광반응 및 광촉매 반응을 이용한 simazine의 분해 및 독성저감에 관한 연구

저작시기 2009.04 |등록일 2009.07.09 파일확장자어도비 PDF (pdf) | 6페이지 | 가격 6,000원
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서지정보

발행기관 : 한국환경보건학회 수록지정보 : 한국환경보건학회지 / 35권 / 2호
저자명 : 김문경, 오지윤, 손현석, 조경덕

목차

ABSTRACT
Ⅰ. 서론
Ⅱ. 실험 재료 및 방법
Ⅲ. 결과 및 고찰
Ⅳ. 결론
감사의 글
참고문헌

한국어 초록

The photocatalysis degradation of simazine, s-triazine type herbicide was carried out using circulating photo reactor systems. In order to search for the effective method to mineralize this compound into environmentally compatible products, this study compared the removal efficiencies of simazine by changing various parameters. First, under the photocatalytic condition, simazine was more effectively degraded than by photolysis and TiO₂ only condition. With photocatalysis, 5 ㎎/ℓ simazine was degraded to approximately 90% within 30 min, and completely degraded after 150 min. Ionic byproducts such as NO₂−, NO₃⁻, and Cl⁻ were detected from the photocatalysis of simazine, however, the recoveries were poor, indicating the presence of organic intermediates rather than the mineralization of simazine during photocatalysis. Two bioassays using V. fischeri and D. magna were employed to measure the toxicity reduction in the reaction solutions treated by both photocatalysis and photolysis. Simazine and its photocatalysis treated water did not exert any significant toxicity to V. fischeri, marine bacterium. However, the acute toxicity test using D. magna indicates that initial acute toxicity (EC₅₀ = 57.30%) was completely reduced (EC₅₀ = 100%) after 150 min under both photocatalysis and photoysis of simazine. This results indicates that photocatalysis and photolysis of simazine reduced the acute toxicity through mineralization.

영어 초록

The photocatalysis degradation of simazine, s-triazine type herbicide was carried out using circulating photo reactor systems. In order to search for the effective method to mineralize this compound into environmentally compatible products, this study compared the removal efficiencies of simazine by changing various parameters. First, under the photocatalytic condition, simazine was more effectively degraded than by photolysis and TiO₂ only condition. With photocatalysis, 5 ㎎/ℓ simazine was degraded to approximately 90% within 30 min, and completely degraded after 150 min. Ionic byproducts such as NO₂?, NO₃?, and Cl? were detected from the photocatalysis of simazine, however, the recoveries were poor, indicating the presence of organic intermediates rather than the mineralization of simazine during photocatalysis. Two bioassays using V. fischeri and D. magna were employed to measure the toxicity reduction in the reaction solutions treated by both photocatalysis and photolysis. Simazine and its photocatalysis treated water did not exert any significant toxicity to V. fischeri, marine bacterium. However, the acute toxicity test using D. magna indicates that initial acute toxicity (EC?? = 57.30%) was completely reduced (EC?? = 100%) after 150 min under both photocatalysis and photoysis of simazine. This results indicates that photocatalysis and photolysis of simazine reduced the acute toxicity through mineralization.
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