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http://dx.doi.org/10.7857/JSGE.2014.19.1.001

The Characteristics of the Biochar with the Synthetic Food Waste and Wood Waste for Soil Contaminated with Heavy Metals  

Baek, Ye-Seul (Department of Environmental Engineering, The University of Seoul)
Lee, Jai-Young (Department of Environmental Engineering, The University of Seoul)
Park, Seong-Kyu (KOFIRST R&D Center)
Bae, Sunyoung (Department of Chemistry, Seoul Women's University)
Publication Information
Journal of Soil and Groundwater Environment / v.19, no.1, 2014 , pp. 1-7 More about this Journal
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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Times Cited By KSCI : 1  (Citation Analysis)
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