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

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 from sewage treatment plants

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.