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  • 03월 02일 17시 이후 : 초록수정 불가능, 일정확인 및 검색만 가능

제109회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Preparation magnetic biochar and its sorption capacity of Zn and Pb

2012년 2월 16일 15시 19분 49초
ENVR.P-1338 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
4월 25일 (수요일) 18:00~21:00
저자 및
배선영, 한수정, 박효선
서울여자대학교 화학과, Korea
Biochar derived from food waste is recognized as a substance for living and environmental applications. The conversion from food waste to biochar can be achieved through thermal, biological process, and hydrothermal treatment. In this study, biochar was prepared via hydrothermal carbonization (HTC) using a tubular reactor (patent applied) at 220 ℃ for 0.5 hr, 1 hr, 1.5 hr, and 2 hr. The food waste as feedstock for biochar preparation was made of cabbage, apple skin, the cooked rice, and fish, which contained the moisture content about 78(±5)%. In addition, magnetic biochar was prepared by chemical co-precipitation of Fe solution(Fe2+/Fe3+)with biochar powder and pyrolyzed at 400℃, which resulted in iron oxide magnetite formation. The iodine numbers that are closely related to the surface area were determined as 521(±17) mg/g for biochar at 1 hr, 526 (±64) mg/g for biochar at 2 hr while 635 mg/g for the commercial activated carbon. Boehm titration was performed to investigate the acidic and basic sites of biochars for their activity with other substances. Concentrations of caboxylic group, lactonic group, phenolic group, and basic group were 0.27, 1.94, 3.57, 4.75, respectively. FT-IR of magnetic biochar was taken to characterize the presence of Fe in the magnetic biochar. Sorption of Zn and Pb on biochar and magnetic biochar was performed and measured by ICP-AES. In future, the real food waste obtained from school cafeteria will be converted to biochar and magnetic biochar using HTC for comparing the adsorption of the biochar to that of Fe-biochar. keywords: biochar, magnetic biochar, Fe-coating, food waste, iron, biosorbent