给水管网中管材对水质变化的影响研究  

Effect of Pipe Materials on Water Quality in Water Supply System

作　　者：王蕾[1] 杨敏[1] 石宝有 顾军农 樊康平 

机构地区：[1]中国科学院生态环境中心环境水质学国家重点实验室,北京100085 [2]北京市自来水集团有限责任公司水质监测中心,北京100085

出　　处：《给水排水》2006年第z1期213-216,共4页Water & Wastewater Engineering

摘　　要：研究了给水管网中镀锌钢管、铝塑管等常用管材中水质变化的规律,得出了三种管材中游离氯和化合氯的衰减规律,分析了金属离子溶出的影响因素。发现三种管材中旧镀锌钢管的余氯衰减最快,新镀锌钢管比铝塑复合管余氯衰减要快,旧镀锌钢管中余氯衰减呈现一级动力学特征,新镀锌钢管和塑料管余氯衰减呈现零级动力学特征。随着管网水停留时间的增加,锌、铁等金属离子浓度增加,溶出铁的含量与浊度、色度呈现很好的线性相关关系。Variation rule of water quality was studied in corroded galvanized steel pipe, new gal vanized steel pipe and plastic pipe. The characteristics of free chlorine and combined chlorine decay were obtained, and the influence factors on metal ion release were also analyzed. It was found that chlorine residual of corroded galvanized sfeel pipe decayed fastest of all. Chlorine residual decay reaction in corroded galvanized steel pipe was first order reaction, while zero order reaction in new galvanized steel pipe and plastic pipe. The concentration of zinc and iron ion increased with reten tion time increased. The relationship between iron concentration and turbidity, color was linear.

关 键 词：给水管网 管材 余氯衰减 金属离子释放 

分 类 号：TU991[建筑科学—市政工程] TU992