硬聚氯乙烯管材对自来水水质影响调查

Investigation on Tap Water Quality Effected by PVC-U Pipes

目的探讨硬聚氯乙烯 (PVC_U)管材对自来水水质的影响。方法对某PVC_U管材进行安全性评价 ,并对使用该管材的住宅小区的2个户外进水口和4个户内出水口水样的感官性状、一般化学指标、重金属、有机物指标、放射性指标进行检测及进行毒理学试验。结果该PVC_U管材浸泡水除Fe超标外 ,其余指标均达标。进水口与出水口水样各指标差异无显著性 ,出水口水样急性经口毒性试验、30天喂养试验、微核试验、Ames试验均阴性。结论PVC_U管材是安全卫生的供水管材。

Objective To study the effects of PVC_U pipes on tap water quality.Methods The safty assessment on a certain brand of PVC_U pipes was carried out. A residential quarter with this kind of PVC_U pipes for water supply was selected. Drinking water samples were collected from 2 pipeline inlets outside the quarter and 4 outlets inside the apartment. The indexes such as organoleptic indexes, general chemical indexes, heavy metals, organic compounds, radioactivity of the water samples were determined. The toxicological tests were carried out also. Results The sanitary indexes of the water samples for immersing PVC_U pipes except the content of ferrite accorded with the related national standards. No significant differences were observed in sanitary indexes of the water samples collected from inlets and outlets of pipeline for the apartment. The organic extracts of the water samples from the outlets of water supply system in the apartment showed negative results in acute oral toxicity test, 30_day feeding test, micronucleus test and Ames test. Conclusion PVC_U pipes were safe and hygenic for drinking water supply.