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目的分析2008年-2013年河南省农村饮用水中铁、锰含量变化趋势,提高农村饮用水水质,为本省农村饮水安全工程建设及管理提供科学依据。方法依据GB 5749-2006《生活饮用水卫生标准》对2008年-2013年河南省农村饮用水中铁、锰的监测结果进行分析和评价。结果 2008年-2013年共检测水样16 110份,其中铁、锰合格水样分别为15 629份、15 724份,铁、锰合格率分别为97.01%、97.60%,6年间铁、锰合格率均持续提高,其变化差异有统计学意义(χ2值为51.2、62.37,Ρ<0.05)。6年间水样中铁、锰含量变化范围不大,铁、锰检出率差异无统计学意义(χ2值为7.1、3.3,Ρ>0.05)。以地下水为水源的水样中铁、锰的合格率高于以地表水为水源的水样,6年间不同水源的水样中铁、锰合格率差异具有统计学意义。农村部分饮用水中铁、锰呈伴生的现象,一共检出3 300份铁、锰伴生水样。6年的农村饮用水中铁、锰共存的情况,经统计分析,各年间差异无统计学意义(χ2=5.61,Ρ>0.05)。结论 2008年-2013年,本省农村集中式供水工程出厂水中铁、锰指标合格率持续提高。
Objective To analyze the trend of iron and manganese content in rural drinking water in Henan Province from 2008 to 2013 and improve the drinking water quality in rural areas so as to provide a scientific basis for the construction and management of rural drinking water safety projects in the province. Methods The monitoring results of iron and manganese in rural drinking water in Henan Province from 2008 to 2013 were analyzed and evaluated according to GB 5749-2006 Sanitary Standard for Domestic Drinking Water. Results A total of 16 110 samples were collected from 2008 to 2013. The qualified water samples of iron and manganese were 15 629 and 15 724 respectively. The passing rates of iron and manganese were 97.01% and 97.60% respectively. Rates continued to increase, the difference was statistically significant (χ2 = 51.2,62.37, P <0.05). There was no significant change in iron and manganese content in water samples during 6 years, but there was no significant difference in iron and manganese detection rates (χ2 = 7.1, 3.3, P> 0.05). The qualified rate of iron and manganese in water samples with groundwater as the source is higher than that of the water samples with surface water as the water source. The difference of passing rate of iron and manganese in water samples of different water sources in six years has statistical significance. A total of 3 300 iron and manganese-associated water samples were detected in the drinking water in rural areas as a result of the accompanying phenomenon of iron and manganese in drinking water. Six years of drinking water in rural areas in the coexistence of iron and manganese, the statistical analysis, there was no significant difference between the years (χ2 = 5.61, Ρ> 0.05). Conclusion From 2008 to 2013, the passing rate of iron and manganese indicators in the water supplied by the centralized rural water supply project in the province continued to increase.