重庆五座水厂水的有机物致突变活性比较

Comparison on the Mutagenic Activity of Raw Water and Finished Water of Five Waterworks in Chongqing City

采用固相萃取技术 (GDX -1 2 0大孔树脂 )于春、夏、冬季对以嘉陵江为水源的A厂和B厂、以长江为水源的C厂和D厂以及以两江汇水为水源的E厂提取进厂水与出厂水中的有机物 ,以Ames试验评估其致突变活性。结果表明 :①现行水处理工艺在低温季节及源水污染较为严重的情况下可降低出厂水的致突变活性 ,而在高温季节及源水污染不太严重的情况下可导致出厂水的致突变活性升高 ;②以嘉陵江为水源的水厂出水致突变危害均高于以长江为水源的水厂出水 ;③水中有机物的致突变活性以移码型为主 。

The waterworks A and B intake water from the Jialingjiang River,waterworks C and D from the Yangtse River,and waterworks E from the confluence of the two rivers.The solid extractive technique (amberlite GDX-120 resin) was used to extract respectively the organics from both raw water into and finished water from the five waterworks in the seasons of spring,summer and winter,and then the mutagenic activity of the organics was determined according to Ames assay.The results showed that 1) in the case of low temperature and heavily polluted source water,the current water treatment process may lower the mutagenic activity of finished water;while in the case of high temperature and slightly polluted source water,mutagenic activity of finished water may be raised;2) the finished water from waterworks A and B has more mutagenic hazard than that from waterworks C and D;3)the shift-mutagenic organics are the predominant pollutants and TA 98 strain is more sensitive than TA 100 strain.