溶解性有机物与活性氯物种反应过程中其分子组成对消毒副产物生成的影响  

The influencing mechanism of molecular composition of dissolved organicmatter on the formation of disinfection byproducts mediated by reactivechlorine species

作　　者：李淑而 张璧洁 李梓韶 王樟新 张众 LI Shuer;ZHANG Bijie;LI Zishao;WANG Zhangxin;ZHANG Zhong(Guangdong University of Technology,Guangzhou 510006,China)

机构地区：[1]广东工业大学生态环境与资源学院,广东省流域水质改善与生态修复重点实验室,广州510006

出　　处：《环境工程学报》2024年第6期1593-1603,共11页Chinese Journal of Environmental Engineering

基　　金：国家自然科学基金面上资助项目(52370034)。

摘　　要：溶解性有机物(DOM)在紫外/氯(胺)高级处理过程中会与活性氯物种(Cl^(·)和Cl_(2)^(·-))反应生成消毒副产物(DBPs),进而影响水质的毒性和安全性。本研究详细研究了单一活性氯物种(Cl^(·)或Cl_(2)^(·-))与不同来源DOM反应生成DBPs的情况,重点探究了DOM分子组成与生成DBPs质量浓度、种类、毒性之间的相关关系。结果表明:Cl^(·)与DOM反应过程中主要生成的DBPs及毒性贡献者分别为三卤甲烷(THMs)和卤乙醛(HALs)。DOM的分子组成与生成DBPs的质量浓度、种类及毒性之间相关性较低,这可能归因于Cl^(·)与不同DOM之间相似的反应活性,而在Cl_(2)^(·-)与DOM反应过程中HAAs和非管制类DBPs分别为主要生成的DBPs和毒性贡献者。此外,生成DBPs的质量浓度、种类及体系的毒性与DOM分子的不饱和度、芳香度、含氧量、极性呈负相关,与DOM中含N、S、P官能团化合物的相对含量呈正相关。本研究推动了DOM在单一活性氯物种介导下生成DBPs的研究,并为高级氧化工艺参数的优化及高毒性副产物的消减提供依据。Dissolved organic matter(DOM)reacts with reactive chlorine species(Cl^(·)and Cl_(2)^(·-))during UV/chlor ine(amine)advanced oxidation processes to form disinfection byproducts(DBPs),which affect the toxicity and safety of water quality.In this study,the formation and toxicity of DBPs during the reaction between Cl^(·)or Cl_(2)^(·-)and DOM with different origins were investigated,and the relationship between the molecular composition of DOM and the properties of formed DBPs such as concentration,species and toxicity was explored.The results showed that the main contributors to DBPs formation and toxicity were trihalomethanes(THMs)and haloacetaldehydes(HALs)during the reaction between Cl^(·)and DOM.The poor correlation between the molecular composition of DOM and the mass concentrations,species,and toxicity of DBPs may be attributed to the similar reactivity between Cl^(·)and different DOMs.In contrast,HAAs were the main contributors to the generation of DBPs and non-regulated DBPs were the main contributors to toxicity of DBPs during the reaction between Cl_(2)^(·-)and DOM.In addition,the mass concentration,species and toxicity of DBPs were negatively correlated with the unsaturation,aromaticity,oxygen content and polarity of DOM,and positively correlated with the relative content of N,S and P compounds in DOM.This study promotes the research on the formation of DBPs caused by DOM reacting with a single reactive chlorine species,and provides reference for parameter optimization of AOP and the reduction of DBPs formation and toxicity.

关 键 词：活性氯物种 溶解性有机物 消毒副产物 分子组成 

分 类 号：X703[环境科学与工程—环境工程]