氯化和臭氧预氧化处理对污水中溶解性有机物发光细菌急性毒性的影响  

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

作　　者：张华[1] 曲久辉[1] 刘会娟[1] 

机构地区：[1]环境水质学国家重点实验室中国科学院生态环境研究中心,北京100085

出　　处：《中国科学：化学》2011年第1期91-96,共6页SCIENTIA SINICA Chimica

基　　金：国家自然科学基金(50538090);国家创新群体基金(50621804);北京市节水科研项目的资助

摘　　要：考察了氯化和臭氧预氧化对污水中DOM的发光细菌急性毒性的影响.结果表明,臭氧预氧化处理后发光细菌的急性毒性显著增强.利用树脂吸附将臭氧预氧化前后的DOM分离为疏水性和亲水性等6种组分,对DOM的6种组分分别氯化,考察了氯化前后各组分的发光细菌急性毒性.结果发现,亲水性组分的比例在臭氧预氧化后明显增加,且亲水性有机物的急性毒性显著强于疏水性有机物.结合电位滴定和傅立叶红外分析发现,与疏水性有机物相比,亲水性有机物具有较高含量的ph-OH官能团.Effect of chlorination and ozone pre-oxidation on the photobacteria acute toxicity for dissolved organic matter （DOM） from sewage treatment plants was investigated in the study. Results showed that ozone pre-oxidation enhanced the photobacteria acute toxicity of the water samples. DOM before and after ozone pre-oxidation were 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 that hydrophobic organics. In view of potentiometric titration and fourier transform infra-red analysis, the hydrophilic organics showed a rather higher content of ph-OH structure than hydrophobic organics.

关 键 词：发光细菌急性毒性 DOM 亲水性有机物 疏水性有机物 

分 类 号：X703[环境科学与工程—环境工程]