J Korean Soc Environ Anal Search


Journal of the Korean Society for Environmental Analysis 2011;14(4):228-233.
Lead and Zinc Sorption on Biochar of Cabbage using Hydrothermal Carbonization
열수탄화반응으로 제조한 배추의 바이오차를 이용한 납과 아연의 흡착
배선영, 고은솔
Biochar has been generated from cabbage which is a major composition of food waste in Korea via hydrothermal carbonization reaction (HTC). Biochar, the solid product of HTC was produced at different reaction temperature of 150℃ and 220℃, and reaction time for 0.5 hr, 1.0 hr, and 2.0 hr. Then, a batch sorption experiment was conducted to measure the sorption capacity of biochar and the activated biochar. The activation of biochar was performed to improve the sorption capacity. The physicochemical characteristics of biochar and the activated biochar were identified using iodine number, FT-IR and SEM analyses. The sorption of zinc and lead was performed on cabbage as a feedstock, biochar (BC) produced at the optimum condition, and the activated biochar (ABC). The activated biochar showed the maximum sorption while cabbage had a minimum value of sorption for zinc and lead. The effect of pH on zinc and lead sorption from aqueous solution was also investigated in the range of pH 5 to pH 8. The pH of aqueous lead solution did not affect the sorption of lead on the activated carbon while sorption of zinc on the activated carbon was increased in pH of aqueous solution.
Key Words: biochar, food waste, hydrothermal carbonization, microreactor, Zn, Pb, sorption
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