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目的:探讨净水器处理水水质在感官性状、一般化学性状、毒理学和微生物指标方面是否优于自来水。方法:在太原市5个不同居民小区采集5份匹配的自来水和净化水水样,并用相应的检测方法对浑浊度、pH值、总硬度、溶解氧、铝、铁、锰、锌、硒、汞、砷、铅、镉、总铬、总大肠菌群等15项指标进行检测。结果:自来水中镉和铁含量超标率均为100%,净化水中镉和铁含量超标率分别为40%和80%;两种水体的其他三类指标均达到我国生活饮用水卫生标准。结论:太原市自来水镉、铁含量在一定地区存在超标。净化水总硬度偏低,许多有毒重金属含量较自来水更安全。
Objective: To investigate whether water quality of treated water purifier is better than tap water in terms of sensory traits, general chemical traits, toxicology and microbial indicators. Methods: Five samples of tap water and purified water were collected from 5 different residential areas in Taiyuan City. The turbidity, pH, total hardness, dissolved oxygen, aluminum, iron, manganese, zinc, selenium, Mercury, arsenic, lead, cadmium, total chromium, total coliforms and other 15 indicators were detected. Results: The over-standard rate of cadmium and iron in tap water was 100% and the over-standard rates of cadmium and iron in purified water were 40% and 80% respectively. The other three indexes of both water bodies reached the sanitary standard of domestic drinking water. Conclusion: Taiyuan tap water cadmium, iron content in some areas there is excessive. The total hardness of purified water is low, and many toxic heavy metals are safer than tap water.