토양세척법에 의한 클레이사격장 납 오염토양의 정화에 관한 연구

A Study on the Remediation of Lead Contaminated Soil in a Clay Shooting Range with Soil Washing

  • 이인화 (조선대학교 환경공학과) ;
  • 설명수 (조선대학교 환경공학과)
  • Lee, In-Hwa (Department of Environmental Engineering, Chosun University) ;
  • Seol, Myung-Soo (Department of Environmental Engineering, Chosun University)
  • 투고 : 2010.08.05
  • 심사 : 2010.09.29
  • 발행 : 2010.10.31

초록

For an efficient remediation of Pb-contaminated soil (S-1) in a clay shooting range, a soil washing test was performed with mineral acid, organic acid, chelating agent, and chloride. The Pb extraction efficiency of extractant (0.1 M) used in the washing test showed the order of HCl > $Na_2$-EDTA > NTA > DTPA > citric acid > malic acid > succinic acid > acetic acid > $CaCl_2$ > $MgCl_2$, for S-1 soil. As compared to initial Pb concentration, extraction efficiency by the concentration of extractant was 93.35%, 80.80%, 73.92%, and 24.57% in S-1 soil for HCl (0.5 M, pH 1.10), $Na_2$-EDTA (0.01 M, pH 3.99), citric acid (0.5 M, pH 1.27), and $MgCl_2$ (0.1 M, pH 8.82), respectively. S-1 soil had 56.83% of residue form and 43.17% of non-residue form (18.04% of exchangeable form), respectively. Although the concentrations of these fractions sharply decreased after HCl washing, since the exchangeable forms with relatively large mobility are still distributed as high as 18.78% (to Pb total content in residual soils) in S-1 soil, it is necessary to devise a proper management plan for residual soils after soil washing application.

키워드

참고문헌

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