A study of heavy metal pollution of Asa River, Ilorin. nigeria; trace metal monitoring and geochemistry |
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Authors: | F A Adekola O A A Eletta |
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Institution: | (1) Department of Chemistry, University of Ilorin, Ilorin, Nigeria |
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Abstract: | Chemical and mineralogical characterization of sediments collected from seven different locations along Asa River in Ilorin,
Nigeria have been carried out. The total concentration of Mn, Cr, Fe, Zn and Cu were monitored using Total Reflection X-ray
Fluorescence (TXRF). The range of concentration of these metals were: Mn (179.9–469.4, Fe (1998.4–4420.4) Cr (3.0–11.3), Zn
(26.6–147.6), Cu (1.9-13.3) mg kg−1. The mineralogical composition was determined using X-ray diffraction (XRD) method and this was complemented with the Infrared
Spectroscopy. It was found that the sediments of Asa River had predominantly quartz, and goethite was present in five of the
seven locations. Chromite (FeCr3O4) and pyrite (FeS) were also identified at some locations along the River. Higher enrichment factors were calculated for Zn,
Cr, Mn, and Fe in the sediment indicating anthropogenic source of contamination. Pyrite was prominent at a location receiving
effluent from a detergent industry and near a refuse dumpsite. |
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Keywords: | XRD Geochemistry Heavy metals Asa River Sediments Nigeria |
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