化学学报 ›› 2019, Vol. 77 ›› Issue (3): 205-212.DOI: 10.6023/A18120486 上一篇    下一篇

研究展望

典型无机含氧酸自由基的特性

王晨a, 陈瑞a, 宋林a, 张乃东a,b   

  1. a 大连海事大学环境科学与工程学院 大连 116026;
    b 哈尔滨工业大学城市水资源与水环境国家重点实验室 哈尔滨 150090
  • 收稿日期:2018-12-06 出版日期:2019-03-15 发布日期:2019-02-14
  • 通讯作者: 张乃东 E-mail:zhangnd@aliyun.com
  • 作者简介:王晨,1994年出生于安徽省潜山县,硕士在读.2012年至2016年在江西农业大学完成本科学位;2016年至今就读于大连海事大学环境工程专业.目前主要研究方向为高级氧化技术处理有机污水,通过光催化、过渡金属催化等方法活化过氧化物对污水进行降解,并研究其降解过程中自由基的相互转化规律.在国际学术刊物上发表SCI论文三篇;张乃东,博士,教授.主要研究方向为水处理高级氧化技术及原理.主持并参与了国家863计划、国家自然科学基金、大连市科技计划等科研项目.2004年至今在大连海事大学环境学院工作.
  • 基金资助:

    项目受国家自然科学基金(No.21673061)和哈尔滨工业大学城市水资源与水环境国家重点实验室开放基金项目(No.QAK201503)资助.

Characteristics of Some Typical Inorganic Oxyacid Free Radicals

Wang Chena, Chen Ruia, Song Lina, Zhang Naidonga,b   

  1. a College of Environmental Science and Engineering, Dalian Maritime University, Dalian 116026, China;
    b State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China
  • Received:2018-12-06 Online:2019-03-15 Published:2019-02-14
  • Supported by:

    Project supported by the National Natural Science Foundation of China (No. 21673061) and the Open Project of the State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology (No. QAK201503).

碳酸自由基、硝酸自由基、磷酸自由基和硫酸自由基是化学反应的重要中间体,都具有氧化性,对污染物在自然和人为环境中的迁移转化会产生重要的影响.文中较为详细地介绍这几种自由基的电极电位、产生方式、检测方法及与有机物的反应方式.总结四种自由基的特性及与有机物的反应方式可发现,四种自由基和羟自由基电极电位不同,导致它们和有机物反应速率的不同;碳酸自由基并不是羟自由基去除剂,对于一些容易被氧化的化合物,碳酸自由基氧化效果比羟自由基好;四种自由基均可由羟自由基转化而来,并且这四种自由基和羟自由基与有机物反应方式基本一致,都通过电子转移、夺氢和加成的方式进行.可以预测四种自由基和羟自由基降解有机物的机理将非常相似,今后应研究四种自由基与羟自由基相互转化的规律,以及与代表性有机物的反应机理.

关键词: 碳酸自由基, 硝酸自由基, 磷酸自由基, 硫酸自由基, 羟自由基

Carbonate radical, nitrate radical, phosphate radical and sulfate radical are all important intermediates of chemical reactions with oxidizing ability. They have a significant effect on the transfer of pollutants in natural environment. In this review, the redox potential, modes of production, detection methods of these radicals and the mechanisms of their reactions with organic compounds are introduced. It can be found that:these four radicals have different reaction rates with organic compounds because of their various redox potential; Carbonate radical is not a scavenger of hydroxyl radical. For some easily oxidized compounds, carbonate radical shows higher oxidizing ability than hydroxyl radical; Hydroxyl radicals can be converted into other four types of radicals. Meanwhile, these four types of radicals react with organic matters by electron transfer, hydrogen abstraction and addition, which is basically consistent with hydroxyl radicals. It can be predicted that the mechanism of organic compounds degradation by these four types of free radicals is similar with that of hydroxyl radicals. In the future, it is necessary to study the mutual conversion principles between these free radicals and hydroxyl radicals and the degradation mechanism of these radicals when reacting with some representative organic compounds.

Key words: carbonate radical, nitrate radical, phosphate radical, sulfate radical, hydroxyl radical