紫外助CWPO降解活性艳红X-3B工艺及降解路径  

Degradation of reactive brilliant red X-3B by UV-assisted catalytic wet peroxide oxidation

作　　者：涂盛辉[1] 刘婷[1] 朱细平[1] 洪小松[1] 梁海营[1] 彭海龙[1] 杜军[1] 

机构地区：[1]南昌大学资源环境与化工学院,江西南昌330031

出　　处：《南昌大学学报（理科版）》2015年第2期184-191,共8页Journal of Nanchang University(Natural Science)

基　　金：国家自然科学基金资助项目(No.51162022);国家自然科学基金资助项目(No.21201098)

摘　　要：光催化联合湿式催化过氧化氢氧化(UV-CWPO)处理活性艳红X-3B,发现联合处理比其单独处理具有较大的优势,其脱色率去除顺序依次为:光+催化剂+H2O2>催化剂+H2O2>光+H2O2>光+催化剂>催化剂>光>H2O2。通过单因素实验发现,最佳处理条件为:温度50℃,pH值为4,H2O2加入量为0.6mL,催化剂投加量为2.5g,并通过红外谱图及GC-MS谱图对染料降解路径进行分析,发现羟基自由基首先攻击偶氮键,染料随之褪色,同时生成了类苯胺类物质及酚类物质,但未能完全分解。Decolorization of reactive brilliant red X-3B was studied by combining the catalytic wet peroxide oxidation and photoeatalytic （CWPO）. This new complex method had greater advantage than single treatment. The decolorization rate was in the order of UV＋ CataLyst-P H2O2 〉 Catalyst ＋ H2O2 .〉 UV＋ H2O2 〉 UV＋Catalyst〉Catalyst〉UV〉H2O2. Single factor experiments showed that under the conditions of 50 ℃, pH = 4,0.6 mL H2 02, the decolorization rate was the best. IR and GC-MS were employed to investigate the degradation pathway. The azo bond （-N=N-） could firstly be attacked by the hydroxyl radical and other free radicals,resulting in the decoloration of the dyes and the formation of the aniline-and phenol-like compounds. The compounds could not be fully decomposed.

关 键 词：UV-CWPO 单因素实验 红外谱图 GC-MS谱图 降解路径 

分 类 号：X703[环境科学与工程—环境工程]