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目的了解潍坊城区丰水期和枯水期居民生活饮用水中挥发性有机物(VOCs)的污染状况。方法于2015年2月和2015年8月分别采集潍坊市部分居民生活饮用水样111份,采用吹扫捕集-气质联用技术测定28种挥发性有机污染物。结果 222份水样共检出13种VOCs,检出浓度0.10μg/L~62.2μg/L,检出率为1.33%~100%,其中三氯甲烷、二氯一溴甲烷、一氯二溴甲烷、三溴甲烷等消毒副产物检出率最高。经方差分析发现不同类型、不同采样地区水样VOCs均值之间的差异有统计学意义(P<0.05),而枯水期与丰水期水样VOCs均值之间的差异无统计学意义(P>0.05)。结论潍坊市五区生活饮用水检出的挥发性有机物主要组成是消毒副产物以及痕量的苯系物,且均合格。
Objective To understand the pollution status of volatile organic compounds (VOCs) in drinking water of Weifang urban area in wet season and dry season. Methods A total of 111 drinking water samples were collected from some residents of Weifang City in February 2015 and August 2015 respectively, and 28 volatile organic compounds (VOCs) were detected by purge and trap - gas chromatography - mass spectrometry. Results A total of 222 VOCs were detected in 222 water samples with a detection limit of 0.10μg / L ~ 62.2μg / L and a detection rate of 1.33% -100%. Among them, chloroform, methylene chloride, chlorodibromomethane, Tribromo methane and other disinfection by-products the highest detection rate. Variance analysis showed that there was a significant difference between the mean values of VOCs in different types and sampling areas (P <0.05), while there was no significant difference between mean values of VOCs in dry and wet periods (P> 0.05 ). Conclusion The main components of volatile organic compounds (VOCs) detected by drinking water in the five districts of Weifang City are disinfection by-products and traces of benzene series, all of which are qualified.