LaCoO3钙钛矿型催化剂非均相Fenton处理兰炭废水

摘要

以苯甲醇为溶剂,采用水热法制备LaCoO3钙钛矿型催化剂,研究LaCoO3钙钛矿型催化剂非均相Fenton处理兰炭废水的最佳工艺条件及催化机理.结果表明,在过氧化氢用量3 mL、LaCoO3钙钛矿型催化剂用量0.2 g、pH=4和反应温度25 ℃条件下,LaCoO3钙钛矿型催化剂非均相Fenton处理兰炭废水的COD去除率达到72.7%,通过自由基捕获剂叔丁醇的加入及一级动力学模型研究非均相Fenton过程机理.%Using benzyl alcohol as the solution,perovskite-type LaCoO3 catalyst was prepared by hydrothermal method.The best process condition and catalytic mechanism of heterogeneous Fenton reaction for degradation of semi-coking waste water over perovskite-type LaCoO3 catalyst were investigated.The results showed that COD removal rate of semi-coking waste water reached 72.7% under the optimal condition as follows:H2O2 amount 3 mL,perovskite-type LaCoO3 catalyst dosage 0.2 g,pH=4 and reaction temperature 25 ℃.The mechanism of heterogeneous Fenton reaction was studied by adding free radical scavenger t-butyl alcohol and first order kinetics model.