饮水有机浓集物致突变活性影响因素的研究

The Study on the Influence Foctors upon Mutagenicity of Organic Concentrates of Drinking Water

本文探讨饮水有机物浓集流速及加氯量对致突变活性的影响。试验表明，饮水有机物浓集流速控制在每分钟２倍树脂柱床体积时，可获得最佳致突变效果。当加氯量≥２０ｍｇ／Ｌ时，对ＴＡ９８±Ｓ９和ＴＡ１００—Ｓ９菌株有致突变活性，≤２ｍｇ／Ｌ时对ＴＡ９８±Ｓ９和ＴＡ１００±Ｓ９菌株无致突变活性。为最大限度减少致突变效应，在净水过程中保证流行病学安全前提下，减少加氯量和加氯次数是十分必要的。

This paper focuses on mutagenecity of drinking water in different flowrates passing XAD-2 colunms and with different chlorine dosages.The results show that the optimal mutagenic activities could be detected at a flowrate of 2 bedvolumes of XAD-2 column per minute. Ames test shows a positive result with TA98±S9 and TA 100 S9 at chlorine dosage≤20mg/L,and a negative mutagenic activities with TA98±S9 and TA 100 S9 at chlorine dosage≤2mg/L.In order to minimize the risk of mutagenic effects it is necessary for drinking water purification processes to decrease the frequences of chlorination and chlorine dosage in epidemiological safe conditions.