摘要
研究了利用TiO_2薄层光催化降解久效磷农药的可行性。结果表明,0.65×10^(-4)mol/L的久效磷经375W中压汞灯照射60min,被完全光催化降解至PO_4^(3-);加入微量的Fe^(3+)或H_2O_2可提高久效磷农药的光解率;另外还研究了TiO_2薄层的附着量、反应液初始pH值、空气流量等因素对光催化降解的影响。光照80 h,TiO_2的光催化活性没有减弱,可连续使用。
The feasibility of photocatalytic degradation of monocrotophos pesticides using thin film of TiO_2 was studied. The results showed that 0.65×10^(-4) mol/L of monocrotophos can be completely photocatalytically degraded into PO_4^(3-) after 60min illumination with a medium pressure mercury lamp of 375 W, the photodegradation efficiency was raised respectively by adding a little amount of H_2O_2 or Fe^(3+). The effects of amount of TiO_2, initial pH and flow rate of air on the photocatalytic degradation of monocrotophos were also investigated. After 80 h illumination no significant loss of photocatalytic activity of TiO_2 was found.
出处
《环境科学研究》
EI
CAS
CSCD
1996年第1期49-53,共5页
Research of Environmental Sciences
基金
化工部科技攻关项目
