不同形态氮对水中4,4′-二溴联苯光解的影响  

PHOTOLYTIC REACTION OF 4,4′-DIBROMBIPHENYL IN WATER WITH DIFFERENT FORM OF N

作　　者：张敏利[1] 刘国光[1,2] 张楠[1] 何占伟[1] 井文杰[1] 

机构地区：[1]河南师范大学化学与环境科学学院,黄淮水污染与控制省部共建教育部重点实验室,新乡453007 [2]广东工业大学环境科学与工程学院,广州510006

出　　处：《环境化学》2011年第3期604-608,共5页Environmental Chemistry

基　　金：国家自然科学基金项目(No.20677012);河南省创新人才工程资助项目(教高[2001]513号)

摘　　要：模拟研究环境中不同形态氮转化对水中4,4′-二溴联苯光解的影响.结果表明,4,4′-二溴联苯的光解反应符合一级动力学规律.NO-3、NO-2的存在均对4,4′-二溴联苯的光解有抑制作用,抑制作用的发生是NO-3、NO2-与4,4′-二溴联苯对光辐射的竞争性吸收作用引起的,NO-2对4,4′-二溴联苯的抑制作用强于NO-3.在低pE值时,随着pE值升高,NH+4向NO2-转化,对4,4′-二溴联苯光解的抑制作用增强;而在高pE值时,NO2-向NO-3转化,随着pE值升高,对4,4′-二溴联苯光解的抑制作用减弱.The effect of nitrogen transformation on the photolysis of 4,4′-dibrombiphenyl in water was studied in this paper.The results showed that the photolysis of 4,4′-dibrombiphenyl followed first-order kinetics.Because of the competitive adsorption for light,both NO-3 and NO-2 inhibited the photolysis of 4,4′-dibrombiphenyl and NO-2 had stronger inhibition.In low pE value solutions,the inhibition increased along with the increasing pE value for the transformation from NH＋4 to NO-2;while in high pE value solutions,with the transformation from NO-2 to NO-3,the effect was reduced.

关 键 词：4 4′-二溴联苯 光解 硝酸根 亚硝酸根 PE 

分 类 号：X52[环境科学与工程—环境工程]