Genotoxicity removal of reclaimed water during ozonation

作     者：Xin Tang Qianyuan Wu Yang Yang Hongying Hu 

作者机构：Environmental Simulation and Pollution Control State Key Joint Laboratory State Environmental Protection Key Laboratory of Microorganism Application and Risk Control School of Environment Tsinghua University Shenzhen Laboratory of Microorganism Application and Risk Control Graduate School at Shenzhen Tsinghua University 

出 版 物：《Journal of Environmental Sciences》 (环境科学学报（英文版）)

年 卷 期：2014年第26卷第6期

页      面：1243-1248页

核心收录：

学科分类：083002[工学-环境工程] 090403[农学-农药学(可授农学、理学学位）] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 08[工学] 09[农学] 0904[农学-植物保护] 

基　　金：supported by the National Natural Science Foundation of China (No. 51138006) the National HighTech Research and Development Program (863) of China (No. SS2013AA061805) the Ministry of Environmental Protection of China (No. 201109015) the Collaborative Innovation Center for Regional Environmental Quality 

主　　题：ozonation genotoxicy specific ultraviolet absorbance fourier transform infrared spectroscopy 

摘      要：Genotoxicity in wastewater and reclaimed water now is gaining increased attention because of genotoxins＇ potential damage to the ecosystem and human health. The effect of ozonation on genotoxicity in reclaimed water was investigated. It was found that ozonation decreased the genotoxicy dramatically in three tertiary treatment plants. In the further batch ozonation experiment in laboratory, secondary effluent sample used exhibited the genotoxicity of （41.1 ± 4.1） μg 4NQO/L. Ozonation with a dose of 10 mg O3/L completely removed the genotoxicity in secondary effluent. However, after ozonation, the dissolved organic carbonvalue of the sample didn＇t change much but the specific ultraviolet absorbance （SUVA） value dropped sharply. With the help of Fourier transform infrared spectroscopy, ozonation was found to change chemical aliphatic carbon and C-O of the dissolved arganic matter, which might be the reason of the significant decreases of SUVA and genotoxicity.