化工进展 ›› 2024, Vol. 43 ›› Issue (9): 5302-5308.DOI: 10.16085/j.issn.1000-6613.2023-1330

• 资源与环境化工 • 上一篇    下一篇

十二烷基甜菜碱对热活化过硫酸钠降解C.I.活性黑5的影响

安芳芳1(), 曹少磊1, 连增帅2, 舒大武1,3(), 张岩3, 李万新1, 韩博1   

  1. 1.河北科技大学纺织服装学院,河北 石家庄 050018
    2.天津工业大学纺织科学与工程学院,天津 300387
    3.河北省地质调查院,河北 石家庄 050000
  • 收稿日期:2023-08-03 修回日期:2023-12-19 出版日期:2024-09-15 发布日期:2024-10-08
  • 通讯作者: 舒大武
  • 作者简介:安芳芳(1993—),女,博士,研究方向为纺织品清洁染整加工。E-mail:fangfangan@hebust.edu.cn
  • 基金资助:
    河北省教育厅基金(QN2023090);大学生创新创业训练项目(X202310082090)

Effect of dodecyl betaine on the degradation of C.I. Reactive Black 5 by thermally activated sodium persulfate

AN Fangfang1(), CAO Shaolei1, LIAN Zengshuai2, SHU Dawu1,3(), ZHANG Yan3, LI Wanxin1, HAN Bo1   

  1. 1.College of Textile and Garments, Hebei University of Science and Technology, Shijiazhuang 050018, Hebei, China
    2.College of Textile Science and Engineering, Tiangong University, Tianjin 300387, China
    3.Hebei Institute of Geological Survey, Shijiazhuang 050000, Hebei, China
  • Received:2023-08-03 Revised:2023-12-19 Online:2024-09-15 Published:2024-10-08
  • Contact: SHU Dawu

摘要:

为诠释两性表面活性剂在热活化过硫酸钠(SPS)降解染料废水过程中的作用,以C.I.活性黑5(RB5)和十二烷基甜菜碱(BS-12)为例,探究了BS-12浓度、SPS浓度及温度对RB5降解性能的影响,揭示了RB5降解效果与自由基类型的关系,阐释了RB5可能的降解路径。结果表明:BS-12在染液中的临界胶束浓度(CMC)为0.03mmol/L;BS-12浓度影响RB5初始阶段脱色速率,但不改变最终脱色程度。与不含BS-12的染液相比,脱色10min时,加入0.5CMC BS-12可将脱色率提高10.45%,而5CMC BS-12却将脱色率降低了14.72%。在热活化SPS降解RB5体系中,染料降解归因于·SO4-和·OH协同作用的结果,但·SO4-占主导地位。在自由基的协同作用下,RB5中的—N̿    N—和C-N键被打开,形成含有苯环和萘环的中间产物,自由基浓度较低时,加入BS-12不利于RB5降解。

关键词: 活性染料, 十二烷基甜菜碱, 过硫酸钠, 硫酸根自由基, 废水

Abstract:

To illustrate the influence of zwitterionic surfactants on the degradation of dye wastewater by thermally activated sodium persulfate (SPS), C.I. Reactive Black 5 (RB5) and dodecyl betaine (BS-12) were identified as research subjects to study the effects of BS-12, SPS and temperature on the degradation of RB5. It revealed the relationship between the degradation effect of RB5 and the type of free radicals, and explained the possible degradation pathways of RB5. The results showed that the critical micelle concentration (CMC) of BS-12 in the dye solution was 0.03mmol/L. The concentration of BS-12 affected the rate of RB5 decolorization in the initial stage, but did not change the degree of final decolorization. Compared with the decolorization of the dye solution without BS-12 for 10min, the addition of 0.5CMC BS-12 increased the decolorization rate by 10.45%, while 5CMC BS-12 decreased the decolorization rate by 14.72%. In the thermally activated SPS-degraded RB5 system, dye degradation was attributed to the synergistic effect of ·SO4- and ·OH, but ·SO4- dominated. Under the synergistic action of free radicals, the —N̿    N— and C—N bonds in RB5 were opened to form intermediates containing benzene and naphthalene rings, and the addition of BS-12 was detrimental to the degradation of RB5 when the concentration of free radicals was low.

Key words: reactive dyes, dodecyl betaine, sodium persulfate, sulfate radicals, wastewater

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