Proceedings of the Korean Geotechical Society Conference (한국지반공학회:학술대회논문집)

Korean Geotechnical Society (한국지반공학회)
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Leaching Characteristics on Arsenic Contaminated Soils after Stabilization Treatment

안정화 처리된 비소오염토양의 용출특성

  • Yu, Chan (Dept. of Agricultural Engineering, Gyeongsang National university(Inst. of Agri. & Life Sci.)) ;
  • Park, Jin-Chul (Graduate school, Gyeongsang National university) ;
  • Yoon, Sung-Wook (Graduate school, Gyeongsang National university) ;
  • Baek, Seungh-Wan (Graduate school, Gyeongsang National university) ;
  • Lee, Jung-Hun (Graduate school, Gyeongsang National university) ;
  • Lim, Young-Cheol (Soil Remediation Team, Mine Reclamation Corporation) ;
  • Choi, Seung-Jin (Soil Remediation Team, Mine Reclamation Corporation) ;
  • Jang, Min (Soil Remediation Team, Mine Reclamation Corporation)
  • 유찬 (경상대학교 농생대 지역환경기반공학과(농과원)) ;
  • 박진철 (경상대학교 대학원) ;
  • 윤성욱 (경상대학교 대학원) ;
  • 백승환 (경상대학교 대학원) ;
  • 이정훈 (경상대학교 대학원) ;
  • 임영철 (광해방지사업단 토양복원팀) ;
  • 최승진 (광해방지사업단 토양복원팀) ;
  • 장민 (광해방지사업단 토양복원팀)
  • Published : 2008.03.28
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Abstract

In this presentation, a leaching experiment which is followed the pH changes(pH=4, pH=7) and the mixing rates(1%, 3%, 5%, 7%) was carried out to examine the arsenic reduction effects and the leaching characteristics on arsenic contaminated soil after stabilization treatment in which 5 materials were used as stabilization agencies, i.e. ZVI(zero valent iron), blast furnace slag, steel refining slag, quick lime, and oyster shell meal. Except for blast furnace slag, the arsenic removal rate increased as the mixing rate increases of stabilization agencies. Arsenic leaching concentration was indicated that pH=7 condition is higher than pH=4 condition. This result shows because arsenic immobilization reaction increases as pH decreases, and arsenic adsorption takes place as pH decreases.

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