• A Study on the Removal of Heavy Metals in Soil by Sewage Sludge Biochar
  • Kim, Hye-Won;Bae, Sunyoung;Lee, Jai-Young;
  • Department of Environmental Engineering, The University of Seoul;Department of Chemistry, Seoul Women's University;Department of Environmental Engineering, The University of Seoul;
  • 하수슬러지의 Biochar특성을 이용한 토양내 중금속 제거 연구
  • 김혜원;배선영;이재영;
  • 서울시립대학교 환경공학과;서울여자대학교 화학과;서울시립대학교 환경공학과;
Abstract
This study proposed a low temperature hydrothermal carbonization to treat and recycle sewage sludge and determined the optimal conditions for the biochar production. The physical and chemical properties of biochar were analyzed and its sorption capacity for heavy metals was evaluated. To produce biochar, 50 g of sewage sludge was heated at 220, 230, and $240^{\circ}C$ for 1, 2, 3, 5, 8, and 10 hours in a reactor. The optimal conditions to produce biochar was $230^{\circ}C$ and 8 hours. Sorption capacity tests were conducted for arsenic (As), cadmium (Cd), copper (Cu), lead (Pb), zinc (Zn) and nickel (Ni). Among them, lead was shown the highest heavy metal adsorption efficiency of biochar, followed by copper, cadmium, zinc, and nickel, but arsenic was hardly adsorbed overall.

Keywords: HTC (Hydrothermal Carbonization);Biochar;Sewage sludge;Heavy metal adsorption;

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This Article

  • 2013; 18(3): 58-64

    Published on Jun 30, 2013

  • 10.7857/JSGE.2013.18.3.058
  • Received on Feb 12, 2013
  • Revised on Jun 13, 2013
  • Accepted on Jun 15, 2013