UV/Fe(Ⅲ)-富马酸盐体系对印染废水中橙黄Ⅱ的降解效果  

Decolorization of OrangeⅡin Fe( Ⅲ)-Fumarate System Under Ultraviolet Radiation

作　　者：孙杰[1] 曾沛[1] 张晗[1] 

机构地区：[1]中南民族大学环境工程研究所,湖北武汉430074

出　　处：《环境科学研究》2015年第1期82-87,共6页Research of Environmental Sciences

基　　金：湖北省自然科学基金项目(2008CDB400);武汉市科学技术计划项目(201051824567)

摘　　要：为研究Fe（Ⅲ）-富马酸盐体系对染料废水的降解效果,在紫外光照射下进行Fe（Ⅲ）-富马酸盐体系中橙黄Ⅱ的光氧化反应试验,考察溶液中初始c〔Fe（Ⅲ）〕、ρ（橙黄Ⅱ）和c（富马酸钠）及溶液p H对橙黄Ⅱ去除率的影响.结果表明,当溶液p H为3-7时,Fe（Ⅲ）-富马酸盐体系对橙黄Ⅱ的去除率随着溶液p H的减小而增大.当溶液中c〔Fe（Ⅲ）〕为25μmol/L、ρ（橙黄Ⅱ）为25mg/L、c（富马酸钠）为250μmol/L、p H为3时、光照反应50 min后橙黄Ⅱ的去除率接近于100%,TOC去除率接近60%.橙黄Ⅱ的去除率随溶液中初始c〔Fe（Ⅲ）〕的增加而逐渐升高,而初始c（富马酸钠）的变化对橙黄Ⅱ的去除率影响不显著.动力学分析表明,橙黄Ⅱ光降解过程符合准一级动力学方程.试验采用荧光法验证了体系反应过程中·OH的产生,有助于对橙黄Ⅱ降解机理的进一步研究.Photo-oxidation of the dye Orange Ⅱ was studied in the Fe（ Ⅲ）-fumarate system under UV irradiation. The effects of pH value and initial concentrations of Fe（ Ⅲ ） , fumarate and Orange Ⅱ were also investigated. The results showed that, lower solution pH in the range of 3.0-7.0 favors the photooxidation in the Fe（ Ⅲ ）-fumarate system and the removal rate of Orange Ⅱ increased with increasing initial concentration of Fe（Ⅲ ）. After 50 minutes, the decolorization efficiency of OrangeⅡ and TOC solutions reached 100% and 60% , respectively, with pH was 3, c（Fe（Ⅲ）） was 25 μmol/L, c（fumarate） was 250 μmol/L and p（Orange Ⅱ ） was 25 mg/L. The effect of initial concentrations of fumarate was not obvious on the decolorization rate of Orange Ⅱ. Under laboratory conditions, the photo-oxidation of Orange Ⅱ followed the pseudo first order reaction. Fluorescence method was taken to confirmed the production of hydroxyl radicals in the Fe（ m）-fumarate system under UV radiation, and it was helpful for the study of Orange Ⅱ decolorization mechanism.

关 键 词：Fe(Ⅲ)-富马酸盐 橙黄Ⅱ 光氧化 ·OH 动力学 

分 类 号：X703[环境科学与工程—环境工程]