金属污染物在城市给水管网迁移转化规律研究现状

Research status of migration and transformation of metal contaminants in drinking water distribution system

城市给水管网在长期运行过程中产生的大量腐蚀管垢,对饮用水中残存的重金属污染物具有极大的吸附能力和吸附容量。由于重金属污染物具有难于降解、易于迁移和转化的特性,在适当的条件下会由腐蚀垢中释放并进入饮用水,危害人体健康。从管网饮用水重金属污染的原因、现状、管垢中常见重金属污染物的存在形态、影响管网重金属释放的因素四个方面,总结了目前国内外对于重金属污染物在饮用水管网内迁移转化的研究成果,以期为给水管网重金属释放控制技术的研究提供借鉴。

In the long-term operation of drinking water distribution system(DWDS), lots of corrosion pipe scale would be produced, which have great adsorption capacity for residual heavy metal contaminants in drinking water. Due to the characteristics of difficult degradation, easy migration and transformation, the heavy metal contaminants will be released into drinking water under appropriate conditions, which is harmful to human health. Heavy metal contamination in DWDS has aroused wide attention in the world. The research on the migration and transformation of heavy metal contaminants in DWDS at China and abroad from four aspects were summarized, including the causes and current situation of heavy metal contamination in DWDS, the existing forms of common heavy metal contaminants in pipe scale, and the factors affecting the release of heavy metals, so as to provide reference for the research of heavy metal release control technology in DWDS.