• Applicability of Stabilization with Iron Oxides for Arsenic-Contaminated Soil at the Forest Area near the Former Janghang Smelter Site
  • Yang, Kyung;Kim, Byung Chul;Yu, Gihyeon;Nam, Kyoungphile;
  • Environmental Assessment Group, Korea Environment Institute;Department of Civil and Environmental Engineering, Seoul National University;Department of Civil and Environmental Engineering, Seoul National University;Department of Civil and Environmental Engineering, Seoul National University;
  • (구)장항제련소 주변 송림산림욕장 지역 비소 오염토양의 철산화물을 이용한 비소 안정화 공법 적용 가능성 평가
  • 양경;김병철;유기현;남경필;
  • 한국환경정책평가연구원 환경평가본부;서울대학교 건설환경공학부;서울대학교 건설환경공학부;서울대학교 건설환경공학부;
Abstract
This study evaluated the applicability of stabilization of arsenic (As)-contaminated soil with iron (Fe) oxides at the former Janghang smelter site. Three Fe oxides (magnetite, goethite, and hematite) were tested as stabilizing agents to one soil sample collected from the study site. Amendment of 5% of magnetite, goethite, or hematite for one week showed the 64, 58, and 36% of reduction of the SBRC (Solubility/Bioavailability Research Consortium)-extractable (bioaccessible) As, respectively. Duration of stabilization more than one week did not show an additional reduction in SBRC-extractable As. Amendment of 5% of magnetite, which showed the highest As stabilization efficiency, was applied to 24 soil samples collected from the same site for one week, and 72% of reduction in the bioaccessible As was observed. The potential carcinogenic human health risk at the study site caused by As was $1.7{\times}10^{-5}$, which could be reduced to $8.1{\times}10^{-6}$ by the amendment of 5% magnetite for one week.

Keywords: Former Janghang smelter;Arsenic;Stabilization;Iron oxides;Magnetite;

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