Fe(Ⅲ)-酒石酸盐配合物体系的光解特性  

Photolysis characteristics of Fe(Ⅲ)-tartrate complex system

作　　者：封享华[1] 牟娟[1] 丁世敏[1] 

机构地区：[1]长江师范学院化学化工学院,重庆408100

出　　处：《环境工程学报》2013年第7期2557-2562,共6页Chinese Journal of Environmental Engineering

基　　金：重庆市教委科学技术研究项目(KJ111311)

摘　　要：以Fe(Ⅲ)-酒石酸配合物体系光化学过程中产生的Fe(Ⅱ)和.OH为主要检测对象,探讨了Fe(Ⅲ)-酒石酸配合物体系光化学反应的基本规律及影响因素。结果表明,体系的光化学过程能产生Fe(Ⅱ)和.OH;产生Fe(Ⅱ)的速率远高于产生.OH的速率;Fe(Ⅱ)生成浓度在pH 3.50时最大,.OH则在pH 3.00时最大;配合物的光化学过程中会伴随pH的升高;在照度为3.6×103Lux的日光灯照射下,Fe(Ⅲ)-酒石酸盐配合物初级光解的速率常数为2.1×10-3S-1;Fe(Ⅱ)是高价重金属的主要还原剂,.OH是有机物的主要氧化剂。Taking Fe（Ⅱ） and ·OH produced in the photochemical process of Fe（Ⅲ）-tartrate as detecting objects, the photolysis discipline and influencing factors of Fe（Ⅲ）-tartrate complex system were investigated. The result shows that Fe（Ⅱ） and ·OH can be produced during illumination of Fe（Ⅲ）-tartrate system, and the producing rate of Fe（Ⅱ） is far faster than that of ·OH. Fe（Ⅱ） concentration can reach the maximum value at initial pH of 3.5, while the optimal pH is 3.0 for ·OH. pH value of the system increases during photochemical process. The rate constant of the first-order photolysis of Fe（Ⅲ）-tartrate is 2.1×10-3 S-1 under daylight lamp with illumination 3.6×103 Lux. Fe（Ⅱ） is the main reductant of high valent heavy metal and ·OH is the main oxidant of organic compounds.

关 键 词：氢氧自由基 Fe(Ⅱ) Fe(Ⅲ) 酒石酸盐光化学 

分 类 号：X703[环境科学与工程—环境工程]