Determination of some toxic trace metals in Nigerian river and harbor water samples by neutron activation analysis |
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| Authors: | Ch. L. Ndiokwere V. P. Guinn |
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| Affiliation: | (1) Department of Chemistry, University of California, 92717 Irvine, California, (USA);(2) Present address: Department of Chemistry, University of Benin, Benin City, Nigeria |
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| Abstract: | The determination of As, Cd, Cr, Hg, Mn, Mo, Ni, Sb, and Se in two Nigerian rivers and two Nigerian harbor waters is described. The water samples were preconcentrated by both evaporation at room temperature and freeze evaporation under reduced pressure. Postirradiation chemical separation of sodium, using hydrated antimony pentoxide (HAP) in 6M HCl, and of bromine, by oxidation with KMnO4 and subsequent removal by extraction with CHCl3, was employed. The measured concentrations of these elements in some water samples, which are relatively high, can be attributed to local pollution. |
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