【摘要】 目的　了解不同消毒方法对自来水中有机浓集物致突变性的影响 ,为合理选择水处理工艺提供科学依据。方法　选择采用液氯、二氧化氯和臭氧消毒的水厂各 1家 ,于消毒前、后采水样各 1份以 10 ,2 0和 30 L/皿浓度进行 TA98- S9的 Ames试验。结果　液氯和二氧化氯消毒水样 MR值上升 ,液氯消毒后水样在 2 0和 30 L/皿时 MR>2且存在剂量 -反应关系 (r=0 .987,P<0 .0 5 ) ;二氧化氯消毒后水样在 10～ 30 L/皿时 MR>2 ,且有剂量 -反应关系 (r=0 .992 ,P<0 .0 5 ) ;臭氧消毒前后各剂量组 MR均 >2 ,无剂量 -反应关系 ,MR值消毒后较消毒前有所下降。结论　二氧化氯消毒能增强水样的有机浓集物的致变性 ,其次为液氯更多还原

【Abstract】 S Objective To explore the effeets of different water disinfection ways on mutagenicities of organic extracts from tap water and provide scientific basis for selecting water treatment technique and process Method The mutagenicities to TA98 strain of the organic extracts of water samples,collected from 3 water plants applied with water disinfection ways of liquid chlorine (Cl 2),chlorine dioxide (ClO 2) and ozone (O 3) respectively,and collected before and after the water disinfection,were determined by Ames test at the doses of 10 L,20 L and 30 L source water per plate without the exsitence of S 9 mixture Results The MR values of the water samples increased after the disinfection by Cl 2 and ClO 2 The water samples revealed MR values of more than 2 at doses of 20 L and 30 L source water per plate after disinfection by Cl 2 with a significant dose response relationship ( r=0 987,P <0 05) The water sample showed MR values of more than 2 at doses of 10~30 L source water per plate after disinfection by ClO 2 with a significant dose response relationship ( r=0 992,P <0 05) The MR values of water samples were all above 2 at each dose level before and after disinfection by ozone with no significant dose response relationships.Lower MR values were observed in water samples after disinfection by ozone compared with those before disinfection by ozone Conclusion ClO 2 disinfection revealed the most strongest capacity of enhencing the mutagenicity of the organic extracts in water sample,the next were Cl 2 disinfection更多还原