电-高锰酸钾-过一硫酸盐体系的构建及对偶氮染料活性黄K-RN的降解  

Construction the process of electro-potassium permanganateperoxymonosulfate and degradation of azo dye Reactive Yellow 3

作　　者：张铭阳 孙志华[1] 陈翠忠 王健康[1] 姬钰 赵纯[2,1] ZHANG Mingyang;SUN Zhihua;CHEN Cuizhong;WANG Jiankang;JI Yu;ZHAO Chun(College of Water Conservancy&Architectural Engineering,Shihezi University,Shihezi,832003,China;College of Environment and Ecology,Chongqing University,Chongqing,400045,China;College of Aerospace and Civil Engineering,Harbin Engineering University,Harbin,150001,China)

机构地区：[1]石河子大学水利建筑工程学院,石河子832003 [2]重庆大学环境与生态学院,重庆400045 [3]哈尔滨工程大学航天与建筑工程学院,哈尔滨150001

出　　处：《环境化学》2024年第12期4216-4227,共12页Environmental Chemistry

基　　金：石河子大学高层次人才科研启动项目(RCZK202314);国家自然科学基金(22076015,52370126);兵团区域创新引导计划项目(2022BB007)资助.

摘　　要：为解决水中偶氮染料难降解的问题,构建了电-高锰酸钾-过一硫酸盐体系(E-PM-PMS体系),以活性黄K-RN为目标偶氮染料,考察了PM浓度、PMS浓度、电流密度、初始pH、水体背景对活性黄K-RN降解的影响.结果表明,E、PM、PMS之间有明显的协同作用.在PM浓度为0.8 mmol·L^(−1)、PMS浓度为1 mmol·L^(−1)、电流密度为26.29 mA·cm^(−2)、初始pH为6、硫酸钠浓度为50 mmol·L^(−1)的条件下,反应20 min对活性黄K-RN的降解率为95.8%,反应120 min对活性黄K-RN的矿化率为47.96%.电子自旋共振(ESR)测试证明,E-PM-PMS体系在降解活性黄K-RN的过程中产生了SO_(4)^(·−)、·OH、^(1)O_(2)和^(·)O_(2)^(−)等活性氧物种,E-PM-PMS体系降解活性黄K-RN是以自由基为主导的降解过程.此外,考察了E-PM-PMS体系对不同染料有显著的降解效果.该研究提出的E-PM-PMS体系为偶氮染料的降解提供了理论依据和技术参考.The electro-potassium permanganate-peroxymonosulfate(E-PM-PMS)process was constructed to address the challenge of the recalcitrant degradation of azo dyes in water.In this study,Reactive Yellow 3 azo dye was as the degradation target,and the effects of PM concentration,PMS concentration,current density,initial pH,and aqueous background were investigated,the results indicated a clear synergistic effect between E,PM,and PMS.The degradation rate of Reactive Yellow 3 after 20 minutes of reaction was 95.8%,and the mineralization rate of Reactive Yellow 3 after 120 minutes of reaction was 47.96%,under the experimental conditions:PM concentration was 0.8 mmol·L^(−1),PMS concentration was 1 mmol·L^(−1),current density was 26.29 mA·cm^(−2),initial pH was 6,and Na2SO4 concentration was 50 mmol·L^(−1).Moreover,the E-PM-PMS process produced reactive oxygen species,including SO_(4)^(·−),·OH,^(1)O_(2),and^(·)O_(2)^(−),which was detected by the electron spin resonance(ESR)test.The main drivers of degradation of Reactive Yellow 3 were free radicals in the E-PM-PMS process.In addition,the significant effects was shown by degrading various dyes in the E-PM-PMS process.The proposed E-PM-PMS process offers a theoretical foundation and technical guidance for the degradation of azo dyes.

关 键 词：电化学 高锰酸钾 过一硫酸盐 偶氮染料 活性黄 K-RN. 

分 类 号：X-1[环境科学与工程] O6[理学—化学]