有机磷农药纳米TiO_2光催化降解反应器的优化设计

Optimization design of nano-TiO_2 photocatalytic degradation reactor for organic phosphorus pesticide

为了提高有机磷农药的TiO2光催化降解效率,以乙酰甲胺磷为降解对象,对光源、反应器结构及两者之间的结合方式、反应器材质等影响因素进行了试验,建立了可有效降解有机磷农药的纳米TiO2光催化反应器。结果表明:以石英材质加工冷阱部分、钠钙玻璃加工外层反应瓶的内照式反应器配以450W、主波长365nm的高压汞灯搭建的反应平台,经评估,当TiO2添加量为0.1g/L时,反应60min可使初始质量浓度为16mg/L的乙酰甲胺磷农药降解率达96.55%。该研究对有机磷农药光催化降解反应器的优化有一定的技术参考价值。

To improve the photo-catalytic degradation efficiency of organic phosphorus pesticide, taking acephate as a model pollutant, the effects of light source species, reactor configuration and materials, and the way of combining illuminator with the reactor on the degradation efficiency were investigated. A photo-catalytic reactor was developed and tested. The results indicated that the optimized reactor was with inside illuminated photo-catalytic reactor composed of quartz glass and light source of 450 W high-pressure mercury lamp with dominant wave length of 365 nm, which was favorable for the photo-degradation of acephate. The degradation rate of 16 mg/L acephate in the optimized reactor with 0.1 g/L titanium dioxide dose for 60 min was 96.55%. This research provides a reference for the optimization of the photo-catalytic degradation reactor used for organic phosphorus pesticide.