Fe-MnO_x催化过氧化氢氧化酸性橙-7研究  

The Catalytic Oxidation of Acid Orange 7 by H_2O_2 Using Fe-Mnoxas a Heterogeneous Fenton-Like Catalyst

作　　者：丁超[1] 张静[1] 万子谦[1] 张古承 陈云宇[2] 

机构地区：[1]四川大学建筑与环境学院,四川成都610065 [2]大庆油田有限责任公司,黑龙江大庆163000

出　　处：《水处理技术》2016年第2期30-33,共4页Technology of Water Treatment

基　　金：国家自然科学基金(51008052);教育部新世纪优秀人才支持计划(NCET-11-0082)

摘　　要：采用共沉淀法制备Fe-MnO_x催化剂进行催化过氧化氢氧化降解酸性橙-7的研究,考察了酸性橙-7初始含量、催化剂投加量、溶液初始pH对酸性橙-7降解的影响,并探讨了反应机理。结果表明,H_2O_2的浓度为3.7 mmol/L、Fe-MnO_x投加量100 mg/L时,当酸性橙-7初始质量浓度高于15 mg/L时去除率随酸性橙-7含量升高而降低;酸性橙-7初始量浓度低于15 mg/L时去除率随酸性橙-7含量升高而升高。溶液初始pH对酸性橙-7的去除有显著影响,pH为2时酸性橙-7有最佳去除率42.4%。当反应溶液中加入羟基自由基抑制剂叔丁醇后,酸性橙-7的去除率明显降低,证明体系中的主要氧化物种为羟基自由基。Influence of different reaction conditions on the results of Fe-MnO_x as a heterogeneous Fenton-like catalyst used in the oxidation of acid orange7（AO7） were studied and the mechanism of the reaction was discussed.The results showed that when the concentration of H_2O_2 was 3.7 mmol/L,the dosage of Fe-MnO_x was 100 mg/L,the optimum initial mass concentration of AO7 was 15 mg/L.When the mass concentration of AO7 is higher than 15mg/L,the degradation rate decreased while the content of AO7 increased.When the mass concentration is lower than 15 mg/L,the degradation rate increased while the content of AO7 increased.The initial pH had prominent effect on the degradation of AO7,a best degradation rate of 42.4%was presented at pH=2.That hydroxyl radical was the main active specie in the oxidation process was demonstrated through an experiment by adding tert butyl alcohol（TBA）,which is an inhibitor of hydroxyl radical,into the reaction solution.

关 键 词：铁锰催化剂 酸性橙-7 过氧化氢 羟基自由基 

分 类 号：TQ031.7[化学工程] X791[环境科学与工程—环境工程]