【摘要】 本文用Ames试验检测了成都市第五水厂不同季节原水和出厂水有机浓集液的致突变性。结果:原水均未检出致突变性;出厂水在TA₉₈的检测中均呈阳性,其强度为平水期>丰水期>枯水期;在TA₁₀₀检测中,平水期为阴性,丰水期和枯水期的致突变性强度无明显差异。结合现场调查,建议研究取消预氯化和改良混凝条件在防止致突变性中的效果。更多还原

【Abstract】 A study of mutagenic activity of organic concentrates in water sample from the Fifth Water Plant of Chengdu City was canried out by using Ames test during three different Periods of one year. The results showed that. ( 1 ) no mutagenic activity was detected in raw water concentrates with either TA98 or TA100 strain among any of the periods; ( 2 ) mutagenic activity was detected in all finished water concentrates with TA98. The order of the mutagenic intensity determined by the regressicn line slopes of dose-effect relationship was as following: the period of mean rainfall>the period of abundant rainfall>the period of lowest rainfa11. Under the test of TA100 there were signi-fieantly positive reactions with the water sample concentrates from both the mean and abundant rainfall periods, but not the dry period. The results, along with a consideration of water purification system,lead us to propose to study the effect of terminating prechlorination and improving coagulative conditions in order to decrease the mutagenic activity of Chengdu drinking water.更多还原