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  • 09월 01일 18시 이후 : 초록수정 불가능, 일정확인 및 검색만 가능

제118회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Freezing effect on bromate reduction by organic compounds

2016년 8월 31일 13시 42분 30초
ENVR.P-634 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
10월 13일 (목요일) 11:00~12:30
저자 및
민대위, 최원용1,*
POSTECH 환경공학과, Korea
1POSTECH 환경공학부, Korea
A significant amount of bromate might be produced as a disinfection by-product (DBP) and introduced into the aquatic ecosystem as a result of the wide-spread use of ozonation for water treatment. Understanding the fate of this toxic species in nature becomes highly important to evaluate the potential impact of bromate. In this work, the reduction reaction of bromate was studied in ice phase. The results showed that the reduction of bromate is significantly enhanced in ice especially in the presence of humic substances (humic and fulvic acids) and other organic electron donors having carboxyl, hydroxyl, and aldehyde functional groups. This reduction process produced hypobromite and bromide as the final product. However, the bromate reduction in the aqueous phase was negligible. This observed enhancement of bromate reduction in the ice phase is likely due to the freeze concentration of bromates and various electron donors in liquid-like ice grain boundary region. The present results demonstrated the vital role of humic substances and other organic electron donors towards the reduction of bromate in icy environment. These results provide evidence that the freeze-thaw cycle of nature would help transform carcinogenic bromate into less toxic species like bromide and this proposed process might be important in the polar environment.