摘要
相对氯消毒,氯胺具有消毒副产物生成量低的特点。本试验模拟管网,取典型的停留时间2d,考察了氯胺消毒时,pH和Cl2:N对管网中的消毒副产物(三卤甲烷和卤乙酸)浓度的影响。试验表明,消毒副产物的浓度及其含溴的程度基本上随着pH降低、Cl2:N升高而增大。试验条件下,氯胺生成的卤乙酸量大都高于三卤甲烷,并且以二卤乙酸为主,这和自由氯时所生成三卤甲烷多、卤乙酸以三卤乙酸为主的倾向正好相反。
Compared with liquid chlorine disinfection, chloramination has low quantity of disinfection by-products （DBPs）.This study examined the impact of the pH and ratio of chlorine to ammonia-nitrogen （C12：N ratio） on the formation of trihalomethanes（THMs） and haloacetic acids （HAA5）in water system with chloramine,under two-day simulated pipeline system.The results indicated that THMs and HAA5 formation and the degree of bromination of THMs and HAA5 increased with decreasing pH and,increasing C12：N ratio;under test conditions, chloramination produced HAA5 concentrations in excess of the THMs concentration. The dihaloacetic acids dominated for all of the experiments while, chlorination produced more THMs with trihaloacetic acids dominating in the experiments.
出处
《水处理技术》
CAS
CSCD
北大核心
2006年第7期67-69,共3页
Technology of Water Treatment
基金
国家高科技研究发展计划(863)项目(2002AA601130)
关键词
饮用水
氯胺
管网
消毒副产物
三卤甲烷
卤乙酸
drinking water
chloramine
pipeline system
disinfection by-products
trihalomethanes
haloacetic acids
