Critical role of oxygen for rapid degradation of organic contaminants in permanganate/bisulfite process

Bo Sun; Qianqian Bao; Xiaohong Guan

doi:10.1016/j.jhazmat.2018.03.024

Critical role of oxygen for rapid degradation of organic contaminants in permanganate/bisulfite process

Bo Sun, Qianqian Bao, Xiaohong Guan

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

47 Scopus citations

Abstract

Organic contaminants can be oxidized rapidly in permanganate/bisulfite (PM/BS) process due to generation of Mn(III)_aq. However, the influence of O₂ and its role in contaminants degradation in PM/BS process are poorly understood. Thus, the influence of O₂ concentration on phenol removal was quantified and isotopic oxygen tracers (¹⁸O-labeled water and ¹⁸O₂) were employed to further unravel the mechanisms of PM/BS process. The introduction of O₂ to PM/BS process appreciably improved phenol oxidation. Under oxic conditions the oxidation products of bisulfite included SO₄²⁻ and HSO₅⁻ while SO₄²⁻ was the single stable oxidation product under anaerobic conditions. The oxygen isotope labeling experiments confirmed that HSO₅⁻ originated from the oxidation of SO₃^[rad]− by O₂ to SO₅^[rad]− and the following reduction of SO₅^[rad]− by HSO₃⁻. Incorporation of oxygen isotope from H₂¹⁸O to MnO₂ due to the disproportionation of Mn(III)_aq was observed, which verified the generation of Mn(III)_aq in PM/BS process. The critical influence of O₂ on PM/BS process was mainly associated with rapid oxidation of SO₃^[rad]− by O₂ to SO₅^[rad]−, which otherwise competed with target contaminants for Mn(III)_aq. Oxygen from H₂O and/or O₂ can also be incorporated in the degradation products of organics in PM/BS process.

Original language	English
Pages (from-to)	157-164
Number of pages	8
Journal	Journal of Hazardous Materials
Volume	352
DOIs	https://doi.org/10.1016/j.jhazmat.2018.03.024
State	Published - 15 Jun 2018
Externally published	Yes

Keywords

Advanced oxidation
Bisulfite
Organic contaminant
Oxygen
Permanganate

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10.1016/j.jhazmat.2018.03.024

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@article{96058730a9aa49c1bf74c967a0e51831,

title = "Critical role of oxygen for rapid degradation of organic contaminants in permanganate/bisulfite process",

abstract = "Organic contaminants can be oxidized rapidly in permanganate/bisulfite (PM/BS) process due to generation of Mn(III)aq. However, the influence of O2 and its role in contaminants degradation in PM/BS process are poorly understood. Thus, the influence of O2 concentration on phenol removal was quantified and isotopic oxygen tracers (18O-labeled water and 18O2) were employed to further unravel the mechanisms of PM/BS process. The introduction of O2 to PM/BS process appreciably improved phenol oxidation. Under oxic conditions the oxidation products of bisulfite included SO42− and HSO5− while SO42− was the single stable oxidation product under anaerobic conditions. The oxygen isotope labeling experiments confirmed that HSO5− originated from the oxidation of SO3[rad]− by O2 to SO5[rad]− and the following reduction of SO5[rad]− by HSO3−. Incorporation of oxygen isotope from H218O to MnO2 due to the disproportionation of Mn(III)aq was observed, which verified the generation of Mn(III)aq in PM/BS process. The critical influence of O2 on PM/BS process was mainly associated with rapid oxidation of SO3[rad]− by O2 to SO5[rad]−, which otherwise competed with target contaminants for Mn(III)aq. Oxygen from H2O and/or O2 can also be incorporated in the degradation products of organics in PM/BS process.",

keywords = "Advanced oxidation, Bisulfite, Organic contaminant, Oxygen, Permanganate",

author = "Bo Sun and Qianqian Bao and Xiaohong Guan",

note = "Publisher Copyright: {\textcopyright} 2018 Elsevier B.V.",

year = "2018",

month = jun,

day = "15",

doi = "10.1016/j.jhazmat.2018.03.024",

language = "英语",

volume = "352",

pages = "157--164",

journal = "Journal of Hazardous Materials",

issn = "0304-3894",

publisher = "Elsevier B.V.",

}

TY - JOUR

T1 - Critical role of oxygen for rapid degradation of organic contaminants in permanganate/bisulfite process

AU - Sun, Bo

AU - Bao, Qianqian

AU - Guan, Xiaohong

PY - 2018/6/15

Y1 - 2018/6/15

N2 - Organic contaminants can be oxidized rapidly in permanganate/bisulfite (PM/BS) process due to generation of Mn(III)aq. However, the influence of O2 and its role in contaminants degradation in PM/BS process are poorly understood. Thus, the influence of O2 concentration on phenol removal was quantified and isotopic oxygen tracers (18O-labeled water and 18O2) were employed to further unravel the mechanisms of PM/BS process. The introduction of O2 to PM/BS process appreciably improved phenol oxidation. Under oxic conditions the oxidation products of bisulfite included SO42− and HSO5− while SO42− was the single stable oxidation product under anaerobic conditions. The oxygen isotope labeling experiments confirmed that HSO5− originated from the oxidation of SO3[rad]− by O2 to SO5[rad]− and the following reduction of SO5[rad]− by HSO3−. Incorporation of oxygen isotope from H218O to MnO2 due to the disproportionation of Mn(III)aq was observed, which verified the generation of Mn(III)aq in PM/BS process. The critical influence of O2 on PM/BS process was mainly associated with rapid oxidation of SO3[rad]− by O2 to SO5[rad]−, which otherwise competed with target contaminants for Mn(III)aq. Oxygen from H2O and/or O2 can also be incorporated in the degradation products of organics in PM/BS process.

AB - Organic contaminants can be oxidized rapidly in permanganate/bisulfite (PM/BS) process due to generation of Mn(III)aq. However, the influence of O2 and its role in contaminants degradation in PM/BS process are poorly understood. Thus, the influence of O2 concentration on phenol removal was quantified and isotopic oxygen tracers (18O-labeled water and 18O2) were employed to further unravel the mechanisms of PM/BS process. The introduction of O2 to PM/BS process appreciably improved phenol oxidation. Under oxic conditions the oxidation products of bisulfite included SO42− and HSO5− while SO42− was the single stable oxidation product under anaerobic conditions. The oxygen isotope labeling experiments confirmed that HSO5− originated from the oxidation of SO3[rad]− by O2 to SO5[rad]− and the following reduction of SO5[rad]− by HSO3−. Incorporation of oxygen isotope from H218O to MnO2 due to the disproportionation of Mn(III)aq was observed, which verified the generation of Mn(III)aq in PM/BS process. The critical influence of O2 on PM/BS process was mainly associated with rapid oxidation of SO3[rad]− by O2 to SO5[rad]−, which otherwise competed with target contaminants for Mn(III)aq. Oxygen from H2O and/or O2 can also be incorporated in the degradation products of organics in PM/BS process.

KW - Advanced oxidation

KW - Bisulfite

KW - Organic contaminant

KW - Oxygen

KW - Permanganate

UR - https://www.scopus.com/pages/publications/85054735652

U2 - 10.1016/j.jhazmat.2018.03.024

DO - 10.1016/j.jhazmat.2018.03.024

M3 - 文章

C2 - 29605803

AN - SCOPUS:85054735652

SN - 0304-3894

VL - 352

SP - 157

EP - 164

JO - Journal of Hazardous Materials

JF - Journal of Hazardous Materials

ER -

Critical role of oxygen for rapid degradation of organic contaminants in permanganate/bisulfite process

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Keywords

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