Study on risk assessment of TiO_2 nano particles and environmental improvement utilizing TiO_2 photocatalysis

二氧化钛（TiO_2）纳米颗粒在二氧化钛光催化材料中的暴露量小于NIOSH允许剂量的1/50^，表明二氧化钛纳米颗粒在二氧化钛光催化材料中的暴露风险很低。分别制备了用于土壤和水净化的光催化材料，并证实了各系统对污染土壤和农业废水的净化效果，光催化材料具有一定的实用水平。

The exposure of titanium dioxide(TiO_2) nanosized particle from TiO_2 photocatalytic materials was less than 1/50^th of permissible dose in NIOSH, suggesting that the risk of nano-particle exposure from the TiO_2 materials is very low level. The photocatalytic materials for soil and water purification were prepared respectively, and it was confirmed that polluted soil and agricultural wastewater were cleaned up by each system with the photocatalytic material in a level of practical use.