摘要：

为高效去除煤化工生化出水中的有机物，采用浸渍法制备非均相臭氧催化剂，用于催化臭氧氧化处理煤化工生化出水。先以模拟废水为处理对象，分析了催化剂载体种类、活性组分种类及配比、浸渍时间、焙烧温度及焙烧时间等因素对催化剂催化臭氧氧化效果的影响，确定最佳臭氧催化剂组分及制备工艺，之后对优化条件下制备的催化剂开展物性分析，分析了催化剂的表观形貌、微观结构及成分，最后采用实际生化出水开展了催化剂的稳定性评价。结果表明：采用浸渍法，在浸渍时间24 h、焙烧温度550 ℃、焙烧时间5 h条件下，以γ-Al₂O₃为载体、以n（Mn）∶n（Fe）∶n（Cu）=2∶1∶1作为活性组分配比制备得到的非均相臭氧催化剂具有较优的催化臭氧氧化性能，实验条件下将其用于催化臭氧氧化处理模拟废水中的难降解有机物，COD去除率高达64.6%；所制备催化剂具有较高的比表面积及介孔，用于中试处理实际煤化工生化出水时结构稳定，应用效果稳定，吨水处理运行费用为4.57元。

关键词: 生化出水, 臭氧催化剂, 制备工艺, 物性表征, 稳定性, 金属溶出率

Abstract:

In order to efficiently remove organic compounds from the biochemical effluent of coal chemical industry，a heterogeneous ozone catalyst was prepared by impregnation method for catalytic ozonation treatment of biochemical effluent of coal chemical industry. Firstly，taking simulated wastewater as the treatment object，the effect factors such as catalyst carrier type，active component type and ratio，impregnation time，calcination temperature，and calcination time on the catalytic ozonation effect of the catalyst were analyzed. The optimal ozone catalyst component and preparation process were determined. Then，the physical properties of the catalyst prepared under optimized conditions，including the apparent morphology，microstructure，and composition of the catalyst were analyzed. Finally，the stability evaluation of the catalyst was carried out using actual biochemical effluent. The results showed that using the impregnation method，under the conditions of impregnation time of 24 hours，calcination temperature of 550 ℃，and calcination time of 5 hours，the γ-Al₂O₃ as the carrier and n（Mn）∶n（Fe）∶n（Cu）=2∶1∶1 as the active component distribution ratio could get the catalyst，which had better catalytic ozonation performance. Under experimental conditions，it was used to catalyze the ozonation treatment of refractory organic compounds in simulated wastewater，with a COD removal rate of up to 64.6%. The prepared catalyst had a high specific surface area and mesopores. When used in pilot scale treatment of actual coal chemical biochemical effluent，the catalyst structure and the application effect were stable. The operating cost per ton of water was 4.57 yuan.

Key words: biochemical effluent, ozone catalyst, preparation process, characterization of physical properties, stability, metal dissolution rate

中图分类号: 

• TQ426

• X703.1