Co-PbO_(2)电极电催化氧化SMX的降解研究  

Degradation of Sulfamethoxazole by Electrochemical Oxidation with Co-PbO_(2) Electrode

作　　者：杨收 韩东晖 万金泉 马邕文 王艳 张桂华[3] 闫志成 YANGShou;HAN Donghui;WAN Jinquan;MA Yongwen;WANG Yan;ZHANG Guihua;YAN Zhicheng(South China Institute of Environmental Sciences,Ministry of Ecology and Environment,Guangzhou 51065S,China;College of Environment and Energy,South China University of Technology,Guangzhou 510006,China;Huizhou Institute of Environmental Science,Huizhou 516000,China)

机构地区：[1]生态环境部华南环境科学研究所,广东广州510655 [2]华南理工大学环境与能源学院,广东广州510006 [3]惠州市环境科学研究所,广东惠州516000

出　　处：《环境科学与技术》2022年第2期37-46,共10页Environmental Science & Technology

基　　金：国家自然科学基金(21978102,31670585);国家重点研发计划项目(2018YFE0110400);中央级公益性科研院所基本科研业务费专项(PM-zx703-202004-153)。

摘　　要：作者采用电沉积法成功制备了Co掺杂改性Ti/TiO_(2)NTs/Co-PbO_(2)电极,通过SEM、XRD、XPS对其表面形貌、晶体结构和元素组成进行了表征。通过对比Ti/TiO_(2)NTs/Co-PbO_(2)电极在不同水质中电催化降解磺胺甲啊恶唑(SMX)的效果,分析发现该电极具有良好的电催化性能。探究了天然水基质对SMX降解的影响,发现水体中常见的无机阴离子Cl^(-)和HCO_(3)^(-)/CO_(3)^(2-)能够促进SMX的降解,而腐殖酸抑制SMX的降解。通过LC-MS对SMX及中间体产物进行鉴定,分析出其可能的降解路径有硝化、酰化、羟基化和S-N键直接断裂。A prospective Ti/TiO_(2)NTs/Co-PbO_(2)electrode has been successfully manufactured for the degradation of sulfamethoxazole(SMX).And the surface morphology,crystal structure and elemental states were characterized by SEM,XRD and XPS.By comparing the effect of Ti/TiO_(2)NTs/Co-PbO_(2)electrode on electrocatalytic degradation of SMX in different water quality,the electrode has a good electrocatalytic performance.The effects of natural water substrates on the degradation of SMX were investigated.It was found that the inorganic anions Cl^(-)and HCO_(3)^(-)/CO_(3)^(2-)could promote the degradation of SMX,while humic acid(HA)inhibited the degradation of SMX.The main intermediate products of SMX were identified by using LC-MS,and the possible degradation pathways mainly analyzed including nitration,acylation,hydroxylation,coupling and S-N bond cleavage.

关 键 词：Ti/TiO_(2)NTs/Co-PbO_(2)电极 电化学高级氧化 磺胺甲啊恶唑 降解机理 

分 类 号：X703[环境科学与工程—环境工程]