摘要
[目的]进一步对有机磷敌敌畏农药光催化降解的反应动力学进行研究。[方法]采用Sol-gel法在玻璃圆形反应器上镀制了TiO2膜,以紫外/二氧化钛膜(UV/TiO2)光催化氧化法来降解有机磷农药敌敌畏溶液,探讨了光催化反应时间、溶液的初始浓度对降解敌敌畏溶液的影响。[结果]由玻璃筒负载的TiO2膜对单一的敌敌畏溶液具有很好的光催化降解效果,TiO2膜具有很好的光催化活性。敌敌畏溶液的初始浓度越低,光催化降解效果越好,经90 min光催化氧化处理后,不同浓度敌敌畏的降解率都能达到90%以上。动力学研究表明,敌敌畏的降解速率对敌敌畏浓度为一级反应,反应速率方程为:Ct=C0e-0.0719t(mg/L)。[结论]光催化降解有机磷农药敌敌畏溶液具有很好的降解效果。
[ Objective] A further study on the kinetics of organophosphorus pesticide diehlorvos degradated by photo-catalytic oxidation was made, [ Method] The TiO2 film being prepared on glass-reactor with sol-gel method, UV/TiO2 photo-catalytic oxidation was applied to degrade the organophosphorus pesticide diehlorvos. The effects of some factors such as the photo-catalysis time, initial concentration of solution on the degradation of diehlorvos were discussed. [ Result] The TiO2 film loaded by grass had good photo-catalytic degradation effect on single diehlorvos solution and the TiO2 film had good photo-catalysis activity. The photo-catalytic degradation effect was better when the initial cohen, of diehlorvos solution was lower. The degradation rate of diehlorvos at different cohen, could reach above 90% after the diehlorvos was treated with photo-catalytic oxidation for 90 min, The kinetic study showed that the reaction between degradation rate of diehlorvos and its conch, was first order reaction and the reaction rate equation was Ct=C0e^-0.0719t（mg/L）. [ Conclusion] The degradation of organophosphorus Pesticide diehlorvos by photo-catalytic oxidation had good effect.
出处
《安徽农业科学》
CAS
北大核心
2008年第23期10152-10153,10190,共3页
Journal of Anhui Agricultural Sciences
