磁性污泥基活性炭催化臭氧氧化去除布洛芬的研究

Study on the Ibuprofen Removal in Magnetic Sludge-based Activated Carbon Catalytic Ozonation

采用浸渍法制备了不同金属掺杂的磁性污泥活性炭(MSAC),考察了掺杂金属种类、催化剂和臭氧投量对MSAC催化臭氧氧化去除布洛芬(IBP)效能的影响,并通过测定活性物种含量研究了反应机制。结果表明,锰掺杂MSAC的催化活性最高,当臭氧和催化剂投量分别为1.0 mg/L和50.0 mg/L时,IBP的去除率为86.2%,比单独臭氧氧化工艺高28.3%。当催化剂投量由50.0 mg/L增加至100.0 mg/L时,IBP的去除率仅增加了2.3%;当臭氧投量由1.0 mg/L增加至3.0 mg/L时,IBP去除率由86.2%增加至99.7%。叔丁醇的加入显著降低了IBP去除率,活性物种定量分析结果进一步证实了IBP的快速去除主要是由于羟基自由基(·OH)的作用,过氧化氢在·OH产生过程中起引发剂作用。

Magnetic sludge-based activated carbon（MSAC）loaded with a series of metals are prepared via an impregnation method and effects of metal doping,catalyst and ozone dosage on ibuprofen（IBP）removal in MSAC catalytic ozonation are investigated,and the reaction mechanism is studied through the contents determination of reactive species. The results show that Mn doping MSAC has the highest catalytic activity and its IBP removal rate is 86.2 %,which is 28.3% higher than that in ozonation alone,when ozone and catalyst dosage are 1.0 mg/L and 50.0 mg/L. When catalyst dosage increases from 50.0 mg/L to 100.0 mg/L,IBP removal rate is only enhanced by 2.3% and it increases to 99.7% from 86.2% when ozone dosage increases from 1.0 mg/L to 3.0 mg/L. IBP removal rate decreases significantly after adding tert-butyl alcohol and the results of quantitative analysis of reactive species further confirms that the rapid removal of IBP is mainly due to the effect of hydroxyl radicals（·OH）,and hydrogen peroxide plays as initiator in the process of ·OH formation.