出版社：Korean Society of Environmental Health and Toxicology
摘要：TiO2 is widely used because it is non-toxic. Recently,however,nanometer size TiO2 particles (P-25) have been produced and used to increase the photo catalysis efficiency. Nanometer-sized TiO2 is efficient,but due to its small size (20~30 nm),it can flow into ecosystems and into cells. Thus,it may affect human health. Additionally,TiO2 can produce a second contaminant,OH-radical,which is a health risk for all living organisms during photo degradation reaction. Hence,when nanometer-sized TiO2 flows into natural streams and attaches to living organisms,it will create health risks. We investigated the biological toxicity of this condition in zebrafish embryos. We observed abnormal morphology,hatching rate,and measured the catalase activity to determine antioxidation at 100 post fertilization hours. Zebrafish were somewhat affected by TiO2 nanometer sized particles under UV-A (a condition similar to sunlight). Powdered TiO2 is toxic to the zebrafish fly. Even without light,TiO2 particles attached to embryos and flies,having an effect on both.
