色氨酸氯化消毒生成卤乙酸的影响因素研究  

Haloacetic acids formation from tryptophan during chlorination disinfection

作　　者：陈忠林[1] 李安[1] 王胜军[2] 沈吉敏[1] 

机构地区：[1]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 [2]北京市市政工程设计研究总院第二设计所,北京100082

出　　处：《黑龙江大学自然科学学报》2010年第6期731-734,共4页Journal of Natural Science of Heilongjiang University

基　　金：国家自然科学基金资助项目(50578052);国家高技术研究发展计划(863计划)专题课题(2007AA06Z339)

摘　　要：作为传统的消毒方式,氯化消毒可以有效杀灭水中致病微生物,但同时也会产生有害的消毒副产物(DBPs)。含氮有机物是DBPs的重要前质,为考察其对卤乙酸的生成影响,选取色氨酸作为反应前质,对其氯化过程中生成卤乙酸(HAAs)的影响因素进行实验研究。考察了氯化反应时间、氯投量、反应温度、反应pH值、溴离子浓度等影响因素。结果表明,随着反应时间和氯投量的增加,HAAs的产量逐渐增加,且在反应初始阶段增加较快;在中性及碱性条件下,HAAs产量较高;在常温时HAAs的生成量高于低/高温时的生成量;有效氯和溴离子对HAAs的生成具有交互作用,随着有效氯和溴离子的增加,HAAs的生成量也呈增加趋势;随着反应时间的推移,溴代卤乙酸质量分数n呈上升趋势,故控制消毒反应时间可以有效控制HAAs的"三致"风险。As a traditional disinfection method,chlorination disinfection can reduce bacteria and virus in drinking water effectively,but the generation of disinfection by-products（DBPs） during chlorination process is an unintended consequence.Nitrogenous organic compounds are important precursors of DBPs in chlorination disinfection process.In this experiment,tryptophan was selected as the reaction precursor and the factors affecting the formation of HAAs during chlorination,such as reaction time,chlorine dosage,pH,temperature and Br- concentration were investigated.The results indicated that the yield of HAAs was increased with the increase of the reaction time and the chlorine dosage.The pH and the temperature also had some influence on the formation of HAAs.The yield of HAAs was increased with the increasing of Br-and Cl2 concentration,and the bromide-substituted HAAs coefficient was tend to increase with the reaction time.Controlling chlorination reaction time was an effective method to control the cancer risk in chlorination disinfection process.

关 键 词：含氮有机物 氯化消毒 色氨酸 卤乙酸 溴离子 

分 类 号：TU991.25[建筑科学—市政工程]