Change in genotoxicity of wastewater during chlorine dioxide and chlorine disinfections and the influence of ammonia nitrogen |
| |
| Authors: | Wang Lisha Hu Hongying Wang Chao and Koichi Fujie |
| |
| Institution: | (1) Environmental Simulation and Pollution Control State Key Joint Laboratory, Department of Environmental Science and Engineering, Tsinghua University, Beijing, 100084, China;(2) Department of Ecological Engineering, Toyohashi University of Technology, Toyohashi, Japan |
| |
| Abstract: | The effects of chlorine dioxide and chlorine disinfections on the genotoxicity of different biologically treated sewage wastewater
samples were studied by umu-test. The experiment results showed that when chlorine dioxide dosage was increased from 0 to 30 mg/L, the genotoxicity of
wastewater first decreased rapidly and then tended to be stable, while when the chlorine dosage was increased from 0 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. |
| |
| Keywords: | wastewater reuse chlorine dioxide disinfection chlorine disinfection genotoxicity ammonia nitrogen |
| 本文献已被 万方数据 SpringerLink 等数据库收录！ |
|
