H_2O_2处理酸性大红废水催化剂的研究  

STUDY ON CATALYSTS OF H2O2 TREATING ACID SCARLET DYE WASTEWATER

作　　者：邱祖民[1] 刘小成[1] 

机构地区：[1]南昌大学环化学院,南昌330029

出　　处：《安全与环境学报》2003年第5期50-53,共4页Journal of Safety and Environment

基　　金：江西省教委重大课题资助项目(编号:200002)

摘　　要：对H2O2多相催化氧化处理酸性大红工艺的催化剂进行了研究,探讨了催化剂的制备条件与催化性能间的关系。结果表明,过渡金属氧化物中CuO有较高的催化活性,Mn、Ni、Zn等金属的氧化物几乎无催化活性;采用沉淀法制备的催化剂的催化活性要比采用浸渍法制备的高。在较佳条件下制备的催化剂对于COD为632.5mg/L的酸性大红废水,在H2O2投加量为5mL/L时,COD去除率大于70％,色度去除率达98％。同时考察了该催化剂的稳定性,试验结果表明,催化剂经过多次使用后仍保持较高的催化活性。此外。该催化剂处理其他染料废水也有很好的效果。This paper has done an experimental research on the use of H2O2 with heterogeneous catalysts in processing the soluble Azo-dye (Acid Scarlet GR) sewage. In order to screen out the most efficient catalyst, the author has prepared a series of catalysts with transition metals by means of impregnation and precipitation. As is known to environmental science workers, it is a difficult problem to dissolve the sewage with high concentration but low-degradable organisms. To solve this problem, a method known as the catalytic oxidation technology, has been widely studied in the sewage treating area. In our experiments, we have tried a more efficient method than the catalytic oxidation technology, that is, the impregnation and precipitation of CuO/Al2O3 as our catalyst, which makes it possible to totally eliminate the colority of the acid scarlet aqueous solution and better chemical oxygen demand (COD) removal under the mild working conditions. The results of our experiments show that the catalysts prepared by precipitation are much more efficient than those prepared by the catalytic oxidation technology. We have also studied the effect of the catalyst preparing conditions, such as different precipitators, dosage of precipitators and precipitation temperature, calcined temperature, aging time, calcined time on catalytic activity. The COD removal ratio and decolorization ratio prove to be as high as 76. 7% and 99. 4% respectively when the catalysts under the optimum conditions were prepared. In order to test the stability of the catalyst, seven testing runs were conducted with the same catalyst. The results show that the catalyst reactivity decreased slowly during the successive batch tests. But the activity of the catalyst can be restored by recalcinating it in the air at 450 癈 for 3 h. This supports the evidence of the stability of the catalyst. The prepared catalyst used in our experiments to treat other dye aqueous solutions is also efficient in view of COD and colority removal. Thus, it is shown that the catalyst prep

关 键 词：环境工程 多相催化氧化 酸性大红 沉淀法 

分 类 号：X703.5[环境科学与工程—环境工程]