臭氧对供水管材的溶蚀作用

An Investigation of Dissolution of Ozone on Water Distribution Pipes

应用臭氧(O3)消毒,选用了17种管材进行了浸泡实验,并对浸泡水TOC、VOCs、亚硝酸盐、口感进行了分析。结果表明,这些管材均存在极其微弱的二次污染,且主要是有机微污染,而无机微污染不明显。产生这些有机微污染物的原因主要是水中所含杀菌剂溶蚀管材内壁所引起,且不同类型管材质量存在明显差别,质量最好的是不锈钢管材,其次是进口PE、PPR管材,而国产塑料材料管材在这方面质量不稳定。

In the present paper, 17 different kinds of drinking water distribution pipes were selected to do the experiment in which water was disinfected by ozone (O3),and TOC, VOCs, nitrite, taste and other water quality parameters were analyzed. The results showed that these pipes all have a weak pollution on the purified drinking water,mainly organic pollutants,and very few inorganic pollutants. These pollutants were caused mainly by O3 dissolved in the water which leads to a very weak dissolution on the wall of the pipes. Moreover,different pipes presented difference in the water quality parameters. Stainless Steel pipes have the best quality,the PE and PPR pipes made by imported materials have also a good quality,but the PE and PPR pipes made by domestic materials have a variable quality.