Distribution of Heavy Metals in Various Lake Matrices; Water, Soil, Fish and Sediments: A Case Study of the Lake Naivasha Basin, Kenya

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dc.contributor.author *Paul. M. Njogu1, Joseph. M. Keriko2, Ruth. N. Wanjau3 and Jackson. J. Kitetu1.
dc.date.accessioned 2014-04-08T15:12:42Z
dc.date.available 2014-04-08T15:12:42Z
dc.date.issued 2014-04-08
dc.identifier.uri http://hdl.handle.net/123456789/1317
dc.description.abstract Water, sediments, soil and fish; Common carp (Cuprinus carpio), Largemouth Blackbass (Micropterus salmoides), Tilapia (Oreochromis leucostictus) mirror carp (Cyprinus spectacularlus) from the lake Naivasha basin were analyzed for lead (Pb), cadmium (Cd), zinc (Zn), copper (Cu) and nickel (Ni). Samples were collected from the Main Lake, Lake Oloidien, Crescent Lake, River Malewa, Naivasha Municipal Council Sewer entry point, Flower farm discharge canals and the Kenya Wildlife Services (KWS) Sanctuary (Joan Roots farm). Fish samples were bought from fishermen while still alive and identified by the Kenya Marine and Fisheries Research Institute (KEMFRI) staff. The heavy metals concentrations were determined using Flame Atomic Absorption Spectrophotometry (AAS). The mean sediment concentrations (in µg/g dry weight) were 62.5 ± 26.5 for Ni, 42.39 ± 17.95 for Zn, 32.71 ± 16.94 for Pb, 1.52 ± 0.87 for Cu and 1.65 ± 0.96 for Cd respectively, whereas those in soil (in µg/g dry weight) were 25.69 ± 10.62 for Pb, 2.56 ± 1.40 for Cd, 53.28 ± 19.41 for Zn, 52.05 ± 22.64 for Ni and 1.02 ± 0.57 for Cu respectively. The mean heavy metal contents in fish (in µg/g wet weight) were 1.7 ± 0.91 for Pb, 0.33 ± 0.30 for Cd, 8.03 ± 2.7 for Zn, 14.34 ± 4.4 for Ni and 0.3 ± 0.11 for Cu, whereas those in the water column (total content) were 16.56 ± 9.55 µg/L for Pb, 12.69 ± 9.54 µg/L for Cd, 1.34 ± 0.48 mg/L for Zn, 0.18 ± 0.13 mg/L for Ni and 5.68 ± 3.71 µg/L for Cu respectively. The study shows that the most important sources of heavy metals pollution in the lake Naivasha basin are River Malewa, geochemical processes, flower farms and the Naivasha municipal council. . en_US
dc.description.sponsorship 1Institute for Energy and Environmental Technology, Jomo Kenyatta University of Agriculture and Technology, P. O. BOX 62000-00200, Nairobi, Kenya. 2Chemistry Department, Jomo Kenyatta University of Agriculture and Technology, P. O. BOX 62000-00200, Nairobi, Kenya. 3Chemistry Department, School of Pure and Applied Sciences, Kenyatta University, P. O. BOX 43844-00200, Nairobi, Kenya. en_US
dc.language.iso en en_US
dc.relation.ispartofseries In press in the Journal of Agriculture, Science and Technology;Volume 13(1)
dc.subject Keywords; Lake Naivasha, pollution, Heavy metals, sediments, soil, fish, Oloidien. en_US
dc.title Distribution of Heavy Metals in Various Lake Matrices; Water, Soil, Fish and Sediments: A Case Study of the Lake Naivasha Basin, Kenya en_US
dc.type Article en_US


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