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학술발표회초록보기

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제117회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Atmospherically stable zero-valent iron modified with aromatic antioxidant compounds

등록일
2016년 2월 25일 11시 38분 34초
접수번호
1925
발표코드
ENVR.P-515 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
발표시간
4월 22일 (금요일) 13:00~14:30
발표형식
포스터
발표분야
환경에너지
저자 및
공동저자
오다솜, 장윤석*
포항공과대학교(POSTECH) 환경공학부, Korea
Antioxidant attached nanosized zero-valent iron (nZVI) particles were synthesized to reduce depassivated layer in oxygen-rich conditions. nZVI particles were modified with antioxidants such as N-phenylglycine, phenoxyacetic acid, 2-anilinoethanol, and phenoxyethanol which have phenolic or aromatic amine structures that can scavenge hydroxyl radicals very well. The modified nZVI particles showed lower removal efficiency of TCE than bare nZVI right after synthesized. However, TCE removal efficiency of the modified particles was evidently higher than bare nZVI particle for cases of 1 week, 2 weeks and 1 month of aging. Some characterizations were conducted including XPS, FT-IR, SEM and TEM to investigate the surface conditions. These indicated that the modified nZVI using N-phenylglycine and phenoxyacetic acid can make a stable structure with nZVI. The result of a dissolution test implied that hydroxyl radicals prefer attacking N or O sites of the antioxidants rather than producing an iron oxide layer, which can decrease reactivity. These materials are more applicable for in-situ remediation compared with the bare nZVI to maintain reduction reactivity longer.

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