摘要
采用顶空固相微萃取-气相色谱质谱联用研究了上海市某黄浦江水源供水系统中2-甲基异莰醇(MIB)、土味素(GSM)和余氯的迁移变化规律.结果表明,黄浦江源水及其各级净水工艺处理水、管网水和二次供水系统末端水中均含有MIB和GSM,分别在2～18 ng/L和2.68～5.06 ng/L之间;其浓度经水厂各级工艺处理后明显下降;在管网输送过程中总体呈下降趋势.对比2种物质嗅阈值,认为MIB是上海饮用水中的致嗅物质.经过水厂投加的余氯水平在管网中呈显著的衰减,但由于出厂水余氯较高,仍可能造成嗅味影响.
Migration and variation of odorous compounds as geosmin,2-methylisoborneol （MIB） and residual chlorine in drinking water taken from Huangpu River were studied by using headspace solid phase mieroextraction procedure （HSPME） and gas chromatograph with mass spectrometry. The results showed that, raw water,processed water, pipe water （taken from pump station） and secondarysupply water all contained MIB and geosmin ranging from 2 ng/L to 18 ng/L and 2.68 ng/L to 5.06 ng/L respectively and decreased dramatically during the water processing and distribution system. MIB is proved to be a kind of the odorous compounds in drinking water of Shanghai by comparing the concentrations of MIB and GSM with their odor threshold. The concentration of residual chlorine declined greatly in the distribution system ,but because of the high value at the outlet of waterworks, it still may exceeded the influence of MIB and cause the odour problems.
出处
《环境科学》
EI
CAS
CSCD
北大核心
2011年第1期120-124,共5页
Environmental Science
基金
国家水体污染控制与治理科技重大专项(2009ZX07421-005)
关键词
饮用水
致嗅物质
2-甲基异莰醇
土味素
余氯
drinking water
odorous compounds
2-methylisoborneol （MIB）
geosmin （ GSM ）
residual chlorine
