Abstract:

The LaCoO₃ perovskite catalyst was prepared through the sol-gel method and characterized in this study. Then it was employed for the UV-catalytic wet hydrogen peroxide oxidation of the membrane concentrate of coal chemical wastewater. The effects of various factors on the oxidation efficiency were investigated by single-factor experiments. When the dosage of H₂O₂ was 1.2 mL/L, the catalyst was 1.8 g/L, the reaction temperature was 120℃, the reaction pressure was 0.5 MPa, pH was 3, and the reaction time was 60 min, the removal rates of COD, TOC and UV₂₅₄ reached 89.7%, 84.6% and 97.2%, respectively.

Key words: UV-catalytic wet hydrogen peroxide oxidation, LaCoO₃, membrane concentrate

摘要：

采用溶胶-凝胶法制备LaCoO₃钙钛矿型催化剂用于紫外-催化湿式过氧化氢氧化煤化工废水膜浓缩液，表征了催化剂的结构，并考察了各因素对催化氧化效果的影响。结果表明，当H₂O₂投加量1.2 mL/L，催化剂投加量0.8 g/L，反应温度120℃，反应压强0.5 MPa，pH=3，反应时间60 min时，COD的去除率为89.7%，TOC的去除率为84.6%，UV₂₅₄的去除率为97.2%。

关键词: 紫外-催化湿式过氧化氢氧化, LaCoO₃, 膜浓缩液

CLC Number: 

• X703