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Adsorption Characteristics of Lead on Kaolinite  

장경수 (인하대학교 토목공학과)
강병희 (인하대학교 토목공학과)
Publication Information
Journal of Soil and Groundwater Environment / v.7, no.4, 2002 , pp. 24-30 More about this Journal
Abstract
The laboratory adsorption batch tests were performed to investigate the adsorption characteristics of Pb on kaolinite. The characteristics such as adsorption equilibrium time, adsorption capacity, adsorption isotherm were studied, and also the effects of pH and the mixing ratio on the adsorption of Pb on kaolinite were investigated. Test results show that the adsorption equilibrium state was reached within 24 hours, and the adsorbed amount of Pb increased, but the adsorption efficiency over the initial concentration of 198 mg/l decreased, with increasing the initial concentration of Pb. And the adsorption constant, 1/n was obtained 0.9584 by Freundlich isotherm equation. Regardless of the initial concentration of Pb. the adsorbed amount of Pb as well as the adsorption efficiency were increased with increasing pH values and converged to a certain constant value above 8 of pH values. And also the adsorbed amount of Pb increased with the mixing ratio, but its efficiency increased with the mixing ratio up to 8 and then showed the decreasing tendency above that.
Keywords
Adsorption; Kaolinite; Lead; Contamination level; pH; Mixing ratio;
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