Theses and Dissertations

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Browsing Theses and Dissertations by Author "ABDULQUDDUS ADELAYO ADEBAYO"

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    EFFECTS OF ASUNLE DUMPSITE, OBAFEMI AWOLOWO UNIVERSITY, ILE-IFE ON THE SPATIO-TEMPORAL VARIATIONS IN WATER QUALITY AND AMBIENT POLYCYCLIC AROMATIC HYDROCARBON (PAH) LEVELS
    (INSTITUTE OF ECOLOGY AND ENVIRONMENTAL STUDIES, FACULTY OF SCIENCE, OBAFEMI AWOLOWO UNIVERSITY., 2022) ABDULQUDDUS ADELAYO ADEBAYO
    This study characterised the solid waste of Asunle Dumpsite, Obafemi Awolowo University, Ile-Ife and the Polycyclic Aromatic Hydrocarbon (PAH) congeners of ambient air within three kilometre radius of the dumpsite. It determined the physico-chemical characteristics and plankton composition of water within 500 m radius of the dumpsite. It alsodumpsite. It assessed the efficacy of institutional, financial and legal frameworks established for the management of the dumpsite. These were with the view to determining the effects of Asunle dumpsite on the spatio-temporal variations in water quality and ambient PAH levels. The multi-stage sampling method was used to characterise Asunle dumpsite. The dumpsite was divided into 100 pixels and classified into four sections based on estimated waste heap. Four pixels were randomly selected from each category for waste characterisation into type and quantity. One air sampling station was located in the dumpsite and three others at 1 km distance from the dumpsite. Ambient air samples were collected using polyurethane foam (PUF) passive samplers fabricated in line with the modified Annex 3 of the South Pacific regional project passive air sampling protocol. PAHs trapped in each recovered PUF were extracted and quantitative analysis of PAHs in the samples was achieved using Gas Chromatography-Mass Spectrometer (GC-MS). Seventy-two water samples were collected upstream, dumpsite impact site and downstream of an adjoining stream once every month for 12 months. Temperature, pH, and conductivity were determined insitu. Water samples for analysis of other parameters were collected in 2.0 L plastic bottles. The physicochemical parameters were analysed using standard instrumental and non-instrumental methods. Heavy metals were analysed using Atomic Absorption Spectrometer. Plankton distribution and abundance were assessed by straining 30 L of water and examining under the microscope to identify species present using appropriate identification keys according to standard methods. Data obtained were analysed using Student T-test, ANOVA, correlation coefficient and regression analyses as appropriate