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Removal of Heavy Metals from Aqueous Solution by a Column Packed with Peat-Humin  

Shin, Hyun-Snag (Department of Environmental Engineering, Seoul National University of Technology)
Lee, Chang-Hoon (Korea Institute of water and Environment, Korea Water Resource Corporation)
Lee, Yo-Snag (Korea Institute of water and Environment, Korea Water Resource Corporation)
Kang, Ki-Hoon (Technology Research Institute, Daelim Industrial Cp., Ltd.)
Publication Information
Journal of Korean Society of Environmental Engineers / v.27, no.5, 2005 , pp. 535-541 More about this Journal
Abstract
Peat humin(p-Humin) extracted from Canadian Sphagnum peat moss was packed in a column and removal of heavy metal ions such as Cd, Cu and Pb from aqueous solution under flow conditions was studied. The metal ions were removed not only from single-element solutions but also from a multi-metal solution. Column kinetics for metal removal were described by the Thomas model. For single-component metal solutions, the maximum adsorption capacities of the p-Humin for Pb, Cu and Cd were 138.8, 44.66 and 41.61 mg/g, respectively. The results of multi-component competitive adsorption showed that adsorption affinity was in the order of Pb $\gg$ Cu > Cd. The adsorbed metal ions were easily deserted from the p-Humin with 0.05 N $HNO_3$ solution. It is apparent that 95% of the heavy metal ions were recovered from the saturated column. This investigation provides possibility to clean up heavy-metal contaminated waste waters by using the natural biomass, p-Humin as an environmentally friendly and cost-effective new biosorbents.
Keywords
Humin; Adsorption; Cd; Cu; Pb; Thomas Model; Column Experiment;
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