摘要：

以污水处理厂生物污泥和化学污泥等为原料制备出复合污泥基活性炭(CAC),与纯生物污泥基活性炭(BAC)和商品活性炭(AC)对比,分别考察了吸附、催化臭氧氧化和自由基抑制剂存在时催化臭氧氧化对水中罗丹明B的去除效果,进而研究了pH和臭氧投加量对CAC催化效能的影响。结果表明,三种活性炭均能提高臭氧氧化降解罗丹明B的效率,CAC催化效能最好。CAC催化臭氧氧化罗丹明B的反应遵循羟基自由基机理,随着pH的增大和臭氧投加量增加,CAC催化效能得到提高。

关键词: 污泥基活性炭, 臭氧氧化, 催化氧化, 罗丹明B

Abstract:

The sludge-based composite activated carbon(CAC) has been prepared,using biological sludge and chemical sludge in a wastewater treatment plant as raw materials,and compared with pure biological sludge-based activated carbon(BAC),and commercial activated carbon(CA). The removing effect of catalytic ozonation on Rh B in aqueous solution,in the presence of adsorption,catalystic ozonation and free radical inhibitor has been investigated. Furthermore,the effect of the dosages of Rh B in aqueous solution and ozone on CAC catalyzing capacity has been studied. The results show that all of the three kinds of activated carbon can improve the degradation efficiency of Rh B by catalytic oxidation. CAC has the best catalysis efficiency. The reaction of Rh B degradation by CAC catalytic ozonation follows the mechanism of hydroxyl radical. With the increase of pH and ozone dosage,the CAC catalysis efficiency increases.

Key words: sludged-based activated carbon, ozonation, catalytic oxidation, Rhodamine B

中图分类号: 

• X703.1