光催化降解甲胺磷影响因素的研究

A Study of Factors Affecting Photocatalytic Degradation of Methamidophos

进行了纳米TiO2 悬浮体系光催化降解甲胺磷的研究 .结果表明 ,只有在光照、催化剂和氧同时存在的条件下才能有效地进行光催化降解甲胺磷 .在甲胺磷浓度为 1×10 - 4mol·L- 1,反应液起始 pH =6.82 ,通空气量为 2L·min- 1,催化剂用量为 0 .4 g·L- 1,光照时间为 2h时 ,甲胺磷的降解率为 77.5% .同时还探讨了起始 pH值、甲胺磷起始浓度、光强、通气量 ,以及电子接受体H2 O2 、Fe3+等对光催化降解甲胺磷的影响 .实验结果表明光催化降解甲胺磷是可行的 .

The photocatalytic degradation of methamidophos in semiconductor suspension has been stu_died. It was found that the simultaneous presence of light, photocatalyst and oxygen was necessary. When the concentration of methamidophos is 1×10 -4 mol·L -1 , the original pH value of the reaction solution 6.82, the air_flow 2 L·min -1 , the amount of catalyst 0.4 g·L -1 , the radiation time 2 h, the degradation efficiency of methamidophos is 77.5%. Various factors, such as the original pH value, the original concentration of methamidophos, the light, the air_flow, the acceptor of electron H 2O 2、Fe 3+ that influence the photocatalytic degradation of methamidophos, have been studied, the photocatalytic degradation of methamidophos proved to be feasible.