Speciation of Cd,Cu, Zn,Fe and Pb in sediments sampled from Lake Victoria basin,Kenya |
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| Authors: | D M K Ongeri J O Lalah S O Wandiga |
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| Institution: | (1) Department of Chemistry, Maseno University, Maseno, Kenya;(2) Department of Chemistry, University of Nairobi, Nairobi, Kenya |
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| Abstract: | Speciation studies revealed that the heavy metals in sediments of Lake Victoria Basin, Kenya, are highly bioavailable with
% average values of 73.3, 66.9, 65.6, 57.1 and 55.8 for Zn, Pb, Fe, Cu and Cd respectively being recorded. The high percentages
were attributed to the anthropogenic sources of these metals upstream and within the shores of Lake Victoria. Large loads
of floating organic matter were witnessed on the surface of water, and this most likely contributed to the high % of organic
matter of 7.58 recorded in this study. High % of organic matter in sediments contributes significantly to bioavailability
of heavy metals in sediments. |
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