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Adsorption of Decomposed-Granite Soils Varing with Weathering on Heavy Metals  

Kwon, Minseok (Green Technology Institute, Gyeongnam National Univ. of Science and Technology)
Lee, Myoungeun (School of Urban System Engineering, Gyeongnam National Univ. of Science and Technology)
Mok, Youngjin (Dept. of Civil Engineering, Kyung Hee Univ.)
Chung, Jaewoo (Dept. of Environmental Engineering, Gyeongnam National Univ. of Science and Technology)
Publication Information
Journal of the Korean GEO-environmental Society / v.14, no.10, 2013 , pp. 59-64 More about this Journal
Abstract
Effects of weathering intensity on the adsorption of heavy metals such as lead(Pb) and copper(Cu) onto decomposed granite soils were investigated by a series of batch tests. The chemical components such as $SiO_2$, $K_2O$ and $Na_2O$ having relatively high solubility were reduced and the oxidized $Fe_2O_3$ content was increased with the increase of weathering intensity. Weathering of granite soils increased the ignition loss and specific surface area, while it decreased the permeability. The lead and copper adsorptions onto the decomposed granites were enhanced with the increase of weathering intensity, mainly due to the increase of specific surface area and clayed contents. Adsorption of lead and copper onto the weathered granites could be more adequately described by the pseudo-second-order kinetic model than the pseudo-first-order model.
Keywords
Granite soil; Weathering index; Heavy metal; Adsorption; Kinetics;
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Times Cited By KSCI : 2  (Citation Analysis)
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