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

Korean Geotechnical Society (한국지반공학회)
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Investigation of Stabilization Effect on Arsenic Contamination Soils using Zerovalent Iron and Industrial by-products

영가철 및 산업폐기물을 활용한 비소오염토양의 안정화 효과조사

  • Yu, Chan (Dept. of Agricultural Engineering, Gyeongsang National university(Inst. of Agri. & Life Sci.)) ;
  • Yun, Sung-Wook (Graduate School, Gyeongsang National University) ;
  • Baek, Seung-Hwan (Graduate School, Gyeongsang National University) ;
  • Park, Jin-Chul (Graduate School, Gyeongsang National University) ;
  • Lee, Jung-Hoon (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)) ;
  • 윤성욱 (경상대학교농공학과대학원) ;
  • 백승환 (경상대학교농공학과대학원) ;
  • 박진철 (경상대학교농공학과대학원) ;
  • 이정훈 (경상대학교농공학과대학원) ;
  • 임영철 (광해방지사업단 토양복원팀) ;
  • 최승진 (광해방지사업단 토양복원팀) ;
  • 장민 (광해방지사업단 토양복원팀)
  • Published : 2008.03.28
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Abstract

In order to investigate stabilization effect on As-contaminated soils treated by zero-valent iron(ZVI) and industrial by-products, batch tests and column tests were carried out with As-contaminated soils collected from farmland around the abandoned mine site. In batch tests, ZVI and industrial by-products(blast furnace slag, steel refining slag and oyster shell powder) were used as treatment materials to reduce As. Industrial by-products were mixed with As-contaminated soils, in the ratio of 1%, 3%, 5% and 7% on the weight base of dried soil. After incubation, all samples showed the reduction of As concentration and it was expected that ZVI and steel refining slag were effective treatment materials to remove As among treatment materials used in batch test. In column tests, columns were made by acrylic with the dimension of diameter=10cm, height=100cm, thickness=1cm and these columns were filled with untreated soils and treated soils mixed with ZVI and steel refining slag(mixing ratio=3%). Distilled water was discharged into the columns with the velocity of 1 pore-volume/day. During test, pH, EC, Eh and As concentration were measured in the regular term(1 pore-volume). As a result, ZVI and steel refining slag were shown 93%, 62% reduction of As concentration respectively by comparison with untreated soils. Therefore, if ZVI and steel refining slag are used as treatment materials in As-contaminated soils, it is expected that the As concentration in soils is reduced effectively.

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