化工进展 ›› 2024, Vol. 43 ›› Issue (10): 5958-5968.DOI: 10.16085/j.issn.1000-6613.2023-1697

• 资源与环境化工 • 上一篇    

电/高锰酸钾/过一硫酸盐体系降解活性黄K-RN及其机理

马超1,2(), 孙志华1(), 王蕾1(), 姬钰3, 陈翠忠1, 王健康1, 赵纯1,2   

  1. 1.石河子大学水利建筑工程学院,新疆 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,黑龙江 哈尔滨 150001
  • 收稿日期:2023-09-25 修回日期:2024-01-05 出版日期:2024-10-15 发布日期:2024-10-29
  • 通讯作者: 孙志华,王蕾
  • 作者简介:马超(1999—),男,硕士研究生,研究方向为高级氧化技术。E-mail:641345455@qq.cn
  • 基金资助:
    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)

Degradation of reactive yellow K-RN by electricity/potassium permanganate/peroxymonosulfate system and its mechanism

MA Chao1,2(), SUN Zhihua1(), WANG Lei1(), JI Yu3, CHEN Cuizhong1, WANG Jiankang1, ZHAO Chun1,2   

  1. 1.College of Water Conservancy & Architectural Engineering, Shihezi University, Shihezi 832003, Xinjiang, China
    2.College of Environment and Ecology, Chongqing University, Chongqing 400045, China
    3.College of Aerospace and Civil Engineering, Harbin Engineering University,Harbin 150001, Heilongjiang, China
  • Received:2023-09-25 Revised:2024-01-05 Online:2024-10-15 Published:2024-10-29
  • Contact: SUN Zhihua, WANG Lei

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%。

关键词: 电化学, 高锰酸钾, 过一硫酸盐, 活性黄K-RN, 自由基

Abstract:

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.

Key words: electrochemical, potassium permanganate, peroxymonosulfate, reactive yellow K-RN, radical

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