Fenton process for degradation of selected chlorinated aliphatic hydrocarbons exemplified by trichloroethylene,1,1-dichloroethylene and chloroform

作     者：Zhimin QIANG Weiwei BEN Chin-Pao HUANG 

作者机构：Research Center of Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China Department of Civil and Environmental EngineeringUniversity of DelawareNewarkDE 19716USA 

出 版 物：《Frontiers of Environmental Science & Engineering》 (环境科学与工程前沿（英文）)

年 卷 期：2008年第2卷第4期

页      面：397-409页

核心收录：

学科分类：0830[工学-环境科学与工程（可授工学、理学、农学学位）] 081704[工学-应用化学] 07[理学] 08[工学] 0817[工学-化学工程与技术] 070303[理学-有机化学] 0703[理学-化学] 

基　　金：The authors greatly appreciate the financial support from the Department of Energy,USA(Grant No.DE-FG07-96ER14716) This study was also supported by the National Key Technologies R&D Program funded by the Ministry of Science and Technology of China(Grant No.2006BAJ08B02) 

主　　题：Fenton’s reagent trichloroethylene 1,1-dichloroethylene chloroform degradation dechlorination 

摘      要：The degradation of selected chlorinated aliphatic hydrocarbons(CAHs)exemplified by trichloroethylene(TCE),1,1-dichloroethylene(DCE),and chloroform(CF)was investigated with Fenton oxidation *** results indicate that the degradation rate was primarily affected by the chemical structures of organic *** radicals(·OH)preferred to attack the organic contaminants with an electron-rich structure such as chlorinated alkenes(i.e.,TCE and DCE).The dosing mode of Fenton’s reagent,particularly of Fe^(2+),significantly affected the degradation efficiency of studied organic compound.A new“time-squaredkinetic model,C=C_(oexp)(-k_(obst)^(2)),was developed to express the degradation kinetics of selected *** model was applicable to TCE and DCE,but inapplicable to CF due to their varied reaction rate constants towards·*** release was monitored to examine the degree of dechlorination during the oxidation of selected *** was more easily dechlorinated than DCE and *** acid(DCAA)was identified as the major reaction intermediate in the oxidation of TCE,which could be completely removed as the reaction *** reaction intermediates or byproducts were identified in the oxidation of DCE and *** on the identified intermediate,the reaction mechanism of TCE with Fenton’s reagent was proposed.