• Feasibility Study on Stabilization Technique of Cr(VI)-contaminated Site
  • Yoon, Geun Seok;Yoo, Jong Chan;Ko, Sung-Hwan;Shim, Myung-Ho;Cho, Myung-Hyun;Baek, Kitae;
  • Department of Environmental Engineering and Soil Environment Research Center, Chonbuk National University;Department of Environmental Engineering and Soil Environment Research Center, Chonbuk National University;Ecophile Co. Ltd.;Ecophile Co. Ltd.;Department of Environmental Engineering and Soil Environment Research Center, Chonbuk National University;Department of Environmental Engineering and Soil Environment Research Center, Chonbuk National University;
  • Cr(VI)으로 오염된 부지의 안정화 기술에 의한 정화 타당성 연구
  • 윤근석;유종찬;고성환;심명호;조명현;백기태;
  • 전북대학교 환경공학과 및 토양환경연구센터;전북대학교 환경공학과 및 토양환경연구센터;(주)에코필;(주)에코필;전북대학교 환경공학과 및 토양환경연구센터;전북대학교 환경공학과 및 토양환경연구센터;
Abstract
In this study, a remedial investigation using reductive stabilization was conducted to treat Cr(VI)-contaminated soil. The influences of various operational parameters, including reaction time and the mass of ferrous iron, were also evaluated. The study site was contaminated with a large amount of Cr(III) and Cr(VI), and the selected treatment method was to stabilize Cr(VI) with ferrous iron, which reduced Cr(VI) to Cr(III) and stabilized the chromium, although a greater mass of ferrous iron than the stoichiometric amount was required to stabilize the Cr(VI). However, some Cr(III) re-oxidized to Cr(VI) during the drying process, and addition of a strong reducing agent was required to maintain reducing conditions. With this reducing agent, the treated soil met the required regulatory standard, and the mass of Cr(III) re-oxidized to Cr(VI) was significantly reduced, compared to the use of only Fe(II) as a reducing agent.

Keywords: Remediation;Chromium;Reduction;Re-oxidation;

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