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目的了解成都铁路辖区饮用水水质状况,为保证生活饮用水安全提供科学依据。方法采用现场采样方法,监测2007-2009年成都铁路辖区集中式供水水质,按《生活饮用水卫生标准检验方法》进行检测。结果 2007-2009年成都铁路辖区集中式供水出厂水水质合格率分别为98.39%,90.51%和95.16%,各年度合格率差异有统计学意义(χ2=100.5,P<0.05);水厂微生物指标、感官性状和一般化学指标、毒理学指标、消毒剂常规指标合格率分别为98.61%、96.61%、97.35%和95.83%;给水所合格率分别为93.94%、93.32%、97.25%和77.27%,除毒理学指标差异无统计学意义(χ2=0.009,P>0.05),其余指标差异均有统计学意义(χ2=9.71,P<0.05);枯水期和丰水期微生物指标、感官性状和一般化学指标、毒理学指标、消毒剂指标等4项指标除毒理学指标差异无统计学意义外,其余指标差异均有统计学意义(χ2=3.30,P<0.05)。结论 2007-2009年中2008年成都铁路辖区集中式出厂水合格率最低;规模较大的水厂出厂水合格率高于规模较小的给水所;枯水期微生物指标和消毒剂指标合格率高于丰水期,而感官性状和一般化学指标合格率则低于丰水期。
Objective To understand drinking water quality in Chengdu railway area and provide a scientific basis for ensuring the safety of drinking water. Methods The on-site sampling method was used to monitor the centralized water quality of Chengdu Railway Subproject from 2007 to 2009 and tested according to the “Standard Test Method for Domestic Drinking Water”. Results The passing rate of centralized water supply in Chengdu Railway from 2007 to 2009 was 98.39%, 90.51% and 95.16%, respectively. The passing rate of each year was significantly different (χ2 = 100.5, P <0.05). The microbial index Sensory traits and general chemical indicators, toxicological indicators, disinfectant conventional indicators pass rates were 98.61%, 96.61%, 97.35% and 95.83% respectively; the passing rate of water supply were 93.94%, 93.32%, 97.25% and 77.27% There was no significant difference in toxicological indexes (χ2 = 0.009, P> 0.05) between the two groups except for toxicology (χ2 = 0.009, P> 0.05) Except for the toxicological indexes, there were no significant differences among the four indexes (index, toxicological index and disinfectant index) except the toxicological indexes (χ2 = 3.30, P <0.05). Conclusion From 2007 to 2009, the qualified rate of centralized ex-factory water in Chengdu Railway sub-district was the lowest in 2008-2009. The passing rate of ex-factory water of larger-scale waterworks was higher than that of the smaller one. The passing rate of microbial index and disinfectant index in dry season was higher than that of the indicator Water period, while the pass rate of sensory traits and general chemical indicators is lower than the wet season.