催化湿式过氧化(CWPO)偶氮染料反应机理及降解历程研究  

Reaction mechanism and degradation course of azo dyes by catalytic wet peroxide oxidation(CWPO)

作　　者：张蕾[1] 马宏瑞[1] 

机构地区：[1]陕西科技大学资源与环境学院,西安710021

出　　处：《环境工程学报》2011年第9期2032-2038,共7页Chinese Journal of Environmental Engineering

基　　金：浙江省科技厅2009年度重大科技专项(2009C01032-4);陕西科技大学研究生创新基金资助项目

摘　　要：采用浸渍法制备出具有较高催化活性的催化剂CuO/γ-Al2O3,通过XRD、电镜等手段对催化剂进行了表征。降解了几种不同结构的偶氮染料,并通过改变CWPO的反应条件推断了其催化反应机理。采用紫外/可见分光光度计(UV-Vis)和傅里叶红外光谱仪(IR)等手段对染料降解过程进行跟踪和分析,对比染料处理前后紫外可见光谱与红外光谱图的变化,说明染料分子结构中的偶氮键发生断裂,破坏了分子结构的偶氮-苯环共轭发色体系,从而达到了脱色的目的。并借助水杨酸验证了CWPO体系中.OH的产生及CWPO反应机理。The catalyst CuO/γ-Al2O3 with high catalytic activity by impregnation was prepared,and were examined by XRD、SEM to characterize the catalyst.Azo dyes of several different structures were degraded,and the reaction conditions were changed to study the reaction mechanism of CWPO.The UV/Visible spectrophotometer（UV-Vis） and the Fourier transform infrared spectrometer（IR） were used to track and analyze the degradation process of the dyes.Compared the UV-Vis and IR spectra before and after wastewater treatment,indicating the structure of the azo dye molecules bond was broken,destroyed azo benzene conjugated chromophoric system of the molecular structure,so as to achieve the purpose of bleaching.The salicylic acid was used to infer the ·OH generation and reaction mechanism in the CWPO system.

关 键 词：CWPO CUO/Γ-AL2O3 反应机理 降解历程 羟基自由基(.OH) 

分 类 号：X703.1[环境科学与工程—环境工程]