Impact of water source mixture and population changes on the Al residue in megalopolitan drinking water
Impact of water source mixture and population changes on the Al residue in megalopolitan drinking water
复制标题
水源结构和人口变化对大城市饮用水中铝残留的影响
DOI：
10.1016/j.watres.2020.116335
复制
发表时间：
2020
期刊：
影响因子：
12.8
通讯作者：
Qixuan Wang
中科院分区：
文献类型：
--
作者：
Chenhao Tian;Chenghong Feng;Lei Chen;Qixuan Wang
本研究建立了一个新的认识，铝残留在大城市饮用水供应系统与混合水源的贡献。研究了外来水源、居民迁移和季节变化对饮用水中铝残留的不同影响和贡献。特别是首次揭示了南水北调1200 km调水对北方某特大城市供水系统铝残留的影响。通过对单一水源和混合水源供水系统中铝残留量的大数据对比发现，引入南方水源后，饮用水中铝残留量增加了35%以上。中国农历新年期间世界上最大的一次居民迁移和季节变化影响了城市供水管网水动力，表现为颗粒铝的周期性变化及其与居民时空分布的关系。由于水质的差异，南方的水促进了历史沉积的铝的释放，并有利于旧管道的清洁。
This study establishes a new understanding of the contributions of Al residue in a megalopolitan drinking water supply system with mixed water sources. The different influences and contributions of foreign water source, resident migration and season changing to Al residue in drinking water were investigated. Especially, the role of Southern water transferred over 1200 km via the South-to-North Water Diversion Project in the Al residue of drinking water supply system of a northern megalopolitan were revealed for the first time. Comparisons of big data on Al residue in the water supply system with sole and mixed water sources showed that the introduction of Southern water enhanced the Al residue in drinking water by over 35%. The world's largest annual residents’ migration during Chinese Lunar New Year and the changes of season affect the water pipework hydrodynamics, which were embodied as the periodic changes of particulate aluminium and the relations with resident's temporal-spatial distribution in the megalopolitan. Because of the differences in water quality, Southern water promotes the release of historically deposited Al and facilitates the cleaning of old pipes.