均相光催化氧化去除水中甲草胺的研究

Research on the Removal of Alachlor by Homogeneous Photocatalytic Oxidation Process

摘要: 均相光催化氧化去除水中甲草胺的研究采用UV/H₂O₂体系对水中的甲草胺进行光催化降解研究,讨论了初始pH值、进水温、过氧化氢投量和甲草胺的初始质量浓度等条件对光催化降解甲草胺效率的影响.结果表明,在各种试验条件下,UV/H₂O₂体系对甲草胺均有较高的去除率,且光解10 min就可将甲草胺的质量浓度降低99.3%,反应体系中羟基自由基的浓度是甲草胺去除的决定性因素;室温条件下,pH值为7.0,H₂O₂投量为70 mg/L为光催化降解甲草胺的最佳反应条件.

Abstract: In the study,UV/H2O2 photodegradation system was adopted in the removal of alachlor in water,and the effect of pH,influent temperature,dose of H2O2,influent concentration of alachlor and other conditions on the photodegradation efficiency were discussed.The results indicated that under different experimental conditions,alachlor got high removal efficiency by UV/H2O2 photodegradation systems,and the removal of alachlor could reach 99% more by the time of 10 min.The concentration of ·OH from photodecompose of of H₂O₂were key factors that affected reaction rateand the conditions of 2 0℃, pH=7.0 and 70mg/L of H₂O₂were optimum photodegradation conditions of alachlor.