【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%。更多还原

【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 m L/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.更多还原