Epoxy resins are mostly used as a molding material for drinking water tank Bisphenol A is used as a constituent material for epoxy resins and is widely suspected to act as an endocrine disruptor in this study, we investigaed 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 TiO₂photocatalysis We detected 7 8 ng/ml of bisphenol A in epoxy resin tank and observed that the concentration was undetectable after 48h photocatalysis over TiO₂ There was no toxicity in hatching rates in zebrafish and morphogenesis after photocatalysis The effect of TiO₂ photocatalytic reactions on the catalase activities in the fly stage of zebrafish was also examined At I week post hatching. catalase activities were higher both in the group of epoxy resin 10 with 48 h TiO₂photocatalysis and in the TiO₂photocatalysis for 48 hours were higher than control group However catalase activities of the treatment group of epoxy resin by TiO₂photocatalysis for 48 hours were similar to control in 5 weeks post hatching fries in conclusion, the toxicityty of TiO₂photocatalysis Was not observed in this zebrafish
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