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The comparison of the adsorption characteristic of heavy metals onto soil mixed with food compost using retardation coefficient  

Joo, You-Yoen (광운대학교 환경공학과)
Kang, Seon-Hong (광운대학교 환경공학과)
Publication Information
Journal of Korean Society of Water and Wastewater / v.22, no.2, 2008 , pp. 245-250 More about this Journal
Abstract
Adsorption experiment was carried out to find the adsorption capacity and characteristics of heavy metals(Cd, Pb) onto soil and mixed soil with food compost. Result showed that mixed soil having higher organic content adsorbed more heavy metal than soil, indicating that food compost can be used effectively to prevent soil pollution. Linear adsorption isotherm which adopted to find the adsorption characteristics was used to calculate Retardation Factor(R). The value of Retardation Factor(R)s of Pb and Cd in mixed soil, found as 34.54, 24.42 respectively, are higher than those in soil which were found as 4.64, 3.67, respectively. The value of Retardation Factor(R) using Freundlich adsorption isotherm could be presented by the functions of concentration and showed similar result as the linear one. But Freundlich adsorption isotherm showed higher relationship than linear one and the retardation factor(R) from freundlich adsorption isotherm was thought as more effective method to assess adsorption capacity because it could reflect gradient and intercept of the isotherm.
Keywords
adsorption; retardation factor; heavy metal;
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