摘要
印染废水中的有机染料处理在水处理技术中长久以来都是一大难题,电/高锰酸钾/过一硫酸盐体系(EC/PM/PMS体系)可以高效地降解活性黄K-RN等难降解有机污染物,但其降解机制还尚未明确,且锰类物质能否活化PMS产生活性物质以及PMS活化机理还需进一步探究。因此,本文研究了EC/PM/PMS体系在降解印染废水时活性物质的类别和产生途径,同时确定了锰类物质在其中的作用机理和PMS的活化过程。结果表明,EC/PM/PMS体系是一种包含自由基氧化和非自由基氧化的复合体系,体系中由PM还原生成五价锰、六价锰和无定形二氧化锰活化PMS。此外,明确了活性氧类自由基氧化是活性黄K-RN降解的主要路径,占比为95.3%,电极直接氧化占比2.1%,非自由基氧化占比仅为2.6%。
The removal of organic dyes in printing and dyeing wastewater has been a difficult problem in water treatment technology for a long time.Electricity/potassium permanganate/peroxymonosulfate(EC/PM/PMS)system can efficiently degrade refractory organic dyes,such as reactive yellow K-RN.However,the degradation mechanism,especially the activation mechanism of Mn in relation to PMS,remains unclear.Therefore,this paper studied the types and production pathways of active substances in EC/PM/PMS system,and determined the action mechanism of Mn and the activation process of PMS during printing and dyeing wastewater treatment.Results showed that EC/PM/PMS system is a composite system including free radical oxidation and non-free radical oxidation.During this process,PMS activates Mn(Ⅴ),Mn(Ⅵ)and amorphous manganese dioxide,resulting in the reduction of PM.In addition,reactive oxygen radical oxidation is the main degradation path accounting for 95.3%,while electrode direct oxidation and non-free radical oxidation account for 2.1%and 2.6%,respectively.
作者
马超
孙志华
王蕾
姬钰
陈翠忠
王健康
赵纯
MA Chao;SUN Zhihua;WANG Lei;JI Yu;CHEN Cuizhong;WANG Jiankang;ZHAO Chun(College of Water Conservancy&Architectural Engineering,Shihezi University,Shihezi 832003,Xinjiang,China;College of Environment and Ecology,Chongqing University,Chongqing 400045,China;College of Aerospace and Civil Engineering,Harbin Engineering University,Harbin 150001,Heilongjiang,China)
出处
《化工进展》
EI
CAS
CSCD
北大核心
2024年第10期5958-5968,共11页
Chemical Industry and Engineering Progress
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)
兵团区域创新引导计划(2022BB007)。
关键词
电化学
高锰酸钾
过一硫酸盐
活性黄K-RN
自由基
electrochemical
potassium permanganate
peroxymonosulfate
reactive yellow K-RN
radical
