%0 Journal Article
%T Influence of Water Source Switching on Water Quality in Drinking Water Distribution System<br>水源更换对给水管网水质的影响研究
%A WANG Yang
%A NIU Zhang-bin
%A ZHANG Xiao-jian
%A CHEN Chao
%A HE Wen-jie
%A HAN Hong-da
%A <br>王洋
%A 牛璋彬
%A 张晓健
%A 陈超
%A 何文杰
%A 韩宏大
%J 环境科学
%D 2007
%I 
%X This study investigates the regularity of the change on the physical and chemical water qualities in the distribution system during the process of water source switching in A city. Due to the water source switching, the water quality is chemical-astable. Because of the differences between the two water sources, pH reduced from 7.54 to 7.18, alkalinity reduced from 188mg?L-1 to 117mg?L-1, chloride (Cl-)reduced from 310mg?L-1 to 132mg?L-1, conductance reduced from 0.176S?m-1 to 0.087S?m-1 and the ions of calcium and magnesium respectively reduced 15mg?L-1 and 11mg?L-1; residual chlorine changed while the increase of the chlorine demand and the water quantity decreasing at night; the changes of pH, alkalinity and residual chlorine brought the iron increased to 0.4mg?L-1 at the tiptop, which was over the standard. The influence of the change of the water parameters on the water chemical-stability in the drinking water distribution system is analyzed, and the controlling countermeasure is advanced: increasing pH, using phosphate and enhancing the quality of the water in distribution system especially the residual chlorine.
%K drinking water distribution system
%K water source switching
%K chemical-stability
%K iron release<br>给水管网
%K 水源更换
%K 化学稳定性
%K 铁释放
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=3FF3ABA7486768130C3FF830376F43B398E0C97F0FF2DD53&cid=A7CA601309F5FED03C078BCE383971DC&jid=64CD0AA99DD39F69401C615B85F123EF&aid=B50248F688C20E6C&yid=A732AF04DDA03BB3&vid=D3E34374A0D77D7F&iid=F3090AE9B60B7ED1&sid=412406815C5C2F79&eid=84C1FE7A9C76369B&journal_id=0250-3301&journal_name=环境科学&referenced_num=0&reference_num=8