广西农村饮用水水质铁指标监测结果分析

目的探讨广西农村饮用水水质铁指标的含量分布及其与其它水质指标含量的相关关系,为选择针对性的水质净化措施提供依据。方法分别于2010年枯水期（3月）和丰水期（7-8月）对广西107个县（市、区）按比例分层采集不同水源类型和供水方式的农村饮用水水样10 044份,其中集中式供水水样8 690份,分散式供水水样1 354份,依据国家有关标准对水质铁、锰、色度、浑浊度和pH等指标进行检测和评价,并对铁指标超标与其它检测指标超标进行描述性和相关性分析。结果 10 044份水样中,水质铁指标超标率为3.69%。不同水源类型水质铁指标超标率差异有统计学意义（χ2=31.717,P〈0.01）,地表水超标率高于地下水;不同供水类型（集中式和分散式）水质铁指标超标率差异无统计学意义（χ2=0.218,P〉0.05）;不同地理区域铁指标超标率桂南〉桂东〉桂西〉桂北〉桂中。分析结果表明,水质铁指标超标与色度、锰、浑浊度指标超标呈现正相关,而与pH指标超标无关联。结论广西农村饮用水水质铁指标超标与水质色度、锰和浑浊度指标超标有一定相关关系。

Drinking-water Quality Assessment for Iron in Rural Areas of Guangxi

Objective To investigate the content and distribution of iron in rural drinking-water of Guangxi,and to analyze the correlation between iron and other water quality parameters.Methods A total of 10,044 rural drinking water samples,including 8,690 from centralized water sources and 1,354 from scattered water sources,were collected from 107 counties(cities or districts) around Guangxi during the dry season(March) and the rainy season(July to August) in 2010.Iron,manganese,color,turbidity and pH were measured ...