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Sorption/Desorption Characteristics of Halogenated Aliphatic Compounds from Activated Sludge, Sediment, and Clay

지방족 할로겐화합물의 활성슬러지와 해안저질 및 점토에서의 흡탈착 특성

  • 김종오 (경성대학교 건설공학부 및 환경지역발전연구소) ;
  • 박종석 (경상대학교 대학원 환경보전학과) ;
  • 최연돈 (경상대학교 대학원 환경보전학과)
  • Published : 2002.09.01

Abstract

This study was performed : 1) to establish the experimental analysis conditions for the sorption and desorption of toxic organic contaminants to/from the activated sludge, sediment, and clay, and 2) to determine the sorption and desorption equilibrium coefficients of some representative halogenated aliphatic compounds. Through the preliminary sorption test using Azo dye, a setting of quantitative experimental conditions to determine the sorption and desorption characteristics was decided as follows; equilibration time of 180 minutes, centrifuge for 15 minutes at 5000$\times$g, and 500mg/$\ell$ of TOC concentration. The sorption and desorption characteristics of halogenated aliphatic compounds onto activated sludge, sediment and clay could be described very well using the Freundlich isotherm. The preference of the average sorption capacity of the overall compounds showed in the sequence sediment 0.26mg/g, clay 0.23mg/g, and activated sludge 0.11 mg/g. The desorption rate of the sorbed compounds onto activated sludge, sediment and clay was approximately 89.8%, 35.3%, and 66.4%, respectively.

Keywords

Halogenated Aliphatic Compounds;Activated sludge;Sediment Clay;Sorption;Desorption.

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