文献类型：期刊文献

英文题名：Degradation of ethylbenzene in aqueous solution by sodium percarbonate activated with EDDS-Fe(III) complex

作者：Cui, Hang[1];Gu, Xiaogang[1];Lu, Shuguang[1];Fu, Xiaori[1];Zhang, Xiang[1];Fu, George Y.[2];Qiu, Zhaofu[1];Sui, Qian[1]

机构：[1]East China Univ Sci & Technol, State Environm Protect Key Lab Environm Risk Asse, Shanghai 200237, Peoples R China;[2]Georgia Southern Univ, Dept Construct Management & Civil Engn Technol, Statesboro, GA 30460 USA

年份：2017

卷号：309

起止页码：80

外文期刊名：CHEMICAL ENGINEERING JOURNAL

收录：;EI(收录号：20164302953947);WOS:【SCI-EXPANDED(收录号:WOS:000389166400010)】；

基金：This study was financially supported by the grant from the National Natural Science Foundation of China (Nos. 41373094 and 51208199), Natural Science Foundation of Shanghai (16ZR1407200), China Postdoctoral Science Foundation (2015M570341), and the Fundamental Research Funds for the Central Universities (222201514339 and 22A201514057).

语种：英文

外文关键词：Ethylbenzene; Sodium percarbonate; EDDS-Fe(III) complex; Chemical oxidation; Groundwater remediation

摘要：Ethylbenzene (EB) degradation performance in (S,S)-ethylenediamine-N,N-disuccinic acid (EDDS) chelated Fe(III) activated sodium percarbonate (SPC) system was investigated in this study. The effects of various factors, such as the dosages of SPC and Fe(III), molar ratio of EDDS/Fe(III), anions (Cl-, HCO3-, SO42-, and NO3-) concentration, natural organic matters (NOM), and initial solution pH were evaluated. The results showed that the addition of EDDS remarkably improved the EB removal in Fe(III)/SPC system. Both HCO3- anions and NOM had significantly inhibitive effect, while the influence of SO42-, Cl- and NO3- could be negligible on EB degradation. The EB removal was inhibited at extremely low and high initial solution pH. Moreover, the results of free radical probe tests, scavenger tests and electron paramagnetic resonance (EPR) detection indicated that (OH)-O-center dot was the predominant species responsible for EB degradation even though both (OH)-O-center dot and O-2(-). were generated in the SPC/EDDS-Fe(III) system. The oxidation products were analyzed and possible EB degradation pathways were proposed. In conclusion, this study provides an important insight into the application of SPC/EDDS-Fe(III) system in the removal of EB contaminant, especially for in situ remediation of BTEX-contaminated groundwater. (C) 2016 Elsevier B.V. All rights reserved.