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My postgraduate training gave me a broad background in Analytical, Environmental and Food Chemistry. Further research provided the opportunity of depth of knowledge in diverse analyses of chemical parameters of environmental importance. In this regard my contribution to knowledge is primarily on application of analytical techniques to detect and characterize toxic materials and its health implication in the environment, as well as production and analysis of starch novel of starch from sources and biogas for domestic and industrial uses.
Environmental Assessment of Organic Pollutants.
I demonstrated the sensitivity and specificity of atomic absorption spectrometry (AAS) and Gas Chromatography- Mass Spectrometry as versatile analytical techniques. Heavy metals as toxicants (lead, cadmium, zinc, copper, chromium and iron etc) in various environmental media were determined in water (Publications 28,21,20,17,16, 14,15,12, 10 and soil nutrients and heavy metal contents was assessed. Findings showed that manure used in organic farming has liming effect on the soil while nutrients are concentrated at the soil surface (Publication 34). Anthropogenic activities from different urban land uses contribute significantly to the pollution levels (Publications 38 and 39).
Health Risk Assessment of Pollutants in the Environment .
Furthermore, pollutants in the environment were reported to have diverse effects on human health. I also investigated the health implication of some pollutants such as air pollutants in cement factory, steel foundry and major highways to examine the effects on the environment with particular reference to humans. The findings indicated unacceptably high concentrations of total suspended particulate matter, carbon monoxide, sulphur dioxide and nitrogen oxide. Water quality of hand–dug wells, boreholes and public water sources were analysed and results indicated higher physicochemical parameters and presence of some microorganisms including coliforms (Publications 28, 27, 26, 23,22,21,17,16,14,12 and 36).
Toxicity of polycyclic aromatic hydrocarbons (PAHs) remains a global challenge. PAHs on selected dumpsite soils were examined to provide base line data on Nigeria dumpsites. It was observed that some dumpsites were heavily polluted with PAHs due to the types of materials deposited on the sites (Publication 24). PAHs were also determined in water from various sources and human health risk estimated. The reports showed higher carcinogenic risks in children than adults (Publication 33). Very high concentrations of Polychlorinated biphenyl (PCBs) and heavy metals were found in lake water, sediments and fish above the World Health Organization (WHO) limits (Publication 31). Aquatic organisms as bio-indicators of PAHs pollution and its associated health risk were also investigated and concentrations of total PAHs was higher in fish than acceptable limits (Publication 40). In this vein, bisphenol A (BPA) and diisobutylphthalate (DIBP) in soil were found to induce oxidative stress and DNA damage in earthworms (Publication 41).
Analytical and Food Chemistry
Analysis of Vitamin C from raw and blanched vegetables at different time intervals was determined. The findings revealed that increase in duration of blanching caused reduction in level of the Vitamin. Extraction and compositional analysis of oil from under-utilized seed oils were studied. Findings showed that the oils obtained were comparable in quality to standard oils. In search for novel, cheap and sustainable raw materials for the production of starch due to overdependence on corn starch. I conducted research on isolation, physical and chemical modifications and characterization of the starch produced from under-utilized cereals such as varieties of Sorghum and Acha. The starch obtained were of comparable quality to corn starch which is used in food and pharmaceutical industries (Publications 25, 19,13,9,8,7, 6,4,3,2 and 1). Production of biogas using faecal sludge co-digested with various types of organic feed stock materials was investigated and materials were effective in producing quality biogas and nutrient rich bio-slurries as organic fertilizer (Publication 35). Biogas was highly rich in methane and comparatively more efficient than liquefied petroleum gas and kerosene in terms of cooking time (Publication 37).
The frontiers of knowledge have also been extended by attending conferences and presentation of scientific paper as evidenced in the listed conference papers (Publications 44, 45, 46 and 47).
In view of the fact that most of my studies centred on environmental pollution assessment using principles of analytical chemistry, it is appropriate that my Professorship be in Analytical and Environmental Chemistry.
B.Sc.;
M.Sc.;
Ph.D. (Ibadan)
i. Remediation of the polluted soil from Exide Battery, Iwofun Olodo, Ibadan 2016
ii. Effect of brewery effluent on the soil and crop plant. 2015
iii. Determination of the adhesive strength of modified sorghum starches 2014
i. Member, Institute of Chartered Chemists of Nigeria
ii. Member, Chemical Society of Nigeria
iii. Member, Science Association of Nigeria
i. 2nd Annual Conference on Environmental Health Sciences held at the University of Ibadan, Nigeria, November 10 -15, 2014.
Paper presented: Heavy Metals and PCBs Concentrations in Eleyele Lake, Ibadan, Oyo State, Nigeria.
ii. 3rd Annual Conference on Environmental Health Sciences held at the University of Ibadan, Nigeria, November 1 -5, 2015.
Paper presented: Heavy metals and PCBs concentration in Eleyele lake, Ibadan, Oyo State. Nigeria.
iii. 3rd Annual Conference on Environmental Health Sciences held at the University of Ibadan, Nigeria, November 1 -5, 2015.
Paper presented: Environmental Pollution around Petrol Stations in Abeokuta Metropolis, Ogun State, Nigeria.
iv. 57th Annual Conference of the Nigerian Geographical Association (ANG) University of Lagos 2016. 10-15th April 2016.
Paper presented: Urban Flood Risk and Vulnerability Mapping around Olodo River, Ibadan, Nigeria.
i. Research Reports, Dissertation and Thesis
i. Olayinka, O.O. (1996): Extraction and Physico-chemical properties of cashew nut oil (Anacardium occidentale) B.Sc Research Report, Submitted to Department of Chemistry, University of Ado-Ekiti, Ado-Ekiti, Nigeria. 50 p.
ii. Olayinka, O.O. (1999): Determination of iron and manganese in Nigerian foodstuffs M.Sc. Dissertation, University of Ibadan, Ibadan, Nigeria. 80 p.
iv. Olayinka, O.O. (2010): Physicochemical properties, retrogradative behaviour and x-ray diffraction of native and modified starches of three varieties of sorghum (Bicolor L. Moench. Ph.D Thesis, University of Ibadan, Ibadan, Nigeria. 201 p.
ii. Articles in Learned Journals
f1. Adebowale, K. O., Olu-Owolabi, B. I, Olayinka, O.O. and Lawal, O.S. (2005): Effect of Heat-Moisture Treatment and Annealing on Physico-Chemical Properties of Red Sorghum Starch. African Journal of Biotechnology. 4(9):928-933. Published by Academic Journals. P.O. Box 5170-00200 Nairobi, Kenya.
f2. Olayinka, O.O., and Adebayo, E.A. (2006): Extraction and Analysis of the Oil obtained from Anacardium occidentale (Cashew nut). International Journal of Chemistry. 16(4):241-244. Published by Institute of Science and Technology, India
f3. Olayinka, O.O., B.B. Adeleke., Ajayi, O.A., Onifade, A.J. (2007): Proximate Analysis and Physicochemical Properties of Cola millenii Seed Oil. International Journal of Chemistry. 17(1):73-75. Published by Institute of Science and Technology. India
f4. Olayinka, O.O., Adebowale, K.O., Olu-Owolabi, B.I. (2008): Effect of Heat-Moisture Treatment on Physicochemical Properties of White Sorghum Starch. Journal of Food Hydrocolloids. 22:225-230. Published by Elsevier. Germany
f5. Olayinka, O.O. and Ipeaiyeda, A.R. (2011): Chromium and lead concentrations in tomatoes (Solanum lycopersicum) and red pepper (Capsicum frutescens) cultivated in roadside farmland around high traffic density area of Ibadan, Nigeria. Soil and Sediment, Contamination. 20:1-11. Published by Taylor and Francis. United Kingdom
6. Olayinka, O.O., I. B. Ariyo, T .R. Fasola and J.A. Oyeniran. (2011): Phytochemical Constituents, Anti-Microbial Activity and Elemental Analysis of Zanthoxylum zanthoxyloides (Lam.) Watern. Journal of Forestry Research and Management. 8:80-91. Published by Forestry Research Institute of Nigeria.
f7. Olayinka, O.O., Olu-Owolabi, B.I. and Adebowale, K. O. (2011): Effect of Succinylation on the Physicochemical, Rheological, Thermal and Retrogradation Properties of Red and White Sorghum Starches. Journal of Food Hydrocolloids. 25(2):515-520. Published by Elsevier, Germany
f8. Ashifat, A.A., Omotugba, S.K., Kehinde, A.S. Olayinka, O.O. and Edugbola, G.O. (2012): Proximate Evaluation of Nutritional Value of Mango (Magnifera indica). International Journal of Research in Chemistry and Environment. 2(4): 244 245. Published by International Journal of Research in Chemistry and Environment (IJRCE). India.
f9. Olayinka, O.O., Kareem, A.M., Ariyo, I.B., Omotugba, S.K. and Oyebanji, A.O. (2012): Antioxidant Contents (Vitamin C) of Raw and Blanched Different Vegetable Samples. Food and Nutrition Sciences. 3(1):18-21. Published by Scientific Research, USA.
f10. Adedeji, O.H. and Olayinka, O.O. (2013): Heavy Metal Concentrations in Urban Stormwater Runoff and Receiving Stream. Journal of Environment and Earth Sciences. 3(7): 141-150. Published by International Institute for Science, Technology and Education (IISTE), USA. Available online at: http://www.iiste.org
11. Adedeji, O.H., Olayinka, O.O. and Oyebanji, F.F. (2013): Assessment of Traffic Related Heavy Metals Pollution of Roadside Soils in Emerging Urban Centres in Ijebu-North Area of Ogun State, Nigeria. Journal of Applied Science and Environmental Management. 17 (4):509-514. Published by World Bank assisted National Agricultural Research Project (NARP) University of Port-Harcourt, Nigeria. Available online at www.bioline.org.br/ja
f12. Olayinka, O.O., Adedeji, O.H. and Oladeru, I.B. (2013): Water Quality and Bacteriological Assessment of Slaughterhouse Effluent on Urban River in Nigeria. Journal of Applied Science in Environmental Sanitation. 8(4):277-286. Published by Department of Environmental Engineering Sepuluh Nopember Institute of Technology, Surabaya and Indonesian Society of Sanitary and Environmental Engineers (IATPI) Jakarta, Indonesia. Available online at http://www.trisanita.org/jases
f13. Olayinka, O.O., Adebowale, K.O. and Olu-Owolabi, B.I. (2013): Physicochemical Properties, Morphological and X-Ray Pattern of Chemically Modified White Starch. (Bicolor-Moench). Journal of Food Science and Technology. 50(1):70-77. Springer, Published by Association of Food Scientists and Technologists, Germany.
f14. Adedeji, O.H., Olayinka, O.O. and Nwanya, F.C. (2014): Soil and Water Pollution Levels in and Around Urban Scrapyards. Journal of Environmental Science, Toxicology and Food Technology, 8(4). Ver. II: 01-08, Published by International Organization of Scientific Research, USA. Available online at www.iosrjournals.org.
f15. Adedeji, O.H. and Olayinka, O.O. (2014): Concentrations of Heavy Metals in Dumpsite Leachate and Effects on Adjacent Stream on Ajakanga, Ibadan, Nigeria. Journal of Applied Science in Environmental Sanitation. 9(2):113-122. Published by Department of Environmental Engineering, Sepuluh Nopember Institute of Technology (ITS) Surabaya, and Indonesian Society of Sanitary and Environmental Engineers (IATPI) Jakarta, Indonesia. Available online at http://www.trisanita.org/jases
f16. Adedeji, O.H. and Olayinka, O.O. (2014): Micro-Pollutants in Urban Residential Roof Runoff: Environmental and Health Implications. Journal of Environmental Science, Toxicology and Food Technology. 8(2) Ver.III: 55-63 Published by International Organization of Scientific Research, USA. Available online at www.iosrjournals.org
f17. Olayinka, O.O. Adedeji, O.H. and Sanni, S.S. (2014): Water Quality of Hand-Dug Wells at Close Proximity To Pit Latrine And Its Health Implication in Isara–Remo. Journal of Environmental Science, Toxicology and Food Technology. 8(6) Ver. II:56-64. Published by International Organization of Scientific Research, USA. Available online at www.iosrjournals.org
f18. Olayinka, O.O., Adedeji, O.H. and Dada, O. (2014): Determination of Concentrations of Heavy Metals in Municipal Dumpsite Soil and Plants at Oke-Ogi, Iree, Nigeria. International Research Journal of Pure & Applied Chemistry. 4(6): 656-669, Published by Science Domain International, Third Floor, 207 Regent Street, London, W1B 3H. United Kingdom. Available online at http://www.sciencedomain.org
f19. Olu-Owolabi, B.I., Olayinka, O.O., Adegbemile, A.A. and Adebowale, K. O.(2014): Comparison of Functional Properties between Native and Chemically Modified Starches from Acha (Digitaria Stapf) Grain . Food and Nutrition Sciences. 5:222-230. Published by Scientific Research, USA.
f20. Olayinka, O.O. and Adedeji, O.H. (2014): Concentration of Heavy Metals in Soils and Water near Some Mechanic Villages in Abeokuta Metropolis, Ogun State, Nigeria. Journal of Advances in Chemistry. 8(3):1667-1679. Published by Council for Innovative Research. USA. Available online at www.cirworld.com
f21. Adedeji, O.H. and Olayinka, O.O. (2015): Assessment of Groundwater Contamination by Textile Effluent of Discharges in Ikorodu, Nigeria. Applied Environmental Research. 37 (1): 35-48. Published by Environmental Research Institute, Chulalongkorn University, Bangkok., Thailand Available online at http://www.tci-thaijo.org/index.php/jer
22. Olayinka, O.O., Adedeji, O.H. and Ajibola, F.O. (2015): Monitoring Gaseous and Particulate Air Pollutants near Major Highways in Abeokuta, Nigeria. Journal of Applied Science and Environmental Management. 19(4):751-758. Published by World Bank assisted National Agricultural Research Project (NARP) University of Port-Harcourt, Nigeria Available online at www.bioline.org.br/ja
23. Olayinka, O.O, Adedeji, O.H. and Balogun, Yewande. (2015): Air and Heavy Metal Pollution around a Steel Foundry in Ogijo, Ogun State, Nigeria. Journal of Science Research, 14:9-16. Published by the Faculty of Science, University of Ibadan, Ibadan, Nigeria
f24. Olayinka, O.O., Adedeji, O.H. and Ipeaiyeda, R.A. (2015): Determination of Polycyclic Aromatic Hydrocarbons (PAHs) on selected Dumpsites in Abeokuta Metropolis, SW, Nigeria. Applied Environmental Research. 37 (3): 33-48. Published by Environmental Research Institute, Chulalongkorn University, Bangkok., Thailand. Available online at http://www.tci-thaijo.org/index.php/jer
f25. Olayinka, O.O., Adebowale, K.O. and Olu-Owolabi, B. I. (2015): Effect of Chemical Modifications on Thermal, Rheological and Morphological Properties of Yellow Sorghum Starch. Journal of Food Science and Technology. 52(12): 8364- 8370, Springer, Published by Association of Food Scientists and Technologists. Germany
f26. Adedeji, O.H., Olayinka, O.O., and Tope-Ajayi, O.O. (2016): Mapping of Traffic- Related Air Pollution Using GIS Techniques in Ijebu-Ode, Nigeria. Indonesian Journal of Geography. 48 (1): 76 – 86. Published by the Faculty of Geography, Gadjah Mada University (UGM) and The Indonesian Geographers Association, Indonesia Available online at: http://jurnal.ugm.ac.id/index.php/ijg
f27. Olayinka, O.O., Adedeji, O.H., Oresanya, O.J. and Alabi-Thompson, O.F. (2016): Environmental and Health Impact of Cement Factory Production in Ibese, Ogun State, Nigeria. Applied Environmental Research. 38 (2): 93-110. Published by Environmental Research Institute, Chulalongkorn University, Bangkok., Thailand
28. Adedeji, O.H., Olayinka, O.O., and Oladimeji, O (2017): Physicochemical and Microbiological Examination of Hand-Dug Wells, Boreholes and Public Water Sources in Selected Areas of Ibadan, Nigeria. Journal of Applied Science and Environmental Management. 21(3): 576-584. Published by World Bank Assisted National Agricultural Research Project (NARP) University of Port-Harcourt. Available online at www.bioline.org.br/ja
29. Adedeji, O.H., Olayinka, O.O., Badejo, A.A. and Osunde, E.O. (2016): Assessing Heavy Metals in Soil and Groundwater Around Petrol Stations in Abeokuta Metropolis, Nigeria. Journal of Science Research. Faculty of Science, University of Ibadan, Ibadan. Nigeria Vol. 15. Published by Faculty of Science, University of Ibadan, Ibadan, Nigeria.
30. Adedeji, O.H., Olayinka, O.O., Badejo, A.A. and Adedokun, N. (2017): An Assessment of Ambient Air Quality Around Diesel Powered Telecommunication Base Stations in Abeokuta, South-western Nigeria. International Journal of Ecology and Environmental Studies (IJEES). 4(1), Published by Institute of Ecology and Environmental Studies. Obafemi Awolowo University, Ile-Ife, Osun State, Nigeria.
*31. Olayinka, O.O., Akande, O.O., Bamgbose, K. and Adetunji, M.T. (2017): Physicochemical Characteristics and Heavy Metal Levels in Soil Samples Obtained from Selected Anthropogenic sites in Abeokuta, Nigeria. Journal of Applied Science and Environmental Management. 21(3): 883-891. Published by World Bank Assisted National Agricultural Research Project (NARP) University of Port-Harcourt. www.bioline.org.br/ja
*f32. Olayinka,O.O., Adedeji,O.H. and Akinyemi, A.A. and Oresanya, O.J.(2017):Assessment of the Pollution Status of Eleyele Lake, Ibadan, Oyo State, Nigeria. Journal of Health and Pollution Vol. 8, No. 15.
*f33. Olayinka,O.O., Adewusi,A.A.Olujimi, O.O. and Aladesida, A.A. (2018): Concentration of Polycyclic Aromatic Hydrocarbons and Estimated Human Health Risk of Water Samples Around Atlas Cove, Lagos, Nigeria. Journal of Health and Pollution Vol. 8, No. 20
*f34. Azeez, J. O., Ojewande, B. O. Olayinka, O. O. and Adesodun, J. K. (2018): Impact Assessment of Organic Farming on Soil Nutrients and Heavy Metal Content. Pertanika Journal Tropical Agricultural Science 41 (4): 1811-1831.
*35 Soyingbe,A.A., Olayinka, O., Bamgbose, K. and Adetunji, M.T. (2019): Effective Management of Faecal Sludge through Co-Digestion for Biogas Generation. .Journal of Applied Science and Environmental Management. 23(6): 1159-1168. Published by World Bank Assisted National Agricultural Research Project (NARP) University of Port-Harcourt. www.bioline.org.br/ja
*36. Terebo, O., Olayinka, O.O., Bamgbose, O., Abdul, W.O. and Martins, O. (2019): Physicochemical Quality of Borehole water of selected Settlements in the Coastal Area of Ondo-State, Nigeria Journal Chemical Society. Nigeria, Vol. 44, No. 5, pp 846 -857
*37. Soyingbe,A.A., Olayinka,O.O., Bamgbose,O. and Adetunji, M.T. (2019): Compositional Analysis of Biogas Produced from Faecal Sludge Co-digested with organic feedstocks, Journal Chemical Society. Nigeria, Vol. 44, No. 5, pp 858 -870
*38. Adedeji, O.H., Olayinka, O.O., and Tope-Ajayi, O.O and Awosika, D.A. (2019): Spatial Distribution and Health Risk Assessment of Heavy Metals in Urban Parks and Gardens Soils in Lagos State, Nigeria. Journal of Agricultural Science and Environment, 18(1&2): 16-35.
*f39. Adedeji, O.H., Olayinka, O.O., and Tope-Ajayi, O.O (2019): Spatial Distribution and Health Risk Assessment of Soil Pollution by Heavy Metals in Ijebu- Ode, Nigeria. Journal of Health and Pollution, Vol. 9, No. 22
*f40. Olayinka, O.O., Adewusi, A.A., Olujimi, O.O. and Aladesida,A.A. (2019): Polycyclic Aromatic Hydrocarbons in Sediment and Health Risk of Fish, Crab and Shrimp Around Atlas Cove, Nigeria. Journal of Health and Pollution, Vol. 9, No. 24
*f41. Olujimi, O.O., Ayoola, R., Olayinka, O.O., Dosunmu, O., Rotimi, S.and Aladesida,A.A. (2020): Evaluation of antioxidant enzymes performances and DNA damage induced by bisphenol A and diisobutylphthalate in Hyperiodrilus africanus-earthworms. Journal of Emerging Contaminants, Vol.6, pp 1-9.
42. Adedeji, O.H., Olayinka, O.O., Tope-Ajayi, O.O. and Azeez, O.I. (2020): Land use/Land ,cover changes due to Quarrying in Odeda Local Government Area of Ogun State, Nigeria: An Assessment and Implication for Rural Livelihood. Journal of Meteorology and Climate Science, 18 (1): 113-122.
43. Adedeji, O.H., Olayinka, O.O., and Tope-Ajayi, O.O and Adekoya , A,S. (2020): Assessing spatial distribution, potential ecological and human health risks of soil heavy metals contamination around a Trailer Park in Nigeria. Scientific African, 10: 1-14.
44. Adedeji, O.H., Olayinka, O.O., Ogundiran, T and Tope-Ajayi, O.O (2020): Urban Flood Impacts, Flood Water Quality and Risk Mapping of Olodo area, Ibadan, Nigeria.
Journal of Natural Science, Engineering and Technology, 19(1&2): 56-73.
45. Olayinka, O.O., Adedeji, O.H. and Ahmed, S.A. (2020): Oil spillage measures caused drastic reduction in total petroleum hydrocarbon levels in petroleum depot in Ibadan, Southwestern Nigeria. Cogent Environmental Science, Vol. 6, No 1826744 :1-19.
46. Terebo, O., Olayinka, O.O., Soyingbe, A.A., and Bambgose, O. (2022): Levels of Polyaromatic Hydrocarbons in Borehole water of Selected Settlements in the Coastal Area of Ondo-State, Nigeria. International Journal of Current Research and Applied Studies, 1 (2): 74-82.
47. Terebo, O., Soyingbe, A.A., Olayinka, O.O., and Bambgose, O. (2022): Microbial Quality of Borehole water and prevalence of water-related diseases in Selected Settlements in the Coastal Area of Ondo-State, Nigeria. International Journal of Advanced Research in Science, Engineering and Technology, 9 (6): 19394 -19402.
48. Terebo, O., Olayinka, O.O., Soyingbe, A.A., and Bambgose, O. (2022): Endemicity of water-related diseases and Efficacy of Questionnaire based Indices in Selected Riverine settlements of Ondo-State, Nigeria. Palgo Journal of Biological Science, 1(1): 1-10.
49. Adedeji, O.H., Olayinka, O.O., Badejo, A.A. and Osunde, E.O. (2022): Spatial distribution and Environmental Risk Assessment of Petrol Stations in Abeokuta Metropolis. Journal of Applied Science and Environmental Management, Vol.26, No 11:1843-1850.
iii. Chapters in Books
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