• Remediation of Pb-Contaminated Soil by Soil Washing using Hdrochloric Acid
  • Baek, Ki-Tae;Kim, Do-Hyung;Seo, Chang-Il;Yang, Jung-Seok;Lee, Jae-Young;
  • Department of Environmental Engineering, Kumoh National Institute of Technology;Department of Environmental Engineering, Kumoh National Institute of Technology;Department of Environmental Engineering, Kumoh National Institute of Technology;KIST Gangneung Institute;Environment & Fire Control Team, Korea Railroad Research Institute;
  • 염산을 사용한 납 오염 토양의 토양 세척에 의한 정화
  • 백기태;김도형;서창일;양중석;이재영;
  • 금오공과대학교 환경공학과;금오공과대학교 환경공학과;금오공과대학교 환경공학과;한국과학기술연구원 강릉분원;철도기술연구원 환경화재연구팀;
Abstract
The feasibility of soil washing was investigated to remediate Pb-contaminated field soil. Hydrochloric acid was used as a washing agent. As mixing time increased from 5 min to 120 min, removal efficiency of Pb from contaminated soil increased from 69.3% to 81.9%. Two times washing with 0.2 M HCl showed 96% removal efficiency even at mixing time of 10 min. The Pb content in soil increased sharply as particle size of soil decreased, and removal efficiency was highly dependent on mixing time and temperature. Based on this result, acid washing technologies can be applied to remediate the Pb-contaminated soil used in this study.

납으로 오염된 실제 토양을 처리하기 위해 토양세척기술의 적용성을 평가하였다. 세척제로는 염산을 사용하였으며, 0.2 M 염산을 사용하여 고액비 1:3으로 하여 10분간 접촉하여 2회 세척하여준 결과 96%의 제거율을 보였다. 세척액과 토양의 접촉시간을 5분에서 120분까지 증가하였을 때, 제거효율은 69.3%에서 81.9%로 증가하였다. 입경별 토양세척 효율은 온도와 교반시간에 영향을 받았으며, 20분 이상 교반하여 준다면, 0.075 mm 이하, 0.075 mm-2.0 mm, 2.0-4.0 mm 의 입경별 토양에서는 모두 99%의 제거효율을 보였다. 이상의 결과는 본 연구에 사용된 납 오염 토양은 토양세척기술을 적용하여 효과적으로 처리할 수 있는 것을 의미한다.

Keywords: Pb-contaminated soil;soil washing;acid washing;heavy metal;

Keywords: 납오염 토양;토양세척;산세척;중금속;

This Article

  • 2007; 12(3): 17-22

    Published on Jun 30, 2007

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