The destruction of benzene by calcium peroxide activated with Fe(II) in water

Yunfei Xue; Xiaogang Gu; Shuguang Lu; Zhouwei Miao; Mark L. Brusseau; Minhui Xu; Xiaori Fu; Xiang Zhang; Zhaofu Qiu; Qian Sui

doi:10.1016/j.cej.2016.05.016

The destruction of benzene by calcium peroxide activated with Fe(II) in water

Yunfei Xue, Xiaogang Gu, Shuguang Lu, Zhouwei Miao, Mark L. Brusseau, Minhui Xu, Xiaori Fu, Xiang Zhang, Zhaofu Qiu, Qian Sui

Research output: Contribution to journal › Article › peer-review

60 Scopus citations

Abstract

The ability of Fe(II)-activated calcium peroxide (CaO₂) to remove benzene is examined with a series of batch experiments. The results showed that benzene concentrations were reduced by 20-100% within 30 min. The magnitude of removal was dependent on the CaO₂/Fe(II)/Benzene molar ratio, with much greater destruction observed for ratios of 4/4/1 or greater. An empirical equation was developed to quantify the destruction rate dependence on reagent composition. The presence of oxidative hydroxyl radicals (HO) and reductive radicals (primarily O₂^-) was identified by probe compound testing and electron paramagnetic resonance (EPR) tests. The results of the EPR tests indicated that the application of CaO₂/Fe(II) enabled the radical intensity to remain steady for a relatively long time. The effect of initial solution pH was also investigated, and CaO₂/Fe(II) enabled benzene removal over a wide pH range of 3.0-9.0. The results of radical scavenging tests showed that benzene removal occurred primarily by HO oxidation in the CaO₂/Fe(II) system, although reductive radicals also contributed. The intermediates in benzene destruction were identified to be phenol and biphenyl. The results indicate that Fe(II)-activated CaO₂ is a feasible approach for treatment of benzene in contaminated groundwater remediation.

Original language	English (US)
Pages (from-to)	187-193
Number of pages	7
Journal	Chemical Engineering Journal
Volume	302
DOIs	https://doi.org/10.1016/j.cej.2016.05.016
State	Published - Oct 15 2016

Keywords

Benzene
Calcium peroxide
Ferrous iron
Reactive oxygen species

ASJC Scopus subject areas

Chemistry(all)
Environmental Chemistry
Chemical Engineering(all)
Industrial and Manufacturing Engineering

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10.1016/j.cej.2016.05.016

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@article{440704fbba6e4389ad35652c291a2604,

title = "The destruction of benzene by calcium peroxide activated with Fe(II) in water",

abstract = "The ability of Fe(II)-activated calcium peroxide (CaO2) to remove benzene is examined with a series of batch experiments. The results showed that benzene concentrations were reduced by 20-100% within 30 min. The magnitude of removal was dependent on the CaO2/Fe(II)/Benzene molar ratio, with much greater destruction observed for ratios of 4/4/1 or greater. An empirical equation was developed to quantify the destruction rate dependence on reagent composition. The presence of oxidative hydroxyl radicals (HO) and reductive radicals (primarily O2-) was identified by probe compound testing and electron paramagnetic resonance (EPR) tests. The results of the EPR tests indicated that the application of CaO2/Fe(II) enabled the radical intensity to remain steady for a relatively long time. The effect of initial solution pH was also investigated, and CaO2/Fe(II) enabled benzene removal over a wide pH range of 3.0-9.0. The results of radical scavenging tests showed that benzene removal occurred primarily by HO oxidation in the CaO2/Fe(II) system, although reductive radicals also contributed. The intermediates in benzene destruction were identified to be phenol and biphenyl. The results indicate that Fe(II)-activated CaO2 is a feasible approach for treatment of benzene in contaminated groundwater remediation.",

keywords = "Benzene, Calcium peroxide, Ferrous iron, Reactive oxygen species",

author = "Yunfei Xue and Xiaogang Gu and Shuguang Lu and Zhouwei Miao and Brusseau, {Mark L.} and Minhui Xu and Xiaori Fu and Xiang Zhang and Zhaofu Qiu and Qian Sui",

note = "Funding Information: This study was financially supported by the grant from the National Natural Science Foundation of China ( 41373094 , 21577033 , 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 ). The contributions of Mark Brusseau were supported by the NIEHS Superfund Research Program (P42 ES04940). Publisher Copyright: {\textcopyright} 2016 Elsevier B.V.",

year = "2016",

month = oct,

day = "15",

doi = "10.1016/j.cej.2016.05.016",

language = "English (US)",

volume = "302",

pages = "187--193",

journal = "Chemical Engineering Journal",

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T1 - The destruction of benzene by calcium peroxide activated with Fe(II) in water

AU - Xue, Yunfei

AU - Gu, Xiaogang

AU - Lu, Shuguang

AU - Miao, Zhouwei

AU - Brusseau, Mark L.

AU - Xu, Minhui

AU - Fu, Xiaori

AU - Zhang, Xiang

AU - Qiu, Zhaofu

AU - Sui, Qian

N1 - Funding Information: This study was financially supported by the grant from the National Natural Science Foundation of China ( 41373094 , 21577033 , 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 ). The contributions of Mark Brusseau were supported by the NIEHS Superfund Research Program (P42 ES04940). Publisher Copyright: © 2016 Elsevier B.V.

PY - 2016/10/15

Y1 - 2016/10/15

N2 - The ability of Fe(II)-activated calcium peroxide (CaO2) to remove benzene is examined with a series of batch experiments. The results showed that benzene concentrations were reduced by 20-100% within 30 min. The magnitude of removal was dependent on the CaO2/Fe(II)/Benzene molar ratio, with much greater destruction observed for ratios of 4/4/1 or greater. An empirical equation was developed to quantify the destruction rate dependence on reagent composition. The presence of oxidative hydroxyl radicals (HO) and reductive radicals (primarily O2-) was identified by probe compound testing and electron paramagnetic resonance (EPR) tests. The results of the EPR tests indicated that the application of CaO2/Fe(II) enabled the radical intensity to remain steady for a relatively long time. The effect of initial solution pH was also investigated, and CaO2/Fe(II) enabled benzene removal over a wide pH range of 3.0-9.0. The results of radical scavenging tests showed that benzene removal occurred primarily by HO oxidation in the CaO2/Fe(II) system, although reductive radicals also contributed. The intermediates in benzene destruction were identified to be phenol and biphenyl. The results indicate that Fe(II)-activated CaO2 is a feasible approach for treatment of benzene in contaminated groundwater remediation.

AB - The ability of Fe(II)-activated calcium peroxide (CaO2) to remove benzene is examined with a series of batch experiments. The results showed that benzene concentrations were reduced by 20-100% within 30 min. The magnitude of removal was dependent on the CaO2/Fe(II)/Benzene molar ratio, with much greater destruction observed for ratios of 4/4/1 or greater. An empirical equation was developed to quantify the destruction rate dependence on reagent composition. The presence of oxidative hydroxyl radicals (HO) and reductive radicals (primarily O2-) was identified by probe compound testing and electron paramagnetic resonance (EPR) tests. The results of the EPR tests indicated that the application of CaO2/Fe(II) enabled the radical intensity to remain steady for a relatively long time. The effect of initial solution pH was also investigated, and CaO2/Fe(II) enabled benzene removal over a wide pH range of 3.0-9.0. The results of radical scavenging tests showed that benzene removal occurred primarily by HO oxidation in the CaO2/Fe(II) system, although reductive radicals also contributed. The intermediates in benzene destruction were identified to be phenol and biphenyl. The results indicate that Fe(II)-activated CaO2 is a feasible approach for treatment of benzene in contaminated groundwater remediation.

KW - Benzene

KW - Calcium peroxide

KW - Ferrous iron

KW - Reactive oxygen species

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DO - 10.1016/j.cej.2016.05.016

M3 - Article

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SN - 1385-8947

VL - 302

SP - 187

EP - 193

JO - Chemical Engineering Journal

JF - Chemical Engineering Journal

ER -

The destruction of benzene by calcium peroxide activated with Fe(II) in water

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