【摘要】 研究了某住宅小区末梢饮用水水质状况,共测试水质指标21项,通过与供水水质对比,考察了供水过程中指标的变化及其对水质的影响.结果发现,其中10项指标变化显著,分别为氯化物,硫酸盐,挥发酚,硝酸盐(氮)、铁、锰,六价铬、铜、锌和镉,变化率最大者可达25倍;有3项指标,即挥发酚、铁和锰含量超出国家标准.通过对这些污染指标进行的单因子指数法评价表明,污染指数从大到小排序依次为锰(Pmax=13.2)、挥发酚(Pmax=9.5)和铁(Pmax=1.0).结合二次污染的有关含义,可初步认为输运过程中水质恶化了,其原因及机理有待进一步研究.更多还原

【Abstract】 The drinking water of a residential district has been studied in the paper. 21 parameters of water quality have been determined. The variety during water supply and its influence on water quality have been investigated. The results show that ten of them,such as chloride, sulphate, manganese, etc.,has varied obviously; three of them even has exceeded the limit with pollution index:13.2(manganese), 9.5(Phenol)and 1.0(iron), respectively. Considering the concept of pollution during water supply, it can be concluded that the water quality has become deteriorated. The mechanism has remained to be further studied.更多还原