• The Characteristics of the Biochar with the Synthetic Food Waste and Wood Waste for Soil Contaminated with Heavy Metals
  • Baek, Ye-Seul;Lee, Jai-Young;Park, Seong-Kyu;Bae, Sunyoung;
  • Department of Environmental Engineering, The University of Seoul;Department of Environmental Engineering, The University of Seoul;KOFIRST R&D Center;Department of Chemistry, Seoul Women's University;
  • 인공 음식물 혼합 폐기물 바이오차의 토양 중금속 흡착 가능성을 위한 특성 분석
  • 백예슬;이재영;박성규;배선영;
  • 서울시립대학교;서울시립대학교;(주)케이에프이앤이 코퍼스트R&D센터;서울여자대학교;
Abstract
When processing the biomass by Hydrothermal carbonization (HTC), a slow pyrolysis process, it produces bio-gas, biooil, and biochar. Among these end products, biochar is known for isolating or storing carbon and being used as a soil amendment. In this study, the characteristics of biochar generated by HTC at $250^{\circ}C$ for 1 hour, 2 hours, 3 hours, and 20 hours with synthetic food wastes and wood wastes were analyzed for potential uses in soil contaminated with heavy metals. The yield of biochar (weight %) increased when the ratio of wood wastes increased and showed a decreasing tendency as reaction time increased. Elemental analysis of biochar based on various conditions showed a maximum of 70% carbon (C) content. The carbon content showed an increasing tendency with the increase of wood wastes. Iodine adsorption test was peformed to determine the optimum reaction condition, which was 15% wood waste for mixing ratio and 2 hours for reaction time. Using biochar generated at the optimum condition, its capability of adsorbing heavy metals (Cd, Cu, Pb, Zn, Ni) was evaluated. It was concluded that lead (Pb) was removed efficiently while zinc (Zn) and nickel (Ni) were hardly adsorbed by biochar.

Keywords: Heavy metal adsorption;Hydrothermal carbonization;Biochar;Synthetic food waste;Wood waste;

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This Article

  • 2014; 19(1): 1-7

    Published on Feb 28, 2014

  • 10.7857/JSGE.2014.19.1.001
  • Received on Feb 6, 2013
  • Revised on Dec 20, 2013
  • Accepted on Dec 20, 2013