不同预氧化工艺对水源水中新兴污染物的降解效能

Comparison of Degradation Efficiency of Multiple Emerging Pollutants in Source Water by Different Preoxidation Processes

以上海市某水源地原水为研究对象,针对水源水中存在的抗生素和农药等特征污染物,研究了不同预氧化过程对特征污染物的去除效果。研究发现:相同剂量氧化剂(0.2~0.8 mg·L-1)条件下抗生素的去除效果顺序为臭氧>高锰酸钾>自由氯;随着氧化剂投加量增大,抗生素的去除率也提高;随着pH增大,高锰酸钾去除抗生素的能力先上升后下降,而自由氯和臭氧的去除能力则逐渐增加。相同剂量的氧化剂对有机氯农药的去除效果顺序为臭氧>高锰酸钾>自由氯;随着pH增大,高锰酸钾对有机农药的去除能力下降,臭氧的去除能力增加,而自由氯的去除能力基本不变。

Taking raw water from a water source in Shanghai as the research object,the effects of different pre-oxidation processes on the removal of characteristic pollutants were studied for the characteristic pollutants such as antibiotics and pesticides present in the source water. This study found that the ability of the removal of antibiotics under the same dose(0.2 ~ 0.8 mg·L-1) of oxidant is ozone > potassium permanganate > free chlorine;the more dosage of each oxidant,the higher the removal rate of antibiotics. The ability of potassium permanganate to remove antibiotics first rises and then falls with pH increasing,while free chlorine and ozone gradually increases. The ability of removal of organic chlorine pesticides under the same dose oxidant is ozone > potassium permanganate > free chlorine. With the increase of pH, the removal ability of potassium permanganate to organic chlorine pesticides decreases,and the ability to remove ozone increases. The removal ability of free chlorine unchanged.