Effect of chlorination and ozone pre-oxidation on the photobacteria acute toxicity for dissolved organic matter from sewage treatment plants  

作　　者：ZHANG Hua QU JiuHui LIU HuiJuan 

机构地区：[1]State key Laboratory of Environmental Aquatic Chemistry,Research Center for Eco-Environmental Sciences,Chinese Academy of Sciences,Beijing 100085,China

出　　处：《Science China Chemistry》2010年第11期2394-2398,共5页中国科学(化学英文版)

基　　金：supported by the National Natural Science Foundation of China (50538090);Funds for Creative Research Groups of China (50621804);Scientific Research Program for Saving Water in Beijing:Research and Control on the Safety of Water Reuse

摘　　要：The effect of chlorination and ozone pre-oxidation on the photobacteria acute toxicity for dissolved organic matter(DOM) from sewage treatment plants was investigated in this study.The results show that ozone pre-oxidation enhanced the photobacteria acute toxicity of the water samples.DOM before and after ozone pre-oxidation was fractionated by resins into six kinds of hydrophobic and hydrophilic organics.The six fractions were chlorinated individually and the photobacteria acute toxicity before and after chlorination was tested.It was found that the percentage of hydrophilic organics in DOM significantly increased after ozone pre-oxidation and hydrophilic organics exhibited remarkably higher acute toxicity than hydrophobic organics.In view of potentiometric titration and fourier transform infrared(FTIR) analysis,the hydrophilic organics showed a rather higher content of ph-OH structures than hydrophobic organics.The effect of chlorination and ozone pre-oxidation on the photobacteria acute toxicity for dissolved organic matter(DOM) from sewage treatment plants was investigated in this study.The results show that ozone pre-oxidation enhanced the photobacteria acute toxicity of the water samples.DOM before and after ozone pre-oxidation was fractionated by resins into six kinds of hydrophobic and hydrophilic organics.The six fractions were chlorinated individually and the photobacteria acute toxicity before and after chlorination was tested.It was found that the percentage of hydrophilic organics in DOM significantly increased after ozone pre-oxidation and hydrophilic organics exhibited remarkably higher acute toxicity than hydrophobic organics.In view of potentiometric titration and fourier transform infrared(FTIR) analysis,the hydrophilic organics showed a rather higher content of ph-OH structures than hydrophobic organics.

关 键 词：photobacteria acute toxicity DOM hydrophilic organics hydrophobic organics 

分 类 号：X703[环境科学与工程—环境工程]