水溶液中1,3,6,8-四溴咔唑的光降解研究  

Photodegradation of 1,3,6, 8 -tetrabromocarbazole in aqueous solution

作　　者：周珊珊 李超杰 ZHOU Shanshan;LI Chaojie(College of Environment,Zhejiang University of Technology,Hangzhou 310014,China)

机构地区：[1]浙江工业大学环境学院,浙江杭州310014

出　　处：《浙江工业大学学报》2024年第5期586-590,共5页Journal of Zhejiang University of Technology

基　　金：国家自然科学基金资助项目(C129018288)。

摘　　要：多卤代咔唑作为一种新型有机污染物,具有持久性、生物积累性和类二噁英毒性等持久性污染物的典型特征。选取1,3,6,8四溴咔唑为研究对象,通过紫外光照实验,探讨了助溶剂体积分数、溶剂种类,以及1,3,6,8四溴咔唑初始质量浓度和腐殖酸质量浓度等因素对1,3,6,8四溴咔唑降解的影响。研究结果表明:1,3,6,8四溴咔唑在溶液中的降解过程R 2大于0.953,符合一级动力学规律。助溶剂乙腈的增加可加速1,3,6,8四溴咔唑的降解;溶剂种类对1,3,6,8四溴咔唑的降解影响显著,有机溶剂使1,3,6,8四溴咔唑降解半衰期骤减;初始质量浓度的增加使1,3,6,8四溴咔唑降解速率减慢;低质量浓度的腐殖酸可促进1,3,6,8四溴咔唑的降解,高质量浓度的腐殖酸则抑制其光解。Polyhalogenated carbazole,a new type of organic pollutant,has the typical characteristics of persistent organic pollutants,such as persistence,bioaccumulation and dioxin-like toxicity.Herein,we investigated the effects of solvent type,initial concentration of substrate,and the amount of cosolvent and humic acid on the degradation of 1,3,6,8 tetrabromocarbazole by UV irradiation experiments.The results showed that the R 2 value of the degradation process in solution is greater than 0.953,indicating conformity to the first-order kinetic law.Increasing the cosolvent concentration accelerated the degradation of 1,3,6,8 tetrabromocarbazole.The type of solvent significantly affected the degradation,with organic solvent sharply decreasing the degradation half-life of 1,3,6,8 tetrabromocarbazole.Higher initial concentrations slowed the degradation rate.Low levels of humic acid promoted the degradation,while high levels inhibited photolysis.

关 键 词：卤代咔唑 1 3 6 8-四溴咔唑 紫外光 光降解 

分 类 号：X502[环境科学与工程—环境工程]