城市安全供水综合指数研究——以太原为例

Research on Comprehensive Index of Urban Water Supply——A Case Study in Taiyuan

采集太原市不同区住户的自来水和12种瓶装水,分析了水中无机离子和挥发性有机物(VOCs)成分。结果表明,无机离子和VOCs的总浓度范围分别为1.08~354.18 mg/L和0.43~13.98μg/L;自来水中的无机离子与VOCs含量最高,约是瓶装水中浓度的三倍。加热与过滤处理措施均可改善自来水水质,对水中无机离子和VOCs的去除效果均可达19%~100%,其中过滤可能会引发VOCs的二次污染。根据饮用水标准,使用饮用水水质指数(DWQI)模型对水质评价结果显示,太原市饮用水水质总体较好。

In this study, tap water samples were collected at different residents and bottled water (12 brands) were purchased from local market in Taiyuan.The ions and volatile organic compounds ( VOCs) in the samples were analyzed.The results showed that concentrations of ions and VOCs ranged from 1.08 to 354.18 mg/l and 0.43 to 13.98 μg/l, respectively.Levels of ions and VOCs in tap water, which were about 3 times as in bottled water, were the highest in entire samples.Quality of drinking water from tap water can be improved by both boiling and filtration, and removal rate ranged from 20% to 100%.But secondary pollu-tion of VOCs could be introduced during filtration.Based on drinking water standard, model of Drinking Water Quality Index was applied to assess the quality of bottled water and tap water.The results showed that most of the samples were up to good water quality standard.