氯胺消毒过程中碘代三卤甲烷生成的影响因素  

Factors Affecting Iodo-trihalomethane Formation during Chloramination of Micro-polluted Raw Water

作　　者：孙仲昊[1,2] 徐斌[1,2] 胡晨燕[3] 夏圣骥[1,2] 高乃云[1,2] 叶涛[1,2] 

机构地区：[1]同济大学污染控制与资源化研究国家重点实验室,上海200092 [2]同济大学长江水环境教育部重点实验室,上海200092 [3]上海电力学院能源与环境工程学院,上海200090

出　　处：《中国给水排水》2013年第5期1-4,9,共5页China Water & Wastewater

基　　金：国家自然科学基金资助项目(51278352;51078280);国家水体污染控制与治理科技重大专项(2012ZX07404004;2012ZX07408001)

摘　　要：碘代消毒副产物的"三致"特性远高于氯代和溴代消毒副产物,是近年来饮用水领域颇受关注的一类新兴消毒副产物。以微污染原水为研究对象,系统研究了其在氯胺消毒条件下碘代三卤甲烷类消毒副产物生成的影响因素。研究发现,在原水中存在一定浓度碘离子的条件下,采用氯胺消毒可产生较高浓度的碘代三卤甲烷类消毒副产物,其中以三碘甲烷为主;碘代三卤甲烷的生成总量随着反应时间的增加而增加;碘代三卤甲烷的生成量和组成受氯胺投加量的影响较大,在氯胺投加量较低的情况下主要生成三碘甲烷和一溴二碘甲烷,在氯胺投加量较高的情况下生成一氯二碘甲烷、二氯一碘甲烷、一溴二碘甲烷和三碘甲烷四种碘代三卤甲烷;碘代三卤甲烷的生成总量以及三碘甲烷在总碘代三卤甲烷中的比例随着碘离子浓度的增加而提高;总体上,氯胺化过程中碘代三卤甲烷的生成总量随着pH值的升高而增加。Iodinated disinfection byproducts contain higher mutagenesis, carcinogenesis and teratogenesis than chlorinated and brominated disinfection byproducts. Increasing attention is focused on these emerging byproducts in the drinking water field recently. The factors affecting iodo-trihalomethane formation during chloramination of micro-polluted raw water were investigated. The results showed that higher concentrations of iodo-trihalomethanes would be produced during chloramination in the presence of iodide in raw water, in which iodoform was predominant. The total amount of iodo-trihalomethanes increased with reaction time, and the total amount and species of iodo-trihalomethanes were influenced by chloramine dosage. Iodoform and bromodiiodomethane were generated by With high chloramine dosage, four kinds of iodo-trihalomethanes chloroiodomethane, bromodiiodomethane and iodoform were formed. tal iodo-trihalomethanes and the total amount of iodo-trihalomethanes During the chloramination, the total amount of iodo-trihalomethanes a relatively low chloramine dosage. including chlorodiiodomethane, diThe proportion of iodoform in the to- increased with iodide concentration. increased with increasing pH.

关 键 词：微污染原水 碘代三卤甲烷 消毒副产物 氯胺消毒 影响因素 

分 类 号：TU991.2[建筑科学—市政工程]