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Effects of TiO$_2$ Photodegradation on Leaching from Epoxy Resin Chemical in Water and Biological Toxicity  

Yeo Min Kyeong (경희대학교 환경학과)
Cho Eun Joung (경희대학교 환경학과)
Publication Information
Environmental Analysis Health and Toxicology / v.19, no.3, 2004 , pp. 271-278 More about this Journal
Abstract
Epoxy resins are mostly used as a molding material for drinking water tank. Bisphenol A is used at a constituent material for epoxy resins and is widely suspected to act as an endocrine disrupter. In this study, we investigated embryo hatching in zebrafish reared in water undergone leaching process of expoxy resin, and found a decreased survival rate. Bisphenol A eluted from epoxy resin in drinking water tank was completely degraded by TiO$_2$ photocatalysis. We detected 7.8 ng/ml of bisphenol A in epoxy resin tank, and observed that the concentration was undetectable after 48h photocatalysis over TiO$_2$. There was no toxicity in hatching rates in zebrafish and morphogenesis after photocatalysis. The effect of TiO$_2$ photocatalytic reactions on the catalase activities in the f]y stage of zebrafish was also examined. At 1 week post hatching, cataiase activities were higher both in the group of epoxy resin with 48 h TiO$_2$ photocatalysis and in the TiO$_2$ photocatalysis for 48 hours were higher than control group. However catalase activities of the treatment group of epoxy resin by TiO$_2$ photocatalysis for 48 hours were similar to control in 5 weeks post hatching fries. In conclusion, the toxicity of TiO$_2$ photocatalysis was not observed in this zebrafish.
Keywords
$TiO_2$ photodegradation; Bisphenol A; epoxy resin; development stage;
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Times Cited By KSCI : 1  (Citation Analysis)
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