电-Fenton法降解青霉素的动力学研究  

KINETICS OF PENICILLIN G DEGRADATION BY ELECTRO-FENTON PROCESS

作　　者：黄昱[1] 李小明[1] 杨麒[1] 曾光明[1] 张振[1] 

机构地区：[1]湖南大学环境科学与工程学院,长沙410082

出　　处：《环境化学》2007年第5期618-621,共4页Environmental Chemistry

基　　金：国家自然科学基金项目(50478054);国际科技合作重点项目(2004DFA06200);长沙市科技计划重点项目(K051132-72);新世纪优秀人才支持计划资助(NCET-04-0770)

摘　　要：采用电-Fenton法处理青霉素钠(Penicillin Gsodium,PGN)模拟废水,当T=20℃,pH=3时,投加0.5g.l-1FeSO4和0.2ml.l-1H2O2,在0.6A电流下降解青霉素钠废水(100mg·l-1),20min后青霉素钠去除率为79%,40min后去除率为95%.拟合实验数据得到青霉素钠降解反应的速率方程式为:-d[PGN]/dt=2.35×106exp(-32869.4/RT)[Fe2+]0.53[H2O2]0.8[PGN]1.14反应速率常数和反应级数表明,初始阶段降解反应进行非常迅速,且H2O2浓度比Fe2+浓度对电-Fenton降解反应的影响重要.The degradation of penicillin G sodium （PGN） simulate wastewater by electro-Fenton has been investigated. Operating at T = 20℃, pH = 3, Fe^2＋ concentration = 0. 5g·l^-1 , H2O2 concentration = 0. 2ml·l^-1, PGN concentration = 100mg·l^-1 and electric current =0. 6A, about 79% of PGN was removed at 20rain, and 95% of PGN was removed at 40min. The overall equation for PGN degradation by electro-Fenton process is： - d [ PGN ]/dt = 2. 35×10^6 exp [ - 32869. 4/RT] [ Fe^2＋]^0. 53 [ H2O2 ]^0.8 [ PGN ]^1. 14 The reaction rate constant and reaction order indicate that the reaction rate is very fast and the effect of initial H2O2 concentration is greater than initial Fe^2＋ concentration on PGN degradation bv electro-Fenton.

关 键 词：电-FENTON 青霉素钠 动力学 

分 类 号：X132[环境科学与工程—环境科学]