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中文摘要：
通过考察静态模拟管网中TOC、浊度、细菌总数、金属溶出量等指标的变化,研究了不锈钢管、铜管、PPR管三种常见管材对直饮水水质的影响.结果表明,铜管的稳定性较差,浸泡1h后水中铜含量超标,但铜管对细菌有一定的抑制作用;不锈钢管长时间浸泡会出现浊度上升和镍含量超标的问题;PPR管的总体稳定性较好,但在浸泡过程中会有微量酚类有机物溶出,且当水中存在细菌时,会出现细菌的大量生长.
英文摘要：
The effect of three kinds of pipes, such as stainless steel, copper and polypropylene （PPR） pipes, on water quality of direct drinking water was investigated by monitoring variations of parameters of total organic carbon （ TOC）, turbidity, total bacterial number and dissolved metals in pipe soaking experiment. The results show that the copper pipe has a poor stability, and the dissolved copper concentration exceeds the national standards after 1 hour of soaking, however, the copper pipe is able to restrain some bacteria. When the stainless steel pipe is soaked, an increase in turbidity and the nickel concentration to exceed the national standards appears after an extended period. The PPR pipe has better stability, however, trace phenolic organic pollutants dissolve into the water during soaking. When there are some bacteria in water, bacteria were discovered breeding in large amount.
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