高级氧化技术降解人工甜味剂糖精钠  

Degradation of Artificial Sweetener Saccharin Sodium by Advanced Oxidation Technology

作　　者：陈胜文[1] 张鸿雁[1] 李文超[1] 谢洪勇[1] 

机构地区：[1]上海第二工业大学城市建设与环境工程学院,上海201209

出　　处：《上海第二工业大学学报》2013年第4期258-263,共6页Journal of Shanghai Polytechnic University

基　　金：上海第二工业大学培育学科建设项目(No.XXKPY1303)资助

摘　　要：分别应用TiO_2光催化氧化和Photo-Fenton氧化两种高级氧化技术降解环境新型污染物——人工甜味剂糖精钠(Saccharin Sodium,SAC)。通过高效液相色谱(HPLC)检测糖精钠浓度,结果表明两种方法都可以有效降解糖精钠,TiO_2光催化降解过程符合一级降解动力学,并得出该体系最佳条件:500 W汞灯、0.04 gTiO_2和pH=7。Photo-Fenton体系降解速率受糖精钠的初始浓度、H_2O_2浓度和Fe^(2+)浓度配比的影响,体系的最佳浓度配比为:CsAC:cH_2O_2:c_(Fe^(2+))=5:60:1;降解过程中总有机碳逐渐降低,最终降至92%左右,说明降解过程中有机物被矿化或被转化为CO_2。The advanced oxidation processes of photocatalytic oxidation and Photo-Fenton oxidation were used in degradation of emerg- ing pollutants artificial sweetener saccharin sodium. The concentration of saccharin sodium was determined by HPLC. The results showed both photocatalytic oxidation and Photo-Fenton oxidationcan had an effective degradation of saccharin sodium. The degrada- tion process was followed the first-order reaction. The best conditions of photocatalytic oxidation system： 500W mercury lamp, 0.04 g TiO2 and pH=7, and the best concentration ratio ofphoto-Fenton was csac ： cn2o2 ： CFe：~＋ = 5 ： 60 ： 1. The total organic carbon （TOC） of sample has significantly reduced to about 92 % by the two systems, which shows that the organics have been transformed to COz or mineralized during the degradation process.

关 键 词：人工甜味剂 糖精钠 高级氧化法 TIO2光催化氧化 Photo FENTON 

分 类 号：X13[环境科学与工程—环境科学]