Journal of Navigation and Port Research (한국항해항만학회지)

Korean Institute of Navigation and Port Research (한국항해항만학회)
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Stabilization of mixed heavy metals in contaminated marine sediment using steel slag

제강슬래그를 이용한 해양오염퇴적물 내 혼합 중금속 안정화

  • Shin, Woo-Seok (Institute of Marine Science and Technology Research, Hankyong National University) ;
  • Kim, Young-Kee (Department of Chemical Engineering, Hankyong National University)
  • 신우석 (한경대학교 해양과학기술연구센터) ;
  • 김영기 (한경대학교 화학공학과)
  • Received : 2014.05.07
  • Accepted : 2014.06.16
  • Published : 2014.06.30
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Abstract

In this study, the adsorption efficiency of mixed heavy metals in aqueous solution was investigated using steel slag. Moreover, heavy-metal stabilization treatment of contaminated marine sediment was achieved using steel slag as stabilizing agents. Heavy metal adsorption was characterized using Freundlich and Langmuir equations. The equilibrium adsorption data were fitted well to the Langmuir model in steel slag. The adsorption uptake of heavy metals were higher in the order of $Pb^{2+}$ > $Cd^{2+}$ > $Cu^{2+}$ > $Zn^{2+}$ > $Ni^{2+}$. The steel slage was applied for a wet-curing duration of 150 days. From the sequential extraction results, the exchangeable, carbonate, and oxides fractions of Ni, Zn, Cu, Pb, and Cd in sediment decreased by 13.0%, 6.0%, 1.3%, 17.0%, and 50.0%, respectively.

본 연구에서는 제강슬래그를 이용하여 수용액상에서 혼합 중금속의 흡착능을 평가하였다. 게다가, 제강슬래그를 안정화제로 활용하여 해양오염퇴적물 내 Ni, Zn, Cu, Pb 및 Cd에 대하여 중금속 안정화 실험을 수행하였다. 중금속 흡착 특성은 Freundlich 및 Langmuir 방정식을 이용하여 해석하였으며, 평형흡착 실험결과는 Langmuir 모델에 잘 부합되었고 $Pb^{2+}$ > $Cd^{2+}$ > $Cu^{2+}$ > $Zn^{2+}$ > $Ni^{2+}$순으로 평형흡착량이 많았다. 안정화 방법은 오염퇴적물에 제강슬래그 첨가 후 150일간 습윤 양생 하였다. 연속추출 실험결과로부터, 미처리 오염퇴적물과 비교해서 Ni, Zn, Cu, Pb 및 Cd의 이온교환, 탄산염, 산화물 형태는 제강슬래그에 의해 각각 13%, 6.0%, 1.3%, 17% 및 50% 감소하였다.

Keywords

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