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化学进展 2015, Vol. 27 Issue (8): 1123-1132 DOI: 10.7536/PC141233 前一篇   后一篇

• 综述与评论 •

电-Fenton及类电-Fenton技术处理水中有机污染物

林恒, 张晖*   

  1. 武汉大学环境工程系 武汉 430079
  • 收稿日期:2014-12-01 修回日期:2015-04-01 出版日期:2015-08-15 发布日期:2015-06-05
  • 通讯作者: 张晖 E-mail:eeng@whu.edu.cn
  • 基金资助:
    国家高技术研究发展计划(No. 2008AA06Z332)、武汉市科技局“科技攻关计划”(No. 201060723313)和中央高校基本科研业务费专项资金项目(2012205020207)资助
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Treatment of Organic Pollutants Using Electro-Fenton and Electro-Fenton-Like Process in Aqueous Solution

Lin Heng, Zhang Hui*   

  1. Department of Environmental Engineering, Wuhan University, Wuhan 430079, China
  • Received:2014-12-01 Revised:2015-04-01 Online:2015-08-15 Published:2015-06-05
  • Supported by:
    The work was supported by the National High?Tech R&D Program of China (No. 2008AA06Z332), Wuhan Science and Technology Bureau through “The Gongguan Project”(No. 201060723313), and the Fundamental Research Funds for the Central Universities (No. 2012205020207).
传统Fenton技术是一种广泛用于水体里有机污染物降解的高级氧化技术(advanced oxidation technologies, AOTs)。它利用Fenton试剂Fe2+与H2O2反应生成具有强氧化性的羟基自由基(·OH),从而降解有机污染物。基于相似的机理,过渡金属离子(Fe2+、Co2+和Ag+等)也可与过硫酸盐反应生成氧化能力较强的硫酸根自由基(SO4·-),而被称之为类Fenton技术。传统Fenton技术存在Fe2+投加量多,产生的铁污泥多等缺点,因此,有学者将Fenton技术与电化学技术结合,使Fe2+在阴极得以持续再生,这就是广为关注的电-Fenton技术。同样地,类Fenton技术也遇到与传统Fenton技术相似的问题。借鉴电-Fenton技术的成功应用,基于硫酸根自由基的类电-Fenton技术应运而生。本文在介绍电-Fenton和类电-Fenton技术原理的基础上,概括了电-Fenton和类电-Fenton技术的主要类型及其改进方法,并就值得深入研究的问题和热点趋势进行了展望。
关键词： 电-Fenton, 类电-Fenton, 羟基自由基, 硫酸根自由基, 有机污染物
Conventional Fenton process is one of the promising advanced oxidation technologies (AOTs) for the treatment of organic pollutants in water. In Fenton process, hydroxyl radical (·OH), a kind of strong oxidant, is formed through Fenton's reaction and then degrades organic pollutants. Similar to conventional Fenton process, transition metal ions (Fe2+, Co2+, Ag+, etc.) can also activate persulfate (PS) and generate sulfate radicals (SO4·-, SR). Sulfate radical is a powerful oxidant and can oxidize most of organic pollutants. This process is named as “Fenton-like process”. There are some disadvantages existed in conventional Fenton and Fenton-like process. For example, a high concentration of Fe2+ is required and a large amount of iron sludge is generated. In order to solve these problems, electro-Fenton and SR-based electro-Fenton-like processes are proposed. Fe2+ can be regenerated via cathodic reduction in electro-Fenton and electro-Fenton-like processes. Therefore, the Fe2+ concentration used in these processes is much lower than that in Fenton and Fenton-like processes. This paper provides an overview of mechanism and research progress of electro-Fenton and SR-based electro-Fenton-like processes. The types and improvements for electro-Fenton and electro-Fenton-like processes are summarized. Moreover, the prospects of the research areas meriting further investigation and developed trends are pointed out.

Contents
1 Introduction
2 Electro-Fenton process
2.1 Types of electro-Fenton processes
2.2 Improvements in electro-Fenton processes
3 Electro-Fenton-like process
3.1 Types of electro-Fenton-like processes
3.2 The effect of important parameters on electro-Fenon-like processes
3.3 Improvements in electro-Fenton-like processes
4 Comparison of oxidation mechanism
5 Conclusion and perspective

Key words: electro-Fenton, electro-Fenton-like, hydroxyl radicals, sulfate radicals, organic pollutants

中图分类号: 

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