAY FROM OZANAGOGO, UMUTU AND OTORHO, DELTA STATE, NIGERIA
Publication Type journal
Publisher Journal of Sciences and Multidisciplinary Research
Publication Authors Ese Queen Umudi1 and Toyin Emefiele
Year Published 2017-01-01
Abstract The composition of kaolin clay collected from Ozanagogo, Umutu and Otorho in Delta State were studied for their purity, and their mineralogical composition using X-ray diffractometer and Atomic Absorption Spectrophotometer. The elemental compositions determined were CaO, K2O, MgO, Na2O, Fe2O3, Al2O3, SiO2 and structural water, while heamatite was a major impurity. The CaO was the major tracer and was within acceptable limits for a variety of uses. Mineralogical analysis revealed the presence of kaolinite and
quartz in all CaO ranges from clay types in different amount 10.31% in Otorho to 30.21 in Ozanagogo Al2O3 and SiO2 which were minor tracer element were 29.62%- 39.90% and 30-17- 42.37%. The highest being Ozanagogo clay. The kaolin quality obtained from Ozanagogo was within the limits accepted by British
Industrial Standards, (BIS) and American Society for Testing Materials (ASTM) standard specification for use in manufacturing of many products.
Publication Title Low cost adsorbent to reduce pollutants in Owa-Adlidinma, influence of oil flow station Southern Nigeria
Publication Type journal
Publisher UNIZIK Journal of Engineering and Applied Sciences
Publication Authors Umudi, E.Q., & Umudi, O.P.
Year Published 2024-03-01
Abstract The capacity of kaolin clays from UR (Udophori) OZ (Ozanagogo) and AU (Auchi) for removal of pollutants from
wastewater and run-off at Owa-Alidinma. X-ray diffractometer, ultraviolet/visible spectrophotometer and Atomic Absorption spectrophotometer were used for analysis of clays and pollutant. Percolation rate studies and performance efficiency was carried out to choose the best combination ratio of pebble/clay ratio (1:3) was found suitable using batch and continuous columns treatment methods using standard methods of analysis Oz clay type gave the best result from the four continuous treatment columns. The batch and continuous treatment were tried. Oz clay type gave the best result for the
reduction of pollutants using the four continuous columns, for batch treatment turbidity (5.16-17.67%) Biological Oxygen Demand (BOD) (4.11-14.93%), Chemical Oxygen Demand (COD) (7.16-15.75%), phosphorous (5.33-15.78%), Nitrates (4.00-9.70%), Iron (Fe) (21.00-26.00%), Chromium (Cr) (30.00-16.12%), Copper (Cu) (15.00-24.49%) and Zinc (Zn) (6.20-13.40%) reduction, while for continuous column treatment, BOD (89.73-95.54%), COD (86.50-90.35%), phosphate (77.10-84.82%), Fe (86.50-91.00%), Cr and Zn not detected, Cu (94.78-96.10%) respectively. Final effluent characteristics were found to be comparable with World Health O,rganisation (WHO), Standard Organisation Nigeria (SON) and National Environmental Standard and Regulation Enforcement Agency (NESREA) standards for various
purposes. This method is low energy consuming, easy to manipulate and can alleviate the problem of fresh water shortage in these areas and access to potable water.
Publication Title IMPROVING FISH POND WATER QUALITY THROUGH CLAY-FILTRATION AND BIOLOGICAL REATMENT METHOD
Publication Type journal
Publisher FUDMA Journal of Sciences
Paper Link https://doi.org/10.33003/fjs-2024-0804-2601
Publication Authors Umudi, E.Q., Umudi, O.P., Asabor, B.M. and Igere, O.F.
Year Published 2024-08-01
Abstract This study sought to evaluate the physical, chemical and bacterial parameters of fish pond wastewater after treatment using clay filtration and biological treatment methods. Appropriate parameters were analyzed in other to determine the quality of the wastewater before and after treatment with clay, using standard methods. The clay sample used, which was obtained from Ossiomo Edo State was also analyzed by measuring its mineralogical and geochemical composition using x-ray diffractometer and atomic absorption
spectrophotometer respectively. The clay was found to be composed mainly of kaolinite and alumino-silicates. From the result obtained from the treatment of the fish pond wastewater showed significant percentage reduction in the relevant pollution parameters (electrical conductivity - 54.39% reduction, biochemical oxygen demand - 95.94% reduction, total dissolved solids - 40.25% reduction, chloride - 89.40% reduction, ammonia nitrogen - 92.27% reduction, phosphate - 23.24% reduction, turbidity 94.11% reduction, total bacteria count - 92.57% reduction). The values obtained after treatment were lower than WHO and FEPA limit values and favoured quality production of fish and other non-potable usage, indicating that clay filtration is a cost-effective and eco-friendly method which can be employed in the treatment of fish pond wastewater.
Publication Title INVESTIGATION OF THE EFFECTIVENESS OF FENTON OXIDATION FOR REMEDIATING BALLAST WATER CONTAMINATED SOIL
Publication Type journal
Publisher Science World Journal
Paper Link https://dx.doi.org/10.4314/swj.v19i2.32
Publication Authors Umudi, E.Q., & Umudi, O.P.
Year Published 2024-08-04
Abstract Ballast water released from ships have been known to contaminate
water bodies and soils and introduce invasive species into the immediate environment, if not properly treated or if not treated at all. There is therefore a need to design several strategies in
preventing and/or ameliorating this and to establish the effectiveness of each strategy. This paper therefore investigates the effectiveness of the use of fenton oxidation in the remediation of ballast water contaminated soil. Soil samples were collected from Otorho Abraka and stimulated with ballast water in a
laboratory scale experiment. The soil samples were mixed with solutions containing hydrogen peroxide and ferrous ions at varying concentrations. The reaction proceeded for twelve (12) weeks, then the samples were analyzed for removal of contaminants. There was pH reduction from 5.10 to 4.00, but increase in the total organic carbon from 2.80% to 3.40%. Total phosphorus was between 7.20 - 453mg/l, while total nitrogen ranged from 1.70mg/l
to 2.10mg/l. There was also an increase in heavy metal content. Soil texture was slightly affected with Fenton reagent. The result showed a significant reduction in the concentration of pollutants with time, since more hydroxyl radicals reacted with the contaminants. Its efficiency and kinetics was established as first-order reaction.
Publication Title Evaluating Ballast Water Quality at Forcados Terminal, Southern Delta, Nigeria
Publication Type journal
Publisher Faculty of Natural and Applied Sciences Journal of Basic and Environmental Research
Paper Link www.fnasjournals.com
Publication Authors Umudi, E.Q., & Umudi, O.P.
Year Published 2024-03-01
Abstract Forcados river terminal is deteriorated by anthropogenic and congenital exercises. The aim of this preliminary study is to assess ballast water through some pollution parameters as pH, electrical conductivity (EC), dissolved oxygen (DO), total alkalinity (TA), chlorine (Cl), nitrates (N), phosphate (P), turbidity (TB), lead (Pb), zinc (Zn), total dissolved solids
(TDS), chromium (Cr), bacteria count (BC) and polynuclear aromatic hydrocarbons (PAHs). Maritime transport plays a major role due to its cost effectiveness and reliability. Ship-based marine pollution has a serious level for the environment, its biodiversity and economy. Results from the analysis showed that some parameters of ballast water from ships in Forcados (Chloride: 3.40-5.15 mg/l, phosphorus: 2.42-4.42 mg/l, turbidity: 18.70-23.51 mg/l, total dissolved solids: 270.31-341.21 mg/l) are not suitable for aquatic fauna. Hence, some special appraisal is needed. International Maritime Organization (IMO) regulations should be reviewed related to ballast water and local authorities should be educated on them before it is discharged into the river.
Publication Title Evaluation of Physicochemical Properties and Heavy Metal Content of Domestic Wastewaters Treated With Clay-To-Stone Formulation from Urovie and Agbor in Delta State and Aba in Abia State, Nigeria
Publication Type journal
Publisher Journal of Applied Science and Environmental Management
Paper Link https://dx.doi.org/10.4314/jasem.v28i8.22
Publication Authors UMUDI, E.Q., UMUDI, O.P., IGERE, O.F.
Year Published 2024-08-05
Abstract Wastewater treatment processes eliminate contaminants before being discharged into the immediate environment. Therefore, the objective of this paper is to evaluate the physicochemical properties and
heavy metal content of the kitchen, toilet, bathroom and laundry wastewaters treated with clay-to-stone formulations from Urovie (UR) and Agbor (OT) in Delta State and Aba (AB) in Abia State, Nigeria using various standard methods. Mineralogical and geochemical composition revealed the clays as predominantly kaolin, smectite, illite,
mixed layer quartz and saponite. The presence of Al2O3 and SiO2 confirmed the hydrated aluminosilicate nature of the clays. An improvement of clay with small stones in the ratio 1:4 (clay to stone) employed in the treatment of the wastewater effluents reveals that pollution biomarkers were significantly altered after treatment using all three enhanced clay formulations (UR, AB and OT). Treatment of wastewater using enhanced clay formulation can
therefore be thought of as an effective wastewater purification system. It is a simple, low-energy consuming and cost-effective decentralized wastewater treatment system.
Publication Title Quantifying and Evaluating Heavy Metal Content Ballast Contaminated River in Nigeria Port Authority (NPA) Warri Delta State.
Publication Type journal
Publisher COOU Journal of Physical Sciences
Paper Link www.cjps.coou.edu.ng
Publication Authors UMUDI Ese Queen, UMUDI Ogheneyoma Peter, and IGERE Oke
Year Published 2024-01-01
Abstract The impacts of ballast water on the river and surrounding environment were investigated by measuring the concentration of heavy metals Co, Cd, Cu, Pb, Ni, Cr, and Fe (mg/g) in the sediment and water of the NPA river in the Nigeria Port Authority, Warri South Local Government Area. These metal concentrations fall between 0.06 and 1.70 mg/C in water and 0.04 and 4.62 mg/l in sediment, respectively. The concentration level of heavy metals in water follows the patterns Fe>Pb>Ni> and Cr>Cu>Co, whereas the sediments follow the patterns Fe>Pb>Cr>Cu>N>Co>. The Abraka River's non-ballast impacted water was used
to create the value that served as the baseline values. In order to manage and mitigate the risk associated with these contaminants, decision-making processes are aided by the presence of heavy metals in the water and sediment in ballast water. These elements also assist in establishing standards and guidelines that safeguard human health and preserve the ecological integrity of marine ecosystems.
Publication Title Carcinogenic and non-carcinogenic health risk assessment of heavy metals in the offal of animals from Felele Abattoir, Lokoja, Nigeria
Publication Type journal
Publisher Toxicology Reports
Paper Link https://doi.org/10.1016/j.toxrep.2024.101701
Publication Authors Jude Ehwevwerhere Emurotu, Olatayo Olawale, Ephriam Musa Dallatu, Tenimu Adogah Abubakar, Queen Ese Umudi, Godfrey Okechukwu Eneogwe, Anthony Atumeyi
Year Published 2024-07-24
Abstract The consumption of metal-contaminated offal of animals will affect the health of humans. Thus, the research determined the concentrations of heavy metals in the offal and muscle tissues of cows, goats, and ram slaughtered at the main abattoir in Lokoja, northcentral Nigeria. Furthermore, an evaluation was carried out to assess the potential health hazards faced by the indigenous population due to the consumption of heavy metals from
these animals. The mean concentrations of metals (Al, Cd, Cr, Ni, and Pb) in the kidney, liver, and muscle of cows, goats, and rams were determined using Inductively Coupled Plasma Optical Emission Spectrometry. Estimated daily intake of the metals, hazard quotient, hazard index, and cancer risk were calculated. All internal organs had Ni levels above the regulatory threshold limit. The average concentration of Pb in the muscle tissue and liver of the tested animals exceeded the permissible limits by the WHO. Similarly, the concentration of Cd in
the muscle tissues was above the Maximum Permissible Limit (MPL) of 0.05 mg kg? 1. Except for cow kidneys, all internal organs contain Cr levels below the MPL (1.0) limit. The THQ value for the metals was < 1> 1. The percentage contribution of Cd to the HI value was the highest. The observed sequence is Cd > Ni > Cr > Pb > Al. The results show that eating the offal and muscle under investigation has a carcinogenic effect.
Publication Title The Use of Earthclays in Water Purification
Publication Type conferenceproceeding
Publisher Nigerian Journal of Science and Environment
Publication Authors Umudi E.Q., Adaikpo E.O., Okoh B.E. and Awatefe K.J.
Year Published 2011-01-01
Abstract The geochemical and mineralogical analyses of clays obtained from Otor Edo (OT) and Abbi (BB) in Nigeria were studies using X-ray diffractometer and Atomic Absorption Spectrophotometer. The mineralogical analysis showed the clay mineral contents of OT s kaolinite and illite while BB contains kaolinite, smectite, illite and mixed layer. Geochemical analysis shows that the hydrated alumina silicate are associated with other elements like Fe, Na, Mg, Ca, Ti and K. During purification, earthclays fortified (i.e. pebble:clay = 1:2 w/w) gave optimum water purification. BB gave the lower perculation rate studies using 3 columns. The overall performance of clays in Brewery wastewater treatment was good. The percentage removal of total bacteria was 91% with BB giving a higher pollutant removal. The pH, total solid, dissolved oxygen and chemical oxygen demand were monitored for fourteen days and there way reduction. Clays BB and OT achieved complete removal of the metals. This is a simple, reliable low-cost, low energy consuming and technologically simple decentralized waste water purifying system.
Publication Title Treatment of Tannery Effluent from Sharada Industrial Estate in Kano, Nigeria with Porous Clays
Publication Type journal
Publisher Caliphate Journal of Science & Technology (CaJoST)
Paper Link https://dx.doi.org/10.4314/cajost.v6i3.6
Publication Authors Ese Q. Umudi, Ogheneyoma P. Umudi, Okeoghene F. Igere and Ovovwe Diakparomre
Year Published 2024-12-09
Abstract The tannery industry plays a significant role economically, but it negatively hampers the environment by elevating the concentration of pollutants during the tanning process. The geochemical and mineralogical properties of two Nigeria clay samples were studied by Atomic Absorption Spectrophotometer (AAS) and X-ray diffractometer respectively. Clay samples were obtained from Ozanagogo and Otor-Edo in Delta State, coded OZ and OT respectively. Column clay packed with pebbles in a ratio of 1:4 was used for the purification/removal of pollutants using batch method. Results revealed that the pH of the treated effluents increased from 3.7 to 6.9 and 8.2. Turbidity values reduced from 63.00
NTU to 0.2 NTU and 0.5 NTU, while COD values dropped from 877.00 mg/L to
2.71 mg/L and 15 mg/L, and BOD values decreased from 350.00 mg/L to 0.71 mg/L and 5.00 mg/L. A reduction in chloride levels from 2650.00 mg/L to 97 mg/L and 102.00 mg/L was also observed, while treatment of the effluents brought the bacterial count from 1.9x108 to nil, using both clay samples. The mineralogical study revealed that kaolinite was the most abundant clay mineral in both clay types, while hematite was the least abundant in both samples. This paper studied the use of locally sourced material (clays) in treating tannery
effluent, and compared the values of the treated effluent with WHO, SON and NESREA standards for drinking water. This study has shown that the porous clay method is an effective purification system using cost-effective, locally-sourced materials and a simple decentralized treatment method.
Publication Title Analysis of the Mineral Nutritional and Phytochemical Composition of Mistletoe Leaves (Loranthaceae)
Publication Type journal
Publisher Faculty of Natural and Applied Sciences Journal of Applied Chemical Science Research
Paper Link www.fnasjournals.com
Publication Authors Umudi, E.Q., Umudi, O.P., Diakparomre, O., Obiagwe, J., & Nwakwanogo, B.E.
Year Published 2024-09-01
Abstract Medicinal plant extracts have been used in different cultures, for treating ailments and managing health issues like inflammatory conditions, hypertension, diabetes mellitus, arthritis, epilepsy, etc. Extracts of mistletoe leaves were studied for their mineral, nutritional and phytochemical composition. The proximate analysis results reveal high
fibre content (11.1%) and low fat (3.2%) content, making it a good cholesterol-lowering agent. The mineral composition revealed that mistletoe leaves are nutritionally beneficial as they contain relatively high levels of
iron, calcium, potassium, manganese and magnesium, which all play important physiological and metabolic roles in the body. The Na/K and Ca/P ratios of 0.623 and 3.931 respectively are considered favourable, making the leaves nutritionally and physiologically important. The presence of tannins, saponins, flavonoids, steroids, resins
and alkaloids could be responsible for their use in traditional medicine. These findings therefore reveal that mistletoe leaves can be utilized as medicinal/curative agents in ameliorating health-related issues such as hypertension, cancer, arthritis and fertility-related ailments; as well as being nutritionally beneficial, if properly harnessed.
Publication Title Assessment of Selected Heavy Metals in Edible Palm Oil Sold in Ika Land, Delta State of Nigeria
Publication Type journal
Publisher Savanna Journal of Basic and Applied Sciences
Paper Link http://www.sjbas.com.ng
Publication Authors Adu, M.E, Ehiwario, B.C, Umudi, E.Q and Igere, O.F.
Year Published 2024-12-01
Abstract Food contamination has become a major health problem due to its adverse effects on the human body. Ika Land is known for the production and sales of palm oil. Eleven (11) samples of palm oil were randomly collected; ten (10) samples were collected from the point of sale and one (1) from the oil mill to serve as control. Oils were analyzed for heavy metals (lead, zinc, cadmium, nickel, and copper) using an atomic absorption spectrophotometer. Results showed that all samples contain zinc, an essential trace element with the highest value of 7.00mg/kg, while some samples contain copper (1.00mg/kg) and few contain cadmium (1.00mg/kg). There
was neither lead nor nickel detected in all the samples. It is therefore pertinent to conclude that some palm oil produced and sold in Ika land is safe for human consumption.
Publication Title Quantifying and Evaluating Heavy Metal Content Ballast Contaminated River in Nigeria Port Authority (NPA) Warri Delta State.
Publication Type journal
Publisher Chukwuemeka Odimegwu Ojukwu Journal of Physical Sciences,
Publication Authors Umudi Ese Queen, Umudi Ogheneyoma Peter, Igere Oke
Year Published 2024-05-20
Abstract
Publication Title Investigating the Characteristics of Atlantic Ocean by Standard Method at Ogulahai Delta State, Nigeria
Publication Type journal
Publisher Nigerian Journal of Science and Environment
Publication Authors Ese Umudi, Kehinde J. Awatefe, Okoh B. E, Odjighere M. O
Year Published 2011-12-03
Abstract
Publication Title Nitrate Levels in Freshwater of Delta State, Nigeria
Publication Type journal
Publisher Journal of Physical Science and Safety Studies
Publication Authors Umudi, E. Q
Year Published 2009-01-12
Abstract
Publication Title The Nutritional Composition of Mushroom (P. Erymgii).
Publication Type journal
Publisher African Journal of Physical Sciences
Paper Link www.africajournalseries.com
Publication Authors Umudi, E. Q
Year Published 2013-12-03
Abstract
Publication Title Metal Contamination of Soils Around Global System Mobile (GSM) Base-Station.
Publication Type journal
Publisher African Journal of Physical Sciences
Publication Authors Umudi, E. Q
Year Published 2010-12-06
Abstract
Publication Title Optical Properties of Aluminium-Doped Zinc Oxide Thin Films Synthesized via AACVD Using Nitrogen as a Carrier Gas
Publication Type journal
Publisher
Paper Link https://arxiv.org/abs/2502.03058
Publication Authors Kingsley Imoni-Ogbe, Onyekachukwu Mike Osiele, Vincent Akpoveta, Ese Umudi
Year Published 2025-02-05
Abstract This research combines AACVD technology with N? carrier gas to produce AZO thin films
while studying the structural and optical and morphological effects of Al doping at
concentrations ranging from 0% to 20%. The AACVD process took 400°C to deposit films onto
soda-lime glass surfaces before an annealing step at 450°C under nitrogen environment.
When utilizing nitrogen gas as carrier medium in X-ray Diffraction tests showed superior
crystalline structure through distinct powerful signals appearing in the (220), (311), and (222)
peaks. The films demonstrated smaller crystallite sizes and greater dislocation densities when the
Al doping concentration increased because this produced more lattice strain as well as structural
defects. The thickness of films obtained through profilometry increased slightly from undoped
ZnO at 102 nm to 115 nm for 20% Al-doped ZnO samples.
The UV absorbance of nitrogen-annealed films became stronger with peak intensities being more
pronounced at lower doping stages (5%). The bandgap energy of the produced films expanded
steadily when Al concentrations increased from undoped ZnO at 3.21 eV to 3.33 eV for ZnO
with 20% Al doping. This change matched the Burstein-Moss effect. Optoelectronic devices
benefit from the enhanced optical activity over broader wavelength ranges through the Al doping
rates exceeding 15% and up to 20% levels in these films.
The research reveals nitrogen carrier gas plays a substantial role in shaping AZO thin film crystal
properties while increasing dislocation density numbers and resulting in slightly heavier film
thickness than oxygen gas.
Publication Title Optical Properties of Aluminium-Doped Zinc Oxide Thin Films Synthesized via AACVD Using Nitrogen as a Carrier Gas
Publication Type journal
Publisher
Paper Link https://arxiv.org/abs/2502.03058
Publication Authors Kingsley Imoni-Ogbe, Onyekachukwu Mike Osiele, Vincent Akpoveta, Ese Umudi
Year Published 2025-02-05
Abstract This research combines AACVD technology with N? carrier gas to produce AZO thin films
while studying the structural and optical and morphological effects of Al doping at
concentrations ranging from 0% to 20%. The AACVD process took 400°C to deposit films onto
soda-lime glass surfaces before an annealing step at 450°C under nitrogen environment.
When utilizing nitrogen gas as carrier medium in X-ray Diffraction tests showed superior
crystalline structure through distinct powerful signals appearing in the (220), (311), and (222)
peaks. The films demonstrated smaller crystallite sizes and greater dislocation densities when the
Al doping concentration increased because this produced more lattice strain as well as structural
defects. The thickness of films obtained through profilometry increased slightly from undoped
ZnO at 102 nm to 115 nm for 20% Al-doped ZnO samples.
The UV absorbance of nitrogen-annealed films became stronger with peak intensities being more
pronounced at lower doping stages (5%). The bandgap energy of the produced films expanded
steadily when Al concentrations increased from undoped ZnO at 3.21 eV to 3.33 eV for ZnO
with 20% Al doping. This change matched the Burstein-Moss effect. Optoelectronic devices
benefit from the enhanced optical activity over broader wavelength ranges through the Al doping
rates exceeding 15% and up to 20% levels in these films.
The research reveals nitrogen carrier gas plays a substantial role in shaping AZO thin film crystal
properties while increasing dislocation density numbers and resulting in slightly heavier film
thickness than oxygen gas.
Publication Title Optical Properties of Aluminium-Doped Zinc Oxide Thin Films Synthesized via AACVD Using Nitrogen as a Carrier Gas
Publication Type journal
Publisher
Paper Link https://arxiv.org/abs/2502.03058
Publication Authors Kingsley Imoni-Ogbe, Onyekachukwu Mike Osiele, Vincent Akpoveta, Ese Umudi
Year Published 2025-02-05
Abstract This research combines AACVD technology with N? carrier gas to produce AZO thin films
while studying the structural and optical and morphological effects of Al doping at
concentrations ranging from 0% to 20%. The AACVD process took 400°C to deposit films onto
soda-lime glass surfaces before an annealing step at 450°C under nitrogen environment.
When utilizing nitrogen gas as carrier medium in X-ray Diffraction tests showed superior
crystalline structure through distinct powerful signals appearing in the (220), (311), and (222)
peaks. The films demonstrated smaller crystallite sizes and greater dislocation densities when the
Al doping concentration increased because this produced more lattice strain as well as structural
defects. The thickness of films obtained through profilometry increased slightly from undoped
ZnO at 102 nm to 115 nm for 20% Al-doped ZnO samples.
The UV absorbance of nitrogen-annealed films became stronger with peak intensities being more
pronounced at lower doping stages (5%). The bandgap energy of the produced films expanded
steadily when Al concentrations increased from undoped ZnO at 3.21 eV to 3.33 eV for ZnO
with 20% Al doping. This change matched the Burstein-Moss effect. Optoelectronic devices
benefit from the enhanced optical activity over broader wavelength ranges through the Al doping
rates exceeding 15% and up to 20% levels in these films.
The research reveals nitrogen carrier gas plays a substantial role in shaping AZO thin film crystal
properties while increasing dislocation density numbers and resulting in slightly heavier film
thickness than oxygen gas.
Publication Title Optical Properties of Aluminium-Doped Zinc Oxide Thin Films Synthesized via AACVD Using Nitrogen as a Carrier Gas
Publication Type journal
Publisher
Paper Link https://arxiv.org/abs/2502.03058
Publication Authors Kingsley Imoni-Ogbe, Onyekachukwu Mike Osiele, Vincent Akpoveta, Ese Umudi
Year Published 2025-02-05
Abstract This research combines AACVD technology with N? carrier gas to produce AZO thin films
while studying the structural and optical and morphological effects of Al doping at
concentrations ranging from 0% to 20%. The AACVD process took 400°C to deposit films onto
soda-lime glass surfaces before an annealing step at 450°C under nitrogen environment.
When utilizing nitrogen gas as carrier medium in X-ray Diffraction tests showed superior
crystalline structure through distinct powerful signals appearing in the (220), (311), and (222)
peaks. The films demonstrated smaller crystallite sizes and greater dislocation densities when the
Al doping concentration increased because this produced more lattice strain as well as structural
defects. The thickness of films obtained through profilometry increased slightly from undoped
ZnO at 102 nm to 115 nm for 20% Al-doped ZnO samples.
The UV absorbance of nitrogen-annealed films became stronger with peak intensities being more
pronounced at lower doping stages (5%). The bandgap energy of the produced films expanded
steadily when Al concentrations increased from undoped ZnO at 3.21 eV to 3.33 eV for ZnO
with 20% Al doping. This change matched the Burstein-Moss effect. Optoelectronic devices
benefit from the enhanced optical activity over broader wavelength ranges through the Al doping
rates exceeding 15% and up to 20% levels in these films.
The research reveals nitrogen carrier gas plays a substantial role in shaping AZO thin film crystal
properties while increasing dislocation density numbers and resulting in slightly heavier film
thickness than oxygen gas.
Publication Title Assessment of the Propertiesof ProtonExchange Membrane in FormulatedPolystyrene/Polyisopreneblend for Fuel Cell Application
Publication Type journal
Publisher
Publication Authors Idibie, Christopher A., Umudi, Queen E., Otache, Abel M., Clark, Poro D.
Year Published 2024-12-29
Abstract Researchers in recent times in the field of Fuel Cell Technology are passionately seeking alternative polymer-electrolyte membranes (PEMs), being the central component of fuel cell because of the very high cost and some disadvantages associated with the current commercial membrane, Nafionionomer. This has prompted this study by synthesizing PEM from formulated polystyrene/polyisoprene via sulphonation process at initial acid concentration (0.001 mol/L) to obtain membranes of different Ion Exchange Capacities (IECs) and Degrees of Sulphonation (DS). IECs obtained were 0.879, 1.314, 2.07 and 2.63 mmol/g for formulated PS/PI of 20/80, 30/70, 40/60 and 50/50 %, respectively with corresponding DS of 1.6, 2.38, 3.62 and 4.76 %, respectively. But DS increased with increase in the initial acid concentration as 0.0010, 0.0013, 0.0016, 0.0019 and 0.0023mol/L achieved DS of 2.37, 14.74, 32.89,38.56 and 41.97, respectively. The membrane achieved proton conductivity ranging between 10-3 to 10-2 S/cm, which competed well with the commercial state-of-the-art membrane. The water uptake and retention ability as well as the swelling ratio properties were found to be superior to the polyisoprene membrane of previous study; while the polyisoprene membrane of lower DS (28.84 %) absorbed68.87 % water by weight within 6 days, the newly synthesized membrane of ? 2.5-fold higher DS (41.97%)absorbed 66.78 % by weight of water in 10 days. This shows a better swelling resistance that can stand the test of time under PEM fuel cell operation
Publication Title Assessment of the Propertiesof ProtonExchange Membrane in FormulatedPolystyrene/Polyisopreneblend for Fuel Cell Application
Publication Type journal
Publisher
Publication Authors Idibie, Christopher A., Umudi, Queen E., Otache, Abel M., Clark, Poro D.
Year Published 2024-12-29
Abstract Researchers in recent times in the field of Fuel Cell Technology are passionately seeking alternative polymer-electrolyte membranes (PEMs), being the central component of fuel cell because of the very high cost and some disadvantages associated with the current commercial membrane, Nafionionomer. This has prompted this study by synthesizing PEM from formulated polystyrene/polyisoprene via sulphonation process at initial acid concentration (0.001 mol/L) to obtain membranes of different Ion Exchange Capacities (IECs) and Degrees of Sulphonation (DS). IECs obtained were 0.879, 1.314, 2.07 and 2.63 mmol/g for formulated PS/PI of 20/80, 30/70, 40/60 and 50/50 %, respectively with corresponding DS of 1.6, 2.38, 3.62 and 4.76 %, respectively. But DS increased with increase in the initial acid concentration as 0.0010, 0.0013, 0.0016, 0.0019 and 0.0023mol/L achieved DS of 2.37, 14.74, 32.89,38.56 and 41.97, respectively. The membrane achieved proton conductivity ranging between 10-3 to 10-2 S/cm, which competed well with the commercial state-of-the-art membrane. The water uptake and retention ability as well as the swelling ratio properties were found to be superior to the polyisoprene membrane of previous study; while the polyisoprene membrane of lower DS (28.84 %) absorbed68.87 % water by weight within 6 days, the newly synthesized membrane of ? 2.5-fold higher DS (41.97%)absorbed 66.78 % by weight of water in 10 days. This shows a better swelling resistance that can stand the test of time under PEM fuel cell operation
Publication Title Utilization of Kaolin Clay for Enhanced Ballast Water Treatment
Publication Type journal
Publisher Unidel Journal of Science, Technology & Innovations
Publication Authors Umudi Queen Ese, Umudi Ogheneyoma Peter, Nwakwannego Ese
Year Published 2024-12-29
Abstract Treatment of ballast water from ships using aluminosilicate clay from Ikpeshi, Edo State was studied. The physiochemical parameters and poly-aromatic hydrocarbon content of the water were measured before and after treatment using standard methods. Clay was characterized using x-ray diffractometer and atomic absorption spectrophometer (AAS). The results of the analysis showed that some parameters of the water as electrical conductivity, 1:309.000, salinity 45.31%, nitrates 7.32 mg/l, phosphorous 4.21 mg/l, total bacterial
count 5.8×107cfu were higher than the permissible levels which may be detrimental to the ecosystem. Aftertreatment with kaolin aluminosilicate clay, their levels were reduced. Dissolved oxygen was increasedfrom2.42to 6.30 mg/l, while total alkalinity decreased from 25.21 mg/l to 8.110 mg/l, total turbidity from24.03to4.3×10 mg/l, total dissolved solids from 350 mg/l to 5.23 mg/l and total hardness 37.32 to 4.532 mg/l. The treatment caused reduction in some of the parameters which in turn favour aquatic life forms and improves the ecosystem in general. It is therefore pertinent to conclude that kaolinte clay is a promising adsorbent for the treatment of ballast water in ship both off-shore and on-shore and can effectively remove solids, organic solvents and toxins from ballast water, it is abundant, easy to apply and low-cost
Publication Title Concentration and Health Risk Assessment of Toxic Metals in Giblets of Free-Range Chickens in Lokoja, Nigeria.
Publication Type journal
Publisher Journal of Trace Elements and Minerals.
Paper Link https://doi.org/10.1016/j.jtemin.2024.100209
Publication Authors Emurotu, J. E, Abubaka, T.A, Chukwu L, Umudi, E. Q, Imunorhi, V. I, Paul, G. D and Oboni, G. U (2025).
Year Published 2025-03-20
Abstract Background: Potentially toxic metals present in food and food products are a threat to humans. To monitor the
quality of giblets consumed and to evaluate the risk to the public’s health, this study aimed to determine the
residual concentrations of heavy metals (Al, As, Cd, Cr, Mn, Ni, Pb and Zn) in the gizzard, kidney, and liver of
free-range chickens.
Methods: The mean concentration of metals in the giblets was determined using Inductively Coupled Plasma
Optical Emission Spectrometry. The mean was used to assess the cancer risk, hazard index, total hazard quotient,
and estimated daily intake of the metals under investigation.
Results: Metal concentrations ranged from 17.6 - 105.6 (Al), nd to 3.15 (As), nd - 4.38 (Cr), 0.26 - 73.6 (Mn), nd -
7.21(Ni), nd - 6.67 (Pb), and 8.42 - 63.3 (Zn) mg kg? 1
. The mean concentrations measured exceeded JECFA’s
Maximum Allowable Concentrations limit except for Al and Cd. Cd was below the detection limit. The estimated
daily intake of the toxic metals As, Cr, Ni, and Pb exceeded the threshold limit. The metals’ calculated Target
Hazard Quotient and Hazard Index values were ? 1. The percentage contribution of Pb to the HI value was the
highest. The HI was 66.9% and 65.4% in adults and children, respectively. The HI sequence through the consumption of giblets in adults is Pb ? As > Cr > Ni > Zn > Al > Mn. The corresponding sequence in children is Pb
> As > Cr > Mn > Ni, Zn > Al. The carcinogenic risk of As, Cr, Ni, and Pb exceeded the threshold limit,
indicating a potential cancer risk through consumption.
Conclusion: Free-range chickens are not selective in picking their food in the environment hence strict regime of
proper disposal of waste products containing metals into the environment should be advocated and followed.
Publication Title Influence of Nitrogen Carrier Gas on the Optical, Structural, Mechanical and Electrical Properties of Aluminium-Doped Zinc Oxide Thin Films Deposited via AACVD
Publication Type journal
Publisher Journal of Science and technology research
Paper Link https://doi.org/10.37933/nipes/7.2.2025.1
Publication Authors Kingsley Imoni-Ogbe, Onyekachukwu Mike Osiele, Vincent Akpoveta, Ese Queen Umudi, Clara Ogbebor Ekwe, John Arigbede, Bright Ogbolu, Oscar Enajite
Year Published 2025-05-15
Abstract This study analyses the optical characteristics,together with the structural, mechanical,and electrical attributes of Aluminium-doped Zinc Oxide (AZO) thin films produced through Aerosol-Assisted Chemical Vapour Deposition (AACVD), using nitrogen (N?) gas as the transport medium. The deposition occurredat 400°C, while the soda-lime glass substrates received annealing treatment at 450°C within a nitrogen atmosphere. X-ray Diffraction (XRD) analysis showed improved crystal formation through distinct peaks at (220), (311),and (222), as aluminium-doping levels rose and simultaneously generated small crystallite particles, rising dislocation density levels with expanded lattice deformations. The Scanning Electron Microscopy analysis revealed hexagonal ZnO grains evolved intoirregularly shaped small grains, accompanied by higher densities of defects as Al compositions increased in the ZnO material. Profilometry analysis showed that the ZnO film layer got thicker from 102 nm in undoped ZnO to 115 nm in 20% Al-doped ZnO. The maximum UV absorbance took place at 5% Al doping, while the bandgap expanded from 3.21 eV (undoped ZnO) to 3.33 eV (20% Al-doped ZnO) from the UV-Visible spectroscopic analysis, which is attributed to the Burstein-Moss effect.The peak concentration of 1.0 × 10²¹ cm?³ carriers was observed during Hall effect tests at 5% Al doping, yet it decreased as the doping concentration surpassed this level, due to defects that trapped additional charges. More than half of the doping groups (Al) improved UV ray absorption between 15-20%, but the film’smechanical structure deteriorated during testing. The study demonstrates the efficiency of nitrogen gas in modifying AZO film characteristics, which results in suitable applications for transparent electrodes, solar cells, and photodetectors, because of its adaptable electrical and optical features.
Publication Title Influence of Nitrogen Carrier Gas on the Optical, Structural, Mechanical and Electrical Properties of Aluminium-Doped Zinc Oxide Thin Films Deposited via AACVD
Publication Type journal
Publisher Journal of Science and technology research
Paper Link https://doi.org/10.37933/nipes/7.2.2025.1
Publication Authors Kingsley Imoni-Ogbe, Onyekachukwu Mike Osiele, Vincent Akpoveta, Ese Queen Umudi, Clara Ogbebor Ekwe, John Arigbede, Bright Ogbolu, Oscar Enajite
Year Published 2025-05-15
Abstract This study analyses the optical characteristics,together with the structural, mechanical,and electrical attributes of Aluminium-doped Zinc Oxide (AZO) thin films produced through Aerosol-Assisted Chemical Vapour Deposition (AACVD), using nitrogen (N?) gas as the transport medium. The deposition occurredat 400°C, while the soda-lime glass substrates received annealing treatment at 450°C within a nitrogen atmosphere. X-ray Diffraction (XRD) analysis showed improved crystal formation through distinct peaks at (220), (311),and (222), as aluminium-doping levels rose and simultaneously generated small crystallite particles, rising dislocation density levels with expanded lattice deformations. The Scanning Electron Microscopy analysis revealed hexagonal ZnO grains evolved intoirregularly shaped small grains, accompanied by higher densities of defects as Al compositions increased in the ZnO material. Profilometry analysis showed that the ZnO film layer got thicker from 102 nm in undoped ZnO to 115 nm in 20% Al-doped ZnO. The maximum UV absorbance took place at 5% Al doping, while the bandgap expanded from 3.21 eV (undoped ZnO) to 3.33 eV (20% Al-doped ZnO) from the UV-Visible spectroscopic analysis, which is attributed to the Burstein-Moss effect.The peak concentration of 1.0 × 10²¹ cm?³ carriers was observed during Hall effect tests at 5% Al doping, yet it decreased as the doping concentration surpassed this level, due to defects that trapped additional charges. More than half of the doping groups (Al) improved UV ray absorption between 15-20%, but the film’smechanical structure deteriorated during testing. The study demonstrates the efficiency of nitrogen gas in modifying AZO film characteristics, which results in suitable applications for transparent electrodes, solar cells, and photodetectors, because of its adaptable electrical and optical features.
Publication Title Treatment of Gasoline-Contaminated Soil Using Process Optimized Fenton Oxidation Technique: An Environmental Management and Contamination Mitigation Approach
Publication Type journal
Publisher Remediation Journal of Environmental Cleanup cost, Technologies & Techniques
Paper Link https://doi.org/10.1002/rem.70022
Publication Authors Vincent Oshevwiyo Akpoveta, John Opeyemi Thomas, Ese Queen Umudi, Clara Ogbebor Ekwe, John Arigbede, Bright Ogbolu, Faluyi Olumide
Year Published 2025-05-20
Abstract Environmental management of petroleum-contaminated soil is a significant challenge. This study addresses hydrocarbon contamination issues arising from petroleum activities by focusing on the potential application of process-optimized Fenton-reactants in treating gasoline-contaminated soil. Optimization protocols and characterization of soil quality indicators followed standard procedures, with the application of molecular spectroscopy to determine total petroleum hydrocarbon (TPH) content as gasoline. Gasoline-contamination severely impacted pH (6.70–5.40), conductivity (262–137??S/cm), phosphorus (8.30 to 6.20?mg/kg), and TPH concentrations (25.0–1400?mg/kg). Soil texture and heavy metals were not significantly affected. Treatment efficiency was monitored by evaluating soil quality indicators, heavy metals, and TPH. pH, conductivity, organic carbon, organic matter, TPH, and metals removal were improved after optimized Fenton-oxidation treatment, which indicates the effectiveness of the technique. The determined optimal concentration of Fenton-reactants from the process optimization was 50% v/v H2O2 and 250?mg/L FeSO4, at a determined optimal temperature of 30°C and pH 4. The optimized technique yielded excellent results with a significant decrease (92%) in TPH content after 9?h. Kinetics of the remediation process followed a zero-order mechanism with a rate constant of 120.18?mg/kg?hr?1 and a half-life of 5?h, 49?min. The technique is seen to be effective not only for the removal of gasoline contaminants but also for the restoration of lost soil properties. The application of a well-harnessed, process-optimized Fenton-oxidation approach using the right infrastructure on gasoline-contaminated soil will help remediation experts in environmental management, protection, and contaminant mitigation.
Publication Title Treatment of Gasoline-Contaminated Soil Using Process Optimized Fenton Oxidation Technique: An Environmental Management and Contamination Mitigation Approach
Publication Type journal
Publisher Remediation Journal of Environmental Cleanup cost, Technologies & Techniques
Paper Link https://doi.org/10.1002/rem.70022
Publication Authors Vincent Oshevwiyo Akpoveta, John Opeyemi Thomas, Ese Queen Umudi, Clara Ogbebor Ekwe, John Arigbede, Bright Ogbolu, Faluyi Olumide
Year Published 52025-02-01
Abstract Environmental management of petroleum-contaminated soil is a significant challenge. This study addresses hydrocarbon contamination issues arising from petroleum activities by focusing on the potential application of process-optimized Fenton-reactants in treating gasoline-contaminated soil. Optimization protocols and characterization of soil quality indicators followed standard procedures, with the application of molecular spectroscopy to determine total petroleum hydrocarbon (TPH) content as gasoline. Gasoline-contamination severely impacted pH (6.70–5.40), conductivity (262–137??S/cm), phosphorus (8.30 to 6.20?mg/kg), and TPH concentrations (25.0–1400?mg/kg). Soil texture and heavy metals were not significantly affected. Treatment efficiency was monitored by evaluating soil quality indicators, heavy metals, and TPH. pH, conductivity, organic carbon, organic matter, TPH, and metals removal were improved after optimized Fenton-oxidation treatment, which indicates the effectiveness of the technique. The determined optimal concentration of Fenton-reactants from the process optimization was 50% v/v H2O2 and 250?mg/L FeSO4, at a determined optimal temperature of 30°C and pH 4. The optimized technique yielded excellent results with a significant decrease (92%) in TPH content after 9?h. Kinetics of the remediation process followed a zero-order mechanism with a rate constant of 120.18?mg/kg?hr?1 and a half-life of 5?h, 49?min. The technique is seen to be effective not only for the removal of gasoline contaminants but also for the restoration of lost soil properties. The application of a well-harnessed, process-optimized Fenton-oxidation approach using the right infrastructure on gasoline-contaminated soil will help remediation experts in environmental management, protection, and contaminant mitigation.