[PDF][PDF] Downstream Sediments Analysis of Dredged Site along Onuebum/Agura Axis of Ekole Creek, Nigeria

CE Simon, OO Ogunlowo - American Journal of Sciences and …, 2022 - academia.edu
CE Simon, OO Ogunlowo
American Journal of Sciences and Engineering Research, 2022academia.edu
Water is vital for the survival of living organisms, but the water sediments reduce the
availability of the fresh water for use, hence the need to manage it through dredging. This
study analysed the sediments of Downstream of the dredged Ekole creek, where sediment
samples were collected from the; Upstream, Dredge point I, Dredge point II and
Downstream. The pH, Electrical Conductivity (EC), Nitrate, Fe, Pb, Cr, Mn, Ni, Zn and Cu
were analysed from the sample using standard methods. It was observed that the …
Abstract
Water is vital for the survival of living organisms, but the water sediments reduce the availability of the fresh water for use, hence the need to manage it through dredging. This study analysed the sediments of Downstream of the dredged Ekole creek, where sediment samples were collected from the; Upstream, Dredge point I, Dredge point II and Downstream. The pH, Electrical Conductivity (EC), Nitrate, Fe, Pb, Cr, Mn, Ni, Zn and Cu were analysed from the sample using standard methods. It was observed that the Downstream pH increased to 7.79 from 7.17 pH of the Upstream, though it is reduced at Dredge point I (6.37) and latter increased to 6.57 at Dredge point II; similar trend was noticed for EC concentration; 37µS value of Downstream is higher than 33µS Upstream that is increased to 160µS Dredge point I, but dropped at Dredge point II to 31µS however, the Nitrate concentration at the Upstream was 0.0018 mg/kg, raised at Dredge point I to 0.065 mg/kg then dropped at Dredge point II and the Downstream to 0.0562 mg/kg and 0.0174 mg/kg respectively. Low concentration of heavy metals were found in the Dredge points of the sediment samples while high levels were found at the Upstream and Downstream points. Sediments at Downstream are more alkaline with higher EC, low nitrate but, more iron. It can be inferred that, the dredging activities increases the pH and heavy metals of the sediment in the water, at the Downstream. Hence water at the Downstream is less toxic and can be used.
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