Associate Professor / Reader
At the Chemistry department office
Appointment on Visitation important
Topic: Pollution Studies/Determination Of Contaminants Of Different Environmental Media
Description: Environmental pollution as a result of man’s increasing activities such as burning of fossil fuels, use of agrochemicals and automobile exhaust emission has increased considerably in the past century due mainly to significant increases in economic activities and industrialization. Chemical toxicants e.g trace metals, polycyclic aromatic hydrocarbons, in food, water, soil, air have been introduced into the environment due to these anthropogenic activities with the view of examining the bioaccumulation, food-chain transfer, soil-plant transfer from which the human exposure risk and ecological risk can be accurately evaluated. Heavy metals are systemic toxins with specific neurotoxic, nephrotoxic, fetotoxic, teratogenic and carcinogenic effects. PAHs have been reported to be mutagenic, genotoxic and carcinogenic. Human exposure to this chemical toxicant through food and water consumption and air inhalation has aroused widespread health concern especially with regards to the increasing rate of cancer in the world. These environmental samples were collected and analyzed by utilizing many analytical instruments such as AAS with graphite furnace, UV/VIS, High performance liquid chromatography with UV detector, Gas chromatography systems with flame ionisation, electron capture detector and mass spectrometry detectors. Other research interest is on metal speciation studies (total and sequential). Separation and pre-concentration methods such as digestion and/or extraction, Soxhlet, solid phase extraction, passive samplers BCR sequential extraction, Freeze dryer, were employed. Statistical data analysis were carried out using scientific computer software such as SPSS.
|1.||Ph.D (Analytical / Environmental Chemistry)||Department of Chemistry, University of Ibadan, Ibadan, Nigeria||2003|
Impact of wastewater from drinking water supplies on surface water quality in developing countries: A case study of Lagos State Water works
Introduction: Freshwater availability is one of the major problems facing the world, and approximately, one third of drinking water requirement of the world is obtained from surface sources like rivers, dams, lakes, and canals . The biggest threat to sustainable water supply in Nigeria is the contamination of available water resources through pollution. Wastewater which comprises of several microorganisms, heavy metals, nutrients, radionuclides, pharmaceutical, and personal care products all find their way to surface water resources causing irreversible damage to the aquatic ecosystem and to humans as the aesthetic value of such water is compromised. Pollution combined with the human demand for water affects biodiversity, ecosystem functioning, and the natural services of aquatic systems upon which society depends on. Wastewater effluents should therefore be treated efficiently so as not to pose a health risk to the users of surface water resources. Aim: The aim of this study is to evaluate wastewater effluent (back-wash) from Lagos State Waterworks (minor and major) with respect to physico-chemical and biological characteristics and the impact on the quality of the surface water with a view of assessing possible human exposure to water as well as safety of the aquatic ecosystem. Methodology: The physical (such as pH, temperature, EC, colour, TDS), chemical (such as total solids, nitrate, phosphates, sulphates, Cl-, SS, Alkalinity, Hardness, COD, metals), and microorganism (such as total plate count and total coliform) parameters of the water samples would be analysed. Statistical analysis would be performed using SPSS. Expected Result: The result of the physical, chemical and microorganism analysis should be below the target safety limits. Contribution to knowledge: The study should be able to reveal the impact of wastewater discharge on a regular basis to surface water quality and mitigating measures.
YUSUF KAFEELAH is a Associate Professor / Reader at the Department of Chemistry
YUSUF has a Ph.D in Analytical / Environmental Chemistry from Department of Chemistry, University of Ibadan, Ibadan, Nigeria