Journal of Korean Society of Water and Wastewater (상하수도학회지)

The Korean Society of Water and Wastewater (대한상하수도학회)
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The comparison of the adsorption characteristic of heavy metals onto soil mixed with food compost using retardation coefficient

지연계수를 이용한 음식물 퇴비 혼합 토양의 중금속 흡착특성 비교

  • 주유연 (광운대학교 환경공학과) ;
  • 강선홍 (광운대학교 환경공학과)
  • Received : 2008.03.03
  • Accepted : 2008.04.10
  • Published : 2008.04.15
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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

Acknowledgement

Supported by : 환경부

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