[二氧化氯和氯消毒过程中废水遗传毒性的变化及氨氮的影响]
[Change in genotoxicity of wastewater during chlorine dioxide and ahlorine disinfections and the influence of ammonia nitrogen].
作者信息
Wang Li-Sha, Hu Hong-Ying, Ta Chun-Hong, Tian Jie, Wang Chao, Koichi Fujie
机构信息
Environmental Simulation and Pollution Control State Key Joint Laboratory, Department of Environmental Science and Engineering, Tsinghua University, Beijing 100084, China.
出版信息
Huan Jing Ke Xue. 2007 Mar;28(3):603-6.
The effects of chlorine dioxide and chlorine disinfections on genotoxicity of different biologically treated sewage wastewater samples were studied by umu-test. The experiment results showed that when chlorine dioxide dosage increased from 0 mg/L to 30 mg/L, the genotoxicity 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 genotoxicity of wastewater changed diversely for different samples. It was then found that ammonia nitrogen did not affect the change of genotoxicity during chlorine dioxide disinfection of wastewater, while it greatly affected the change of genotoxicity during chlorine disinfection of wastewater. When the concentration of ammonia nitrogen was low (< 10 - 20 mg/L), the genotoxicity of wastewater decreased after chlorine disinfection, and when the concentration of ammonia nitrogen was high (> 10 - 20 mg/L), the genotoxicity of wastewater increased after chlorine disinfection.
采用umu试验研究了二氧化氯和氯消毒对不同生物处理后污水废水样品遗传毒性的影响。实验结果表明，当二氧化氯投加量从0mg/L增加到30mg/L时，废水的遗传毒性先迅速降低然后趋于稳定，而当氯投加量从0mg/L增加到30mg/L时，不同样品废水的遗传毒性变化各异。随后发现，氨氮在二氧化氯消毒废水过程中不影响遗传毒性的变化，而在氯消毒废水过程中对遗传毒性的变化影响很大。当氨氮浓度较低（<10 - 20mg/L）时，氯消毒后废水的遗传毒性降低，当氨氮浓度较高（>10 - 20mg/L）时，氯消毒后废水的遗传毒性增加。
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