工业水处理 ›› 2022, Vol. 42 ›› Issue (6): 174-179. doi: 10.19965/j.cnki.iwt.2021-0868

• 试验研究 • 上一篇    下一篇

BDD阳极去除水中阿特拉津的特性及机理研究

贾伟建1, 朱化雨2(), 王德生1, 蒋佰果1   

  1. 1. 潍坊市市政工程设计研究院有限公司, 山东 潍坊 261000
    2. 临沂大学化学化工学院, 山东 临沂 276000
  • 收稿日期:2022-03-23 出版日期:2022-06-20 发布日期:2022-06-22
  • 作者简介:

    贾伟建(1991— ),硕士,工程师

    朱化雨,教授。E-mail:

Characteristics and mechanism of atrazine removal from water by BDD anode

Weijian JIA1, Huayu ZHU2(), Desheng WANG1, Baiguo JIANG1   

  1. 1. Weifang Municipal Engineering Design and Research Institute Co. , Ltd. , Weifang 261000, China
    2. School of Chemistry and Chemical Engineering, Linyi University, Linyi 276000, China
  • Received:2022-03-23 Online:2022-06-20 Published:2022-06-22

摘要:

阳极氧化技术作为最简单的高级氧化技术,可有效去除水中残留的除草剂等持久性有机污染物。利用硼掺杂金刚石(BDD)电极作为阳极构建了阳极氧化体系,研究了电解质种类、浓度和电流密度等参数对BDD阳极降解三嗪类除草剂阿特拉津效能的影响规律,并利用UPLC-MS/MS对阿特拉津的降解产物进行了定性分析。结果表明,在NaCl投加量为0.05 mol/L和电流密度为12 mA/cm2时,处理90 min后,BDD阳极基本可实现对阿特拉津的完全去除;处理300 min后,阿特拉津的矿化率可达(56±2.4)%。BDD阳极氧化体系共检出6种阿特拉津降解的主要产物,主要反应类型为脱氯-羟基化反应、脱氯-脱烷基化反应、侧链的烷基氧化反应、脱氢-烯化反应。

关键词: 阳极氧化, BDD阳极, 阿特拉津, 降解机理

Abstract:

As one of the simplest advanced oxidation technologies,anodic oxidation can effectively remove persistent organic pollutants,such as herbicides. An anodic oxidation system using a boron-doped diamond(BDD) anode was constructed to analyze the effects of electrolyte types,concentration and current density on the degradation efficiency of atrazine,which was a triazine herbicide. Also,the products of atrazine in BDD anodic oxidation system were qualitatively analyzed by UPLC-MS/MS. The results showed that atrazine could be completely removed by BDD anode after the reaction for 90 min with NaCl of 0.05 mol/L and current density of 12 mA/cm2. After 300 min anodic oxidation,the mineralization rate of atrazine could reach(56±2.4)%. Six main products of atrazine were found in BDD anodic oxidation system. The main reaction types were dechlorination-hydroxylation,dechlorination-dealkylation,side chain alkylation oxidation,dehydrogenation-alkylene reaction.

Key words: anodic oxidation, BDD anode, atrazine, degradation mechanism

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