污水二氧化氯和氯消毒过程中遗传毒性的变化及氨氮的影响  

Change in Genotoxicity of Wastewater During Chlorine Dioxide and Chlorine Disinfections and the Influence of Ammonia Nitrogen

作　　者：王丽莎[1] 胡洪营[1] 塔春红[1] 田杰[1] 王超[1] 藤江幸一 

机构地区：[1]清华大学环境科学与工程系环境模拟与污染控制国家重点联合实验室,北京100084 [2]日本丰桥技术科学大学生态工程系

出　　处：《环境科学》2007年第3期603-606,共4页Environmental Science

基　　金：NFSC-JST重大国际合作项目(20510076);国家自然科学基金项目(20277025)

摘　　要：采用umu遗传毒性测试方法考察了二氧化氯和氯消毒对几种城市污水生物处理出水遗传毒性的影响,发现当二氧化氯消毒剂从0mg/L增加到30mg/L时,几种污水的遗传毒性均先迅速降低后趋于稳定,而当氯消毒剂从0mg/L增加到30mg/L时,几种污水的遗传毒性的变化规律不同.进一步研究氨氮对污水消毒过程中遗传毒性变化的影响,发现氨氮对污水二氧化氯消毒过程中遗传毒性的变化规律没有显著影响,但是对污水氯消毒过程中遗传毒性的变化规律却起着至关重要的作用.当氨氮含量较小(<10～20mg/L)时,污水氯消毒后的遗传毒性小于消毒前;当氨氮含量较大时(>10～20mg/L),污水氯消毒后的遗传毒性大于消毒前.The effects of chlorine dioxide and chlorine disinfections on genotoxicity of different biologically treated sewage wastewater samples were studied by urnu-test. The experiment results showed that when chlorine dioxide dosage increased from 0 mg/L to 30 mg/L, the genotoxieity of wastewater first decreased rapidly and then tended to be stable, while when the chlorine dosage increased from 0 mg/L to 30 mg/L, the genotoxieity of wastewater changed diversely for different samples. It was then found that ammonia nitrogen did not affect the change of genotoxieity during chlorine dioxide disinfection of wastewater, while it greatly affected the change of genotoxieity during chlorine disinfection of wastewater. When the concentration of ammonia nitrogen was low （ 〈 10 - 20 mg/L）, the genotoxieity of wastewater decreased after chlorine disinfection, and when the concentration of ammonia nitrogen was high （ 〉 10 - 20 mg/L） , the genotoxieity of wastewater increased after chlorine disinfection.

关 键 词：污水再生利用 二氧化氯消毒 氯消毒 遗传毒性 氨氮 

分 类 号：X799.3[环境科学与工程—环境工程]