TiO_2光催化降解含氰废水的影响因素的研究

Study of photocatalytic effect of TiO_2 on the degradation of cyanide

研究了二氧化钛在降解含氰废水中的光催化活性.通过实验探讨了二氧化钛的加入量、粒径和溶液透光性对光催化效果的影响.实验结果表明:二氧化钛的加入量、粒径和溶液的透光性都对光催化除氰的效果有影响,其中溶液的透光性是影响光催化效果的主要因素.在溶液透光率较大时,二氧化钛的加入量和粒径对除氰效果都有较明显的影响;而当溶液透光率较低时,二氧化钛的加入量和粒径的影响都是次要的.

The photocatalytic activities of TiO2 on degradation of cyanide solution have been studied with different particle size and different quantity of TiO2. The experiment results show that the particle size, the quantity of TiO2 and transparency of the solution all take the effect on the degradation of cyanide ~and that the transparency of the solution is the key factor affecting the cyanide degradation. In case of higher transparency of the solution, the particle size and quantity of TiO2 also have obvious influence on the effect of degradation of cyanide while with lower transparency, the particle size and quantity of TiO2 have little influence.