溶解性有机质DOM对甲硝唑光降解的影响研究  

Effects of Dissolved Organic Matter(DOM) On Photodegradation of Metronidazole

作　　者：杨兰兰[1,2,3] 魏群山[1,2,3] 李宗宸 徐龙凤[1,3] 付明来[2] 柳建设[1,3] 刘亚男[1,3] 

机构地区：[1]东华大学环境科学与工程学院,上海201620 [2]中国科学院城市环境研究所,福建厦门361021 [3]东华大学国家环境保护纺织工业污染防治工程技术中心,上海201620

出　　处：《广东化工》2016年第14期13-15,共3页Guangdong Chemical Industry

摘　　要：文章以甲硝唑为目标污染物,主要考察了甲硝唑初始浓度、光照强度、TiO_2投加量以及DOM浓度对甲硝唑光降解的影响。定量实验表明,当光照强度为3360 W/m^2、TiO_2的投加量为0.4 g/L时,20 mg/L的甲硝唑的降解效果最好。吸附实验表明,DOM与甲硝唑之间没有明显的直接作用特征。DOM存在条件下,其对甲硝唑的光降解和光催化降解均起到了抑制作用,随着DOM浓度的升高,抑制作用加强。Taking metronidazole as the target pollutant, the text mainly investigated the effects of the initial concentration of metronidazole, illumination intensity, the dosing quantity of TiO2 and the concentration of DOM on photodegradation of metronidazole. The results showed that when illumination intensity was 3360 W/m2 and the dosing quantity of TiO2 was 0.4 g/L, the degradation of 20 mg/L metronidazole were best within 60 min. Adsorption experiments showed that the DOM had no obvious characteristics of direct action with metronidazole. Under the presence of DOM, the photodegradation and photocatalytic degradation process of metronidazole were both inhibited, and the inhibition strengthened with the increase of concentration of DOM.

关 键 词：DOM 甲硝唑 TiO_2 

分 类 号：TQ463.53[化学工程—制药化工]