Cu(Ⅱ)/Na_(2)SO_(3)体系降解磺胺甲恶唑的效能及机理  

Performance and Mechanism of Cu(Ⅱ)/Na_(2)SO_(3) System for Sulfamethoxazole Degradation

作　　者：王安郡 林治全 孙绍芳 厉鹏远 高明昌 邱立平 WANGAn-jun;LIN Zhi-quan;SUN Shao-fang;LI Peng-yuan;GAO Ming-chang;QIU Li-ping(School of Civil Engineering and Architecture,University of Jinan,Jinan 250022,China;School of Conservancy and Environment,University of Jinan,Jinan 250022,China;Shandong Province Engineering Technology Research Center for Water Purification Functional Material,Jinan 250022,China;School of Municipal and Environmental Engineering,Shandong Jianzhu University,Jinan 250101,China)

机构地区：[1]济南大学土木建筑学院,山东济南250022 [2]济南大学水利与环境学院,山东济南250022 [3]山东省功能材料水质净化工程技术研究中心,山东济南250022 [4]山东建筑大学市政与环境工程学院,山东济南250101

出　　处：《中国给水排水》2023年第7期95-101,共7页China Water & Wastewater

基　　金：国家自然科学基金资助项目(52100088);中国博士后科学基金资助面上项目(2022M711313);山东省自然科学基金资助项目(ZR2022ME220)。

摘　　要：利用Cu(Ⅱ)催化Na_(2)SO_(3)降解磺胺甲恶唑(SMZ),并探究降解效能及机理。结果表明,Cu(Ⅱ)/Na_(2)SO_(3)体系降解SMZ的最佳反应条件如下:pH为7、SMZ初始浓度为0.3 mg/L、Cu^(2+)浓度为0.10 mmol/L、Na_(2)SO_(3)浓度为0.50 mmol/L、温度为25℃,反应60 min后SMZ降解率达到61.3%。电子顺磁共振波谱结果和醇抑制剂实验结果证明,Cu(Ⅱ)/Na_(2)SO_(3)体系降解SMZ的主要活性物质是·OH和SO_(4)^(·-),其贡献率分别为31.6%和64.8%。虽然水体背景成分氯离子(Cl^(-))和碳酸氢根离子(HCO3-)对SMZ的降解起到一定抑制作用,但是Cu(Ⅱ)/Na_(2)SO_(3)体系对实际水体中SMZ仍有较好的降解效能。Sulfamethoxazole(SMZ)was degraded by Cu(Ⅱ)catalyzed Na_(2)SO_(3),and the degradation efficiency and mechanism were explored.The optimum reaction conditions of Cu(Ⅱ)/Na_(2)SO_(3) system for SMZ degradation were as follows:pH of 7,initial SMZ concentration of 0.3 mg/L,Cu^(2+)concentration of 0.10 mmol/L,Na_(2)SO_(3) concentration of 0.50 mmol/L and temperature of 25℃,and the degradation rate of SMZ reached 61.3% after 60 min reaction under these conditions.The results of electron paramagnetic resonance(EPR)and alcohol inhibitor experiments showed that·OH and SO_(4)^(·-)were the main active substances in Cu(Ⅱ)/Na_(2)SO_(3) system for SMZ degradation,and their contribution rates were 31.6% and 64.8%,respectively.Although the background ions such as chloride ion(Cl^(-))and bicarbonate ion(HCO_3^(-))inhibited the degradation of SMZ to some extent,the Cu(Ⅱ)/Na_(2)SO_(3) system still had a good performance for SMZ degradation in actual water bodies.

关 键 词：Cu(Ⅱ) Na_(2)SO_(3) 磺胺甲恶唑 硫酸根自由基 羟基自由基 

分 类 号：TU992[建筑科学—市政工程]