饮用水不同类型消毒剂对分质供水管材溶蚀作用研究

Dissolution effects on different disinfectants to the pipe material in dual water system

在管道分质供水工程中 ,不同类型消毒剂对管材的溶蚀作用缺乏系统研究。选择三种供水管材、三种消毒剂进行对比试验的结果表明 :对于同一种管材 ,不同类型杀菌剂对浸泡水TOC ,VOCs及口感的影响没有明显差别 ,但对于不同类型管材这些指标存在明显差别。纯净水在管道中产生的这些二次污染 ,虽然不足以引起相关水质指标超标 ,但在一定程度上会影响水的口感。建议在管道分质供水设计中 ,应根据所采用的净水工艺选择合适的管材 。

There is no available data on micro-solution of disinfectants to pipe materials in dual water distribution line. In this paper, pipes made of three materials and water samples disinfected by three disinfectants were selected to compare the dissolution effects. The results show that the effects of different disinfectants on the same pipe material are much less than that of the same disinfectant on different pipes. The TOC and VOC S in it are examined and also the taste of the immersion water is evaluated. It is obvious there are some secondary pollutants caused by pipe, although no indicator exceeded the allowable limit guided in national water quality standard except some sensitive preferences. We suggest that pipes used for dual distribution line have to be carefully selected according to the water purification techniques and used disinfectants to guarantee high quality of drinking water.