TY - JOUR
T1 - Degradation of Ethylbenzene in Aqueous Solution by Sodium Percarbonate Activated with EDDS–Fe(III) Complex
AU - Cui, Hang
AU - Gu, Xiaogang
AU - Lu, Shuguang
AU - Fu, Xiaori
AU - Zhang, Xiang
AU - Fu, George Y.
AU - Qiu, Zhaofu
AU - Sui, Qian
N1 - Publisher Copyright:
© 2016 Elsevier B.V.
PY - 2017/2/1
Y1 - 2017/2/1
N2 - 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 [rad]OH was the predominant species responsible for EB degradation even though both [rad]OH and O2−[rad] 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.
AB - 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 [rad]OH was the predominant species responsible for EB degradation even though both [rad]OH and O2−[rad] 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.
KW - Chemical oxidation
KW - EDDS-Fe(III) complex
KW - Ethylbenzene
KW - Groundwater remediation
KW - Sodium percarbonate
UR - https://digitalcommons.georgiasouthern.edu/civil-eng-facpubs/52
UR - https://www.sciencedirect.com/science/article/pii/S1385894716314309?via%3Dihub
U2 - 10.1016/j.cej.2016.10.029
DO - 10.1016/j.cej.2016.10.029
M3 - Article
SN - 1385-8947
VL - 309
JO - Chemical Engineering Journal
JF - Chemical Engineering Journal
ER -