摘要
研究了上海市2条不同水源水厂配水管网中可同化有机碳(AOC)、三卤甲烷(THMs)和卤乙酸(HAAs)的变化情况,并对饮用水生物稳定性和消毒副产物间的相关性进行了分析.结果表明,管网中AOC和HAAs含量受余氯和微生物活动双重作用的影响,在距水厂较近、余氯较高的管网中,可能因氯与有机物继续反应出现上升,在余氯较低的管网末梢则因为微生物降解作用使含量下降;THMs含量则只受余氯的影响,随管网延伸持续增长.HAAs与AOC含量间存在较好的线形关系,前体物间具有相似性,THMs与AOC含量间呈正相关性;作为饮用水安全性的2个重要方面,生物稳定性和消毒副产物间具有内在的关联性.
Variations of assimilable organic carbon（AOC）,trihalomethanes（THMs） and haloacetic acids（HAAs） in two different water distribution systems（DSs） were investigated in Shanghai,a eastern city of China.Correlations of drinking water biological stability and disinfection byproduct were analyzed.The results show that AOC and HAAs are varied based on chlorine residual and microbial activity.And their concentrations are increased by chlorine oxidation in the front part of pipe networks where high residual chlorine contents exist,while reduced by bacterial consuming in the end part pipe networks where low residual chlorine exists.Changes of THMs in DSs are influenced by residual chlorine merely,and contents have risen with the extension of pipe net.There are evident linear relationships between HAAs and AOC,and precursors of them are homologous.Contents of THMs are positively correlated with AOC.Therefore biological stability and disinfection byproduct,as two important factors of drinking water safety,present inherent relevances.
出处
《环境科学》
EI
CAS
CSCD
北大核心
2007年第9期2030-2034,共5页
Environmental Science
基金
国家高技术研究发展计划(863)项目(2002AA601130)
上海同济高廷耀环保科技发展基金会项目
江苏省科技厅重大公益专项(BM2006716)
江苏省环境工程重点实验室开放基金项目(KF2007004)
关键词
可同化有机碳
三卤甲烷
卤乙酸
饮用水
生物稳定性
消毒副产物
assimilable organic carbon
trihalomethanes
haloacetic acids
drinking water
biological stability
disinfection byproducts
