电化学反应器中Fenton试剂分解4-硝基酚动力学  

Kinetics of 4-nitrophenol decomposition by Fenton’s reagent in flow electrochemical reactor

作　　者：张晖 蒋明[1] 费成志[1] 张道斌[1] 

机构地区：[1]武汉大学环境工程系,湖北武汉430079

出　　处：《化工学报》2008年第3期597-601,共5页CIESC Journal

基　　金：教育部留学回国人员科研启动基金项目([2001]498);湖北省科技攻关计划项目(2003AA307B01)~~

摘　　要：4-Nitrophenol was decomposed by Fenton’s reagent in a flow electrochemical reactor, and the effects of Fenton’s reagent dosage, molar ratio of Fe(Ⅱ) to H2O2, initial pH, and H2O2 feeding time on the removal rate of 4-nitrophenol were investigated.The reaction system was modeled as a plug flow reactor (PFR) in series with a continuous stirred tank reactor (CSTR), and the pseudo-first order rate constant of 4-nitrophenol removal was determined from the model.The pseudo-first order rate constant increased with the increase of Fenton’s reagent dosage at a fixed molar ratio of Fe(Ⅱ) to H2O2, but decreased with the increase of H2O2 feeding time at a fixed Fenton’s reagent dosage.There existed an optimal molar ratio of Fe(Ⅱ) to H2O2 or initial pH for the pseudo-first order rate constant of 4-nitrophenol removal.4-Nitrophenol was decomposed by Fenton’s reagent in a flow electrochemical reactor, and the effects of Fenton＇s reagent dosage, molar ratio of Fe （Ⅱ ） to H2O2, initial pH, and H2O2 feeding time on the removal rate of 4-nitrophenol were investigated. The reaction system was modeled as a plug flow reactor （PFR） in series with a continuous stirred tank reactor （CSTR）, and the pseudo-first order rate constant of 4-nitrophenol removal was determined from the model. The pseudo-first order rate constant increased with the increase of Fenton＇s reagent dosage at a fixed molar ratio of Fe （ Ⅱ） to H2O2, but decreased with the increase of H2O2 feeding time at a fixed Fenton＇s reagent dosage. There existed an optimal molar ratio of Fe （Ⅱ） to H2O2 or initial pH for the pseudo-first order rate constant of 4-nitrophenol removal.

关 键 词：4-硝基酚 FENTON试剂 高级氧化技术 动力学 

分 类 号：X703.1[环境科学与工程—环境工程]