电芬顿降解罗丹明B机制研究  

Research on Degradation Mechanism of Rhodamine B by Electro-fenton

作　　者：康可佳[1] 刘侨博[1] 刘薇[1] 曾红云[1] 曲茉莉[1] 

机构地区：[1]黑龙江省环境保护科学研究院,黑龙江哈尔滨150056

出　　处：《现代农业科技》2015年第8期223-224,226,共3页Modern Agricultural Science and Technology

基　　金：国家科技重大专项"阿什河流域水污染控制技术经济与政策保障研究"(2012ZX07201003-04)

摘　　要：为考察电芬顿降解罗丹明B的机制,对初始p H值、温度、亚铁浓度的反应动力学进行研究。为测定最佳条件下过氧化氢的含量、羟基自由基的相对含量及罗丹明B随时间的降解产物,开展UV-vis及GC-MS研究。经GC-MS分析,检测出了12种物质,分别为已二酸、丙二酸、丁二酸、领苯二甲酸酐、苯甲氧基胺、乙二醇、2-羟基苯甲酸、苯甲酸、2-羟基戊二酸、邻苯二甲酸、间苯二甲酸、对苯二甲酸,分别提出了可能的降解机制。在最佳条件下,50 min后溶液中的过氧化氢含量为6 mmol/L,过氧化氢与羟基自由基的相对含量变化趋势相同。In order to study the degradation mechanism of rhodamine B by electro-fenton,reaction kinetics was studied in different initial pH value, temperature, concentration of Fe^2＋. Overall, the degradation followed the first-order reaction. In order to investigate the degradation mechanism of rhodamine B ,the GC-MS and UV-vis technologies were applied. The amount of hydrogen peroxide and the relative amount of hydroxyl radicals were determined to get a better understanding of it. From GC-MS analysis, 12 kinds of degradation products were detected. They were diacid ,malonic acid, succinic acid,led the dimethyl anhydride,methoxy benzene amine,ethylene glycol,2-hydroxy benzoic acid,benzoic acid,2-hydroxy glutaric acid, phthalic acid,isophthalic acid, terephthalic acid. On this basis, possible degradation mechanism was proposed.Under optimal conditions, after 50 min, the hydrogen peroxide content was 6 mmol/L, the relative amounts of hydrogen peroxide and hydroxyl radicals had the same trends.

关 键 词：罗丹明B 电芬顿 印染废水 

分 类 号：X703.1[环境科学与工程—环境工程]