© Journal Of Chemical Society Of Nigeria (jcsn) . 2013. Vol. 38 No. 2
Publisher: Chemical Society of Nigeria
Detoxification of Hg (II), As (III) and Pb (II) Ions From Waste Water By Biosorption With Coconut Fiber
J. C. Igwe, S. I. Okenwa, A. A. Abia
KEYWORDS: Detoxification, wastewater, Biosorption, Heavy metals, pH, Temperature.
ABSTRACT:The pollution of the environment with toxic metals is a result of human activities such as mining and metallurgy. The effects of these metals on the ecosystems are of large economic and public health significance. Bioremediation consists of a group of applications, which involve the detoxification of hazardous substances instead of transferring them from one medium to another by means of microbes and plants. The pH, temperature and particle size effects on the detoxification of Hg2+, As3+ and Pb2+ metal ions using modified and unmodified coconut fiber was studied in this paper. pH significantly affected the adsorption with maximum amount adsorbed at pH of 10-12. Adsorption increased, as temperature increased until at about 40 oC. The bigger particle size of 600μm showed greater adsorption. Modification also increased the absorption capacity. These results will serve as parameters for design of treatment plants for heavy metal detoxification using agricultural by- products such as coconut fibre.
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