Fe(Ⅲ)/苹果酸/H_2O_2体系对有机物的光降解特性研究  

Characteristics of photodegradation of organic pollutants in the ferric/malate/H_2O_2 system

作　　者：丁世敏[1] 刘元华[1] 封享华[1] 吴峰[2] 

机构地区：[1]长江师范学院化学及环境科学系,重庆408100 [2]武汉大学环境科学系,武汉430072

出　　处：《环境科学学报》2010年第9期1839-1845,共7页Acta Scientiae Circumstantiae

基　　金：国家自然科学基金委中俄国际合作项目(No.20611120016)~~

摘　　要：系统研究了可见光照射下染料橙黄Ⅱ在Fe(Ⅲ)/苹果酸/H2O2体系中的脱色情况,考查了光源、pH值、Fe(Ⅲ)、苹果酸、H2O2及染料初始浓度等因素对橙黄Ⅱ脱色效率的影响.结果表明,Fe(Ⅲ)/苹果酸/H2O2体系在可见光照射下能有效实现橙黄Ⅱ的脱色,在pH为5.0的条件下仍然具有较强的降解有机物的能力.该体系对橙黄Ⅱ的脱色率高于Fe(Ⅲ)/H2O2体系或Fe(Ⅲ)/苹果酸体系,光反应符合表观一级反应动力学规律.随着光强的增加,橙黄Ⅱ的脱色率增大.太阳光是该体系的有效光源,本体系具有利用太阳光的潜力.The decolouration of the dye Orange Ⅱ in the Fe（Ⅲ）/malate /H2O2 system under irradiation with visible light was systematically studied.We investigated the effect of different factors such as light source and pH as well as the initial concentration of Fe（Ⅲ）,malic acid,H2O2 and Orange Ⅱ on the efficiency of decolouration of Orange Ⅱ.The results show that Orange Ⅱ can be photo-degraded effectively in the Fe（Ⅲ）/malate /H2O2 system under irradiation with visible light and that the Fe（Ⅲ）/malate/H2O2 system still strongly degrades organic pollutants even at an initial pH of 5.0.The decolouration efficiency of Orange Ⅱ in the combined Fe（Ⅲ）/malate/H2O2 system with the initial pH value of 5.0 is higher than that in the Fe（Ⅲ）/ H2O2 system or the Fe（Ⅲ）/malate system.The photoreaction follows a pseudo-first order kinetic law.The decolouration efficiency of Orange Ⅱ increases as light intensity increases.Sunlight is an effective visible light source for the Fe（Ⅲ）/malate/H2O2 system,so this system has the potential to be applied using sunlight.

关 键 词：Fe(Ⅲ) 苹果酸 H2O2 光降解 橙黄Ⅱ 脱色 

分 类 号：X131[环境科学与工程—环境科学]