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高级氧化法测定化学需氧量的原理及应用

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齐蒙蒙, 韩严和, 孙齐. 高级氧化法测定化学需氧量的原理及应用[J]. 环境化学, 2019, (11): 2481-2497. doi: 10.7524/j.issn.0254-6108.2018122501
引用本文: 齐蒙蒙, 韩严和, 孙齐. 高级氧化法测定化学需氧量的原理及应用[J]. 环境化学, 2019, (11): 2481-2497. doi: 10.7524/j.issn.0254-6108.2018122501
shu
QI Mengmeng, HAN Yanhe, SUN Qi. Application of advanced oxidation technologies in the determination of chemical oxygen demand[J]. Environmental Chemistry, 2019, (11): 2481-2497. doi: 10.7524/j.issn.0254-6108.2018122501
Citation: QI Mengmeng, HAN Yanhe, SUN Qi. Application of advanced oxidation technologies in the determination of chemical oxygen demand[J]. Environmental Chemistry, 2019, (11): 2481-2497. doi: 10.7524/j.issn.0254-6108.2018122501
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高级氧化法测定化学需氧量的原理及应用

  • 1. 北京工业大学环境与能源工程学院, 北京, 100124;

  • 2. 北京石油化工学院环境工程系, 北京, 102617

    • 通讯作者: 韩严和, E-mail: hanyanhe@126.com ; 
  • 基金项目:

    北京市自然科学基金-市教委联合资助项目（KZ201810017024），国家自然科学基金（21677018）和石油石化污染控制与处理国家重点实验室开放课题（PC2017006）资助.

Application of advanced oxidation technologies in the determination of chemical oxygen demand

  • 1. College of Environmental and Energy Engineering, Beijing University of Technology, Beijing, 100124, China;

  • 2. Department of Environmental Engineering Beijing Institute of Petrochemical Technology, Beijing, 102617, China

    • Corresponding author: HAN Yanhe, hanyanhe@126.com ; 
  • Fund Project: Supported by the Joint Fund of the Beijing Municipal Natural Science Foundation and Beijing Municipal Education Commission (KZ201810017024), National Natural Science Foundation of China (21677018) and State Key Laboratory of Petroleum Pollution Control (PC2017006).

  • 摘要: 化学需氧量（COD）是衡量水体有机污染程度的首选指标，COD值越高，水体污染越严重.目前，COD测定方法常采用传统的国标法，但该方法存在耗时长、操作繁琐以及高毒性化学试剂导致的二次污染等问题，因此在实际应用中受到一定限制.近年来，测定COD的高级氧化法由于抛弃了传统的铬盐氧化剂，以氧化活性极强的·OH自由基为氧化剂，实现了有机污染物的彻底氧化，从而达到COD检测的目的.测定COD的高级氧化法主要包括：臭氧氧化、电化学氧化、光催化氧化以及光电催化氧化法，本文主要介绍了这些高级氧化法测定COD的原理和近些年的应用发展，并分析了各种测定方法的利弊.其中，电化学氧化以及光电催化法可直接以反应过程中引起的电学参数为分析信号来量化COD值，具有环保、快速、易于实现自动化和在线分析监测的优点，是目前最具前景的测定方法，也是今后COD检测研究的方向和热点.
    Abstract: Chemical oxygen demand (COD) is a preferred parameter for measuring the degree of organic pollution. The higher the COD value is, the more serious the water pollution is. At present, the method for determining COD often adopts the traditional standard method. However, this method has a few disadvantages that limit its applications, such as long time duration, complicated operation and secondary pollution caused by highly toxic chemical reagents. In recent years, advanced oxidation methods for COD determination including ozone oxidation, electrochemical oxidation, photocatalytic oxidation and photoelectrocatalytic oxidation use the highly reactive hydroxyl radical (·OH) as oxidant rather than the conventional oxidizing agents. Complete oxidation of organic pollutants and determination of COD have been achieved using these methods. This article is devoted in summarizing the principle and application for determination of COD by means of advanced oxidation methods and analyzing the advantages and disadvantages of each method. Given the characteristic of directly quantifying the COD values by electrical parameters during the reaction process of electrochemical oxidation and photoelectrocatalytic oxidation, advantages, such as environment friendliness, rapid analytical speed, online automatic monitoring are achieved. They are the most promising detection methods, and meanwhile, are the development directions and hotspot of COD determination in the future.
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  • 收稿日期:  2018-12-25

高级氧化法测定化学需氧量的原理及应用

    通讯作者: 韩严和, E-mail: hanyanhe@126.com ; 
  • 1. 北京工业大学环境与能源工程学院, 北京, 100124;
  • 2. 北京石油化工学院环境工程系, 北京, 102617
  • 收稿日期:  2018-12-25
基金项目:

北京市自然科学基金-市教委联合资助项目（KZ201810017024），国家自然科学基金（21677018）和石油石化污染控制与处理国家重点实验室开放课题（PC2017006）资助.

摘要: 化学需氧量（COD）是衡量水体有机污染程度的首选指标，COD值越高，水体污染越严重.目前，COD测定方法常采用传统的国标法，但该方法存在耗时长、操作繁琐以及高毒性化学试剂导致的二次污染等问题，因此在实际应用中受到一定限制.近年来，测定COD的高级氧化法由于抛弃了传统的铬盐氧化剂，以氧化活性极强的·OH自由基为氧化剂，实现了有机污染物的彻底氧化，从而达到COD检测的目的.测定COD的高级氧化法主要包括：臭氧氧化、电化学氧化、光催化氧化以及光电催化氧化法，本文主要介绍了这些高级氧化法测定COD的原理和近些年的应用发展，并分析了各种测定方法的利弊.其中，电化学氧化以及光电催化法可直接以反应过程中引起的电学参数为分析信号来量化COD值，具有环保、快速、易于实现自动化和在线分析监测的优点，是目前最具前景的测定方法，也是今后COD检测研究的方向和热点.

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