净水技术2018，Vol.37Issue(2)：45-52,8.DOI:10.15890/j.cnki.jsjs.2018.02.008
不同消毒方式和工艺条件对碘代三卤甲烷生成的影响
Effect of Different Disinfection Methods and Process Conditions on Formation of I-THMs
摘要
Abstract
As one of the emerging halogenated disinfection by-products (DBPs) in water industry,iodinated DBPs was paid increasing attention recently.Despite of its low concentration in water,usually in the range from ng/L to μg/L,it posed higher risks for mutagenesis,carcinogenesis and teratogenesis than chlorinated and brominated DBPs.Characteristics of I-THMs formation by different disinfection methods and under different process conditions were studied in detail and the formation mechanism was investigated,using the raw water sample from Jingmi Diversion Canal.Results showed that the amount of I-THMs produced was dependent on pH value,type of disinfectant and iodine concentration.At high iodine concentration (usually ≥ 1 000 μg/L),CHI3 was the main variety of I-THMs for different disinfection methods including chloramination,chlorination,HOBr and HOBr+(NH4)2SO4 disinfections,while at low iodine concentration (usually ≤750 μg/L),the main varieties of I-THMs for chloramination was CHI3,for chlorination was CHCl2 I,and for HOBr and HOBr+ (NH4)2SO4 disinfections were I-THMs containing Br (CHBr2I and CHBrI2),respectively.Increase of pH value lead to production of more I-THMs,especially for chloramination,while production of I-THMs containing Br showed negative relationship with the increase of pH value.As the disinfectant of HOBr could reduce the formation of I-THMs effectively and might not increase the formation of Cl/Br-THMs obviously,it would have application prospect and need to be further studied.关键词
碘代三卤甲烷/消毒副产物/消毒方式/京密引水渠Key words
I-THMs/disinfection by-products (DBPs)/disinfection method/Jingmi Diversion Canal分类
建筑与水利引用本文复制引用
李明阳..不同消毒方式和工艺条件对碘代三卤甲烷生成的影响[J].净水技术,2018,37(2):45-52,8.基金项目
国家自然科学基金(21277005) （21277005）
