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• W2117762302 abstract "Ala river is considered as one of the most important irrigation and drinking water resources in Akure, Nigeria. The distribution and accumulation of heavy metals: Cadmium (Cd), Chromium (Cr), Copper (Cu), Iron (Fe), Nicke l(Ni), Lead (Pb) and Zinc (Zn) in sediment were investigated in this river during the raining season between August and September, 2012. The mean concentration of these metals were: 0.09 µg/g for Cd; 20.30 µg/g for Cr; 6.61 µg/g for Cu; 648.04 µg/g for Fe; 1.50 µg/g for Ni; 16.90 µg/g for Pb; 3.78 µg/g for Zn dry weight. The result showed that the average concentrations of heavy metals were ranked as: Fe> Cr>Pb>Zn>Ni>Cr>Cd. To asses metal contamination in sediment, United State environmental Protection Agency's (USEPA) Guidelines were applied. The concentrations of Cd in all the stations were moderately polluted. The metals contamination in the sediments were also evaluated by applying Index of geo - accumulation(Igeo), contamination factor (Cf ) and Degree of contamination. On the basis of the mean values of Igeo, sediments are enriched with metals in the following order: Pb> Cd >Cr> Cu>Zn>Ni>Fe while according to contamination factor (Cf), Cd, Cr, Cu, Fe, Ni, Pb, Zn were at low contamination and in order of Pb> Cd>Cr>Cu>Zn>Ni>Fe. According to degree of contamination (Cd), site 4 has the highest amount of heavy metal contamination while site 9 has the lowest amount of heavy metal contamination. Pearson correlation indicates that Zn, Fe and Ni, Cr are highly significant (p <0.01), suggesting that the anthropogenic sources of these metals are closely related in the sediment from Ala river." @default.
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• W2117762302 date "2013-01-01" @default.
• W2117762302 modified "2023-10-03" @default.
• W2117762302 title "Assessment of Heavy Metal Contamination and Sediment Quality in the Urban River: A Case Of Ala River in Southwestern – Nigeria" @default.
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• W2117762302 doi "https://doi.org/10.9790/5736-0435663" @default.
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