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학술발표회초록보기

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

제109회 대한화학회 학술발표회, 총회 및 기기전시회 안내 The production of dissolved iron from iron oxides in ice

등록일
2012년 2월 16일 15시 21분 29초
접수번호
1036
발표코드
ENVR.P-1339 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
발표시간
4월 25일 (수요일) 18:00~21:00
발표형식
포스터
발표분야
환경에너지
저자 및
공동저자
정다운, 최원용1
포항공과대학교 환경공학과, Korea
1포항공과대학교 환경공학부, Korea
Iron is an important micronutrient controlling the growth and metabolism of living organisms. The environmental significance of iron biogeochemistry in the ocean has arrested much attention due to its sequestration of atmospheric CO2 by stimulating the biological pump. Bioavailable iron is mainly provided via atmospheric deposition of dissolved iron. In this work, we investigated the formation of dissolved iron from iron oxide particles in the presence of various organic acids under dark condition. The dissolution of iron oxides in the aqueous phase is negligible even in low pH conditions whereas those in ice were significantly accelerated upon freezing. The enhanced dissolution of iron in ice is explained by the “freeze concentration effect”. When ice crystals begin to form, iron oxides, organic acids, and protons are concentrated in the ice grain boundary region and accelerate the dissolution of iron. The enhanced dissolution of iron oxide in ice might propose an important release path of bioavailable iron in environments deficient of light.

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