无锡市饮用水嗅味突发事件致嗅原因及潜在问题分析  

Analyses on cause for odor and potential problems in water source during odor episode event in Wuxi

作　　者：于建伟[1] 李宗来[1] 曹楠[1] 杨敏[1] 丁建清 苗婷婷[1] 张君枝[1] 

机构地区：[1]中国科学院生态环境研究中心环境水质学国家重点实验室,北京100085 [2]无锡市环境监测站,无锡214023

出　　处：《环境科学学报》2007年第11期1771-1777,共7页Acta Scientiae Circumstantiae

基　　金：国家自然科学基金项目(No.50678166);国家杰出青年科学基金项目(No.2004AA649280)~~

摘　　要：针对2007年5月底6月初发生的无锡市饮用水嗅味事件,在嗅味层次分析法(FPA)的基础上,利用感官气相色谱法对污染水团、取水口以及管网水中的致嗅物质种类进行了鉴定,并利用GC-MS对主要致嗅物质进行了定量分析,同时,对微囊藻毒素含量以及生物遗传毒性进行了测定.结果表明,此次嗅味事件的主要致嗅物质为以二甲基三硫为主的硫醚类有机体腐败产物,6月4日采集的污染水团中二甲基三硫含量高达11399ng·L-1.同时,含有一定量的2-甲基异莰醇(MIB)等藻类分泌物,但这些物质的嗅味被二甲基三硫等硫醚类化合物导致的腥臭味所掩盖,不是主要的致嗅物质.另外,6月4日及6月8日采集的取水口样品分析结果表明,原水中微囊藻毒素含量远低于新颁布的生活饮用水卫生标准,而且,利用umu测试得到的水中遗传毒性水平很低.An odor episode event, occurring in Wuxi city from the end of May to early June, 2007, were investigated. Using flavor profile analysis （FPA） and sensory GC, the odorous compounds of polluted black agglomeration, raw water and finished water were identified. Meanwhile, main odorous compounds were quantified using GC/MS, and microcystins content and biological genotoxicity were also determined. It showed that the main odorous compounds were some sulfide compounds such as dimethyl trisulfide, coming from organisms decomposition, and concentration of dimethyl trisulfide were 11399 ng·L^-1 high in the black agglomeration sampled in 4 June. Some cyanobacterial metabolites like MIB were also detected but not the main odorous compound, which was covered by fishy and septic odor caused by sulfide compounds like dimethyl trisulfide. Microcystlns content in raw water sampled in 4 June and 8 June was much lower than the standard that was recently implemented in Standards for Drinking Water Quality, and the biological genotoxiclty determined by umu test was very low.

关 键 词：饮用水 嗅味 藻华 微囊藻毒素 遗传毒性 

分 类 号：X132[环境科学与工程—环境科学]