Cl^(-)和pH对高级氧化工艺去除含盐废水中有机物的影响及机理  

Effects and mechanism of Cl^(-) and pH on organic matter removal in saltcontaining wastewater treatment by advanced oxidation processes

作　　者：刘宇程[1,2] 杨冰 李沁蔓 马丽丽 李玲丽[1,2] 陈明燕 LIU Yucheng;YANG Bing;LI Qinman;MA Lili;LI Lingli;CHEN Mingyan(College of Chemistry and Chemical Engineering,Southwest Petroleum University,Chengdu 610500,China;Institute of Industrial Hazardous Waste Disposal and Utilization,Southwest Petroleum University,Chengdu 610500,China)

机构地区：[1]西南石油大学化学化工学院,成都610500 [2]西南石油大学工业危废处置与资源化利用研究院,成都610500

出　　处：《环境工程学报》2021年第5期1487-1499,共13页Chinese Journal of Environmental Engineering

基　　金：国家自然科学基金资助项目(21707111);四川省科技计划项目(2020JDTD0018,2019YJ0320);西南石油大学科研“启航计划”项目(2017QHZ018)2017QHZ018)。

摘　　要：高级氧化技术(AOPs)在削减(或去除)工业废水中的有机物方面具有广泛应用。氯离子(Cl^(-))是含盐工业废水中最主要的阴离子,会影响AOPs处理有机污染物过程中的氧化去除效率、卤代有机副产物的生成。然而,实践中Cl^(-)的影响常被忽视。针对基于羟基自由基(·OH)、硫酸根自由基(SO4-·)和非自由基途径3种不同类型的AOPs,从Cl^(-)与不同自由基(·OH、SO+4-·)的反应及正逆反应速率常数、Cl^(-)浓度与pH的复合影响两方面,探讨了Cl^(-)对3类AOPs去除废水中有机物的影响和机理。比较了3类AOPs工艺处理含盐废水适用的Cl^(-)理论浓度的高低差异,提出通过调控pH改变主要活性氧化物质、选择不同的氧化方式等途径减弱Cl^(-)对有机物去除效率的抑制、减少卤代有机副产物的生成,以期为AOPs工艺处理含盐废水的应用和相关研究提供参考。Advanced oxidation processes(AOPs)have been widely applied in industrial wastewater treatment for organic compounds removal.Chloride ion(Cl^(-))is the main anion in most salt-containing industrial wastewater.Studies have shown that Cl^(-)has a significant impact on the removal efficiency and the formation of halogenated organic by-products in the treatment of organic pollutants by AOPs,yet it is often overlooked in practice.This review focuses on three different types of AOPs based on hydroxyl radicals(·OH),sulfate radicals(SO4-·),and non-radical pathways.The effects and mechanism of Cl^(-)on the removal of organic compounds from wastewater by these three kinds of AOPs were discussed based on a series of reactions and forward/reverse reaction rate constants between Cl^(-)and different free radicals(·OH,SO4-·),and the combined influences of Clconcentration and pH condition.The differences of theoretically appropriate Cl^(-)concentration ranges for AOPs applied to treat saline wastewater were compared.Regulating pH conditions to change the main reactive oxidant species and choosing different oxidation methods are proposed to reduce the inhibition of Cl^(-)on organic compound removal efficiency and decrease the generation of halogenated organic by-products.This review provides theoretical support for the application and related research of AOPs in the treatment of salt containing wastewater.

关 键 词：高级氧化 含盐废水 氯离子 羟基自由基 硫酸根自由基 非自由基 

分 类 号：X52[环境科学与工程—环境工程]