典型含氮有机物氯化消毒过程中碘代三卤甲烷生成特征  

Formation of iodo-trihalomethanes during the chlorination of typical nitrogenous organics

作　　者：刘豹 孙谦 李鑫[1] 王行通 徐康[1] 郑兴[1] LIU Bao;SUN Qian;LI Xin;WANG Xingtong;XU Kang;ZHENG Xing(State Key Laboratory of Eco-hydraulics in Northwest Arid Region,Xi’an University of Technology,Xi'an,710048,China;Shimadzu Enterprise Management(China)Co.,LTD,Shanghai,200233,China)

机构地区：[1]西安理工大学省部共建西北旱区生态水利国家重点实验室,西安710048 [2]岛津企业管理(中国)有限公司,上海200233

出　　处：《环境化学》2023年第9期3221-3224,共4页Environmental Chemistry

基　　金：国家自然科学基金(52170053)资助。

摘　　要：碘代消毒副产物因其较强的细胞和遗传毒性给人们的饮用水安全造成了安全风险.本研究选取了水中常见的典型含氮有机物,包括氨基酸、多肽、蛋白质以及腐殖酸,对其氯化后碘代三卤甲烷(I-THMs)的生成规律予以研究.探讨了反应时间、氯投加量和pH对I-THMs生成的影响.结果表明,碘仿是最主要的I-THMs,I-THMs的生成速率,种类和数量与前体物的结构相关.色氨酸、赖氨酸和蛋白质氯化后I-THMs产量分别达到47.40、37.64、65.04μg·L^(−1).pH主要影响水中HOI的分布从而影响I-THMs的生成.高氯投加量和Br-会抑制I-THMs的生成,但也增加其他消毒副产物的生成风险.Iodinated disinfection byproducts pose threats to drinking water safety because of the cytotoxicity and genotoxicity.In this research,the formation of iodo-trihalomethanes(I-THMs)after chlorination of typical nitrogenous organics,including amino acids,peptides,proteins and humic acids,were studied.The effects of reaction time,active chlorine dosage,pH and bromide on I-THMs production were investigated.The results showed that iodoform is the most important I-THMs after chlorination,and the rate,type and quantity of I-THMs were related to the structure of the precursors.The total I-THMs of Tryptophan,lysine and protein was 47.40,37.64,65.04μg·L^(−1),respectively after chlorination.The distribution of HOI was strongly associated with solution pH,thus influence the formation of I-THMs.Generally,high chlorine dosages and bromine ions could restrain the formation of I-THMs,but also increased the risks of other disinfection byproducts.

关 键 词：含氮有机物 碘代三卤甲烷 氯消毒 碘离子 

分 类 号：TU991.25[建筑科学—市政工程]