摘要
为阐明饮用水厂运行中主要消毒副产物的形成特征及转化规律,提出有效的控制措施,以北方某饮用水厂为研究对象,对采用预加氯的不同处理单元出水中3类消毒副产物,即8种卤乙酸(HAAs)、亚硝基二甲胺(NDMA)和4种三卤甲烷(THMs)的变化特征进行了研究。结果表明,经预氯化后3类副产物显著增加,HAAs、NDMA和THMs和质量浓度合计分别为33.1μg/L、9.0 ng/L和55.1μg/L;经双层滤料过滤后得到不同程度去除,5种可去除HAAs的去除率为15.7%～60.8%,NDMA去除率为48.1%,4种THMs的去除率为26.1%～49.2%。氯胺消毒下总出水中3类副产物含量也未明显增加,表明预氯化及氯胺消毒是进一步削减消毒副产物产生、降低饮用水健康安全风险的重要控制措施。
The fates of disinfection by-products （DBPs） （Haloacetic acids （HAAs）, Nitrosomethylamine （NDMA） and Trihalomethanes （THMs） in a water supply treatment process was investigated. The objectives of this study were to identify the formation characterization of these DBPs, investigate the regular in different treatment processes after pre-chlorination, and provide the effective control measures. The results showed that HAAs, NDMA and THMs formed prominently when using pre-chlorination in the drinking treatment plants, the concentrations were 33.1 μg/L （∑ HAA6）, 9.0 ng/L （NDMA） and 55.1 μg/L （∑ THM4）. After quartz sand-anthracite filtration, the removal efficiencies of these DBPs were 15.7%-60.8% （5 HAAs）, 48.1% （NDMA）, 26.1%.-49.2% （4 THMs）. In addition, the concentrations of these DBPs did not increase in finished water during chloramination. Hence, pre-chlorination and chloramination are the mainly control measures for reducing DBPs and assuing the safety of water supply.
出处
《水处理技术》
CAS
CSCD
北大核心
2013年第6期37-40,44,共5页
Technology of Water Treatment
基金
国家自然科学基金项目(51208184)
河南省科技厅基础与前沿技术研究(122300410289)
"河南省创新型科技人才队伍建设工程"
关键词
消毒副产物
预氯化
卤乙酸
亚硝基二甲胺
三卤甲烷
氯胺化
disinfection by-products
pro-chlorination
haloacetic acids
nitrosomethylamine
trihalomethanes
chloramination
