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 journalArticle

28 Citations (Scopus)

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 languageEnglish (US)
Pages (from-to)187-193
Number of pages7
JournalChemical Engineering Journal
Volume302
DOIs
StatePublished - Oct 15 2016

Fingerprint

Peroxides
Benzene
benzene
Calcium
calcium
Water
water
electron spin resonance
hydroxyl radical
Hydroxyl Radical
Paramagnetic resonance
Scavenging
Phenol
calcium peroxide
Remediation
Phenols
phenol
Groundwater
remediation
probe

Keywords

  • Benzene
  • Calcium peroxide
  • Ferrous iron
  • Reactive oxygen species

ASJC Scopus subject areas

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

Cite this

The destruction of benzene by calcium peroxide activated with Fe(II) in water. / Xue, Yunfei; Gu, Xiaogang; Lu, Shuguang; Miao, Zhouwei; Brusseau, Mark L; Xu, Minhui; Fu, Xiaori; Zhang, Xiang; Qiu, Zhaofu; Sui, Qian.

In: Chemical Engineering Journal, Vol. 302, 15.10.2016, p. 187-193.

Research output: Contribution to journalArticle

Xue, Yunfei ; Gu, Xiaogang ; Lu, Shuguang ; Miao, Zhouwei ; Brusseau, Mark L ; Xu, Minhui ; Fu, Xiaori ; Zhang, Xiang ; Qiu, Zhaofu ; Sui, Qian. / The destruction of benzene by calcium peroxide activated with Fe(II) in water. In: Chemical Engineering Journal. 2016 ; Vol. 302. pp. 187-193.
@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",
year = "2016",
month = "10",
day = "15",
doi = "10.1016/j.cej.2016.05.016",
language = "English (US)",
volume = "302",
pages = "187--193",
journal = "Chemical Engineering Journal",
issn = "1385-8947",
publisher = "Elsevier",

}

TY - JOUR

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

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

UR - http://www.scopus.com/inward/record.url?scp=84969135097&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84969135097&partnerID=8YFLogxK

U2 - 10.1016/j.cej.2016.05.016

DO - 10.1016/j.cej.2016.05.016

M3 - Article

AN - SCOPUS:84969135097

VL - 302

SP - 187

EP - 193

JO - Chemical Engineering Journal

JF - Chemical Engineering Journal

SN - 1385-8947

ER -