Comparison of sulfate and hydroxyl radical based advanced oxidation of phenol

Tugba Olmez-Hanci; Idil Arslan-Alaton

doi:10.1016/j.cej.2012.11.007

Comparison of sulfate and hydroxyl radical based advanced oxidation of phenol

Tugba Olmez-Hanci^*, Idil Arslan-Alaton

^*Corresponding author for this work

Department of Environmental Engineering

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

591 Citations (Scopus)

Abstract

UV-C photo-assisted persulfate (PS), hydrogen peroxide (H₂O₂) and peroxymonosulfate (PMS) oxidation processes were evaluated and compared for aqueous phenol degradation. The effect of initial oxidant concentration on PS/UV-C, H₂O₂/UV-C and PMS/UV-C treatment efficiencies was examined on the basis of phenol and total organic carbon (TOC) removals. Complete phenol degradation could be achieved under all examined reaction conditions with apparent phenol degradation rate constants varying between 0.069 ± 0.002 - 0.382 ± 0.003 min^-1 accompanied with complete TOC removals (≥97%) under optimized PS (20 mM), H₂O₂ (30 mM) and PMS (20 mM) concentrations. Hydroquinone, catechol and benzoquinone were quantified during H₂O₂/UV-C and PMS/UV-C treatment of phenol verifying a HO-dominated oxidation pathway. During PS/UV-C oxidation, the identification of benzoquinone and 3-phenoxyphenol verified the hydroxycyclohexadienyl radical and phenoxyl radical pathways in SO₄^- mediated phenol oxidation.

Original language	English
Pages (from-to)	10-16
Number of pages	7
Journal	Chemical Engineering Journal
Volume	224
Issue number	1
DOIs	https://doi.org/10.1016/j.cej.2012.11.007
Publication status	Published - 2013

Keywords

Hydroxyl radical
Oxidation intermediates
Phenol
Photochemical oxidation
Sulfate radical

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10.1016/j.cej.2012.11.007

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title = "Comparison of sulfate and hydroxyl radical based advanced oxidation of phenol",

abstract = "UV-C photo-assisted persulfate (PS), hydrogen peroxide (H2O2) and peroxymonosulfate (PMS) oxidation processes were evaluated and compared for aqueous phenol degradation. The effect of initial oxidant concentration on PS/UV-C, H2O2/UV-C and PMS/UV-C treatment efficiencies was examined on the basis of phenol and total organic carbon (TOC) removals. Complete phenol degradation could be achieved under all examined reaction conditions with apparent phenol degradation rate constants varying between 0.069 ± 0.002 - 0.382 ± 0.003 min-1 accompanied with complete TOC removals (≥97%) under optimized PS (20 mM), H2O2 (30 mM) and PMS (20 mM) concentrations. Hydroquinone, catechol and benzoquinone were quantified during H2O2/UV-C and PMS/UV-C treatment of phenol verifying a HO-dominated oxidation pathway. During PS/UV-C oxidation, the identification of benzoquinone and 3-phenoxyphenol verified the hydroxycyclohexadienyl radical and phenoxyl radical pathways in SO4- mediated phenol oxidation.",

keywords = "Hydroxyl radical, Oxidation intermediates, Phenol, Photochemical oxidation, Sulfate radical",

author = "Tugba Olmez-Hanci and Idil Arslan-Alaton",

year = "2013",

doi = "10.1016/j.cej.2012.11.007",

language = "English",

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T1 - Comparison of sulfate and hydroxyl radical based advanced oxidation of phenol

AU - Olmez-Hanci, Tugba

AU - Arslan-Alaton, Idil

PY - 2013

Y1 - 2013

N2 - UV-C photo-assisted persulfate (PS), hydrogen peroxide (H2O2) and peroxymonosulfate (PMS) oxidation processes were evaluated and compared for aqueous phenol degradation. The effect of initial oxidant concentration on PS/UV-C, H2O2/UV-C and PMS/UV-C treatment efficiencies was examined on the basis of phenol and total organic carbon (TOC) removals. Complete phenol degradation could be achieved under all examined reaction conditions with apparent phenol degradation rate constants varying between 0.069 ± 0.002 - 0.382 ± 0.003 min-1 accompanied with complete TOC removals (≥97%) under optimized PS (20 mM), H2O2 (30 mM) and PMS (20 mM) concentrations. Hydroquinone, catechol and benzoquinone were quantified during H2O2/UV-C and PMS/UV-C treatment of phenol verifying a HO-dominated oxidation pathway. During PS/UV-C oxidation, the identification of benzoquinone and 3-phenoxyphenol verified the hydroxycyclohexadienyl radical and phenoxyl radical pathways in SO4- mediated phenol oxidation.

AB - UV-C photo-assisted persulfate (PS), hydrogen peroxide (H2O2) and peroxymonosulfate (PMS) oxidation processes were evaluated and compared for aqueous phenol degradation. The effect of initial oxidant concentration on PS/UV-C, H2O2/UV-C and PMS/UV-C treatment efficiencies was examined on the basis of phenol and total organic carbon (TOC) removals. Complete phenol degradation could be achieved under all examined reaction conditions with apparent phenol degradation rate constants varying between 0.069 ± 0.002 - 0.382 ± 0.003 min-1 accompanied with complete TOC removals (≥97%) under optimized PS (20 mM), H2O2 (30 mM) and PMS (20 mM) concentrations. Hydroquinone, catechol and benzoquinone were quantified during H2O2/UV-C and PMS/UV-C treatment of phenol verifying a HO-dominated oxidation pathway. During PS/UV-C oxidation, the identification of benzoquinone and 3-phenoxyphenol verified the hydroxycyclohexadienyl radical and phenoxyl radical pathways in SO4- mediated phenol oxidation.

KW - Hydroxyl radical

KW - Oxidation intermediates

KW - Phenol

KW - Photochemical oxidation

KW - Sulfate radical

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DO - 10.1016/j.cej.2012.11.007

M3 - Article

AN - SCOPUS:84882883499

SN - 1385-8947

VL - 224

SP - 10

EP - 16

JO - Chemical Engineering Journal

JF - Chemical Engineering Journal

IS - 1

ER -

Comparison of sulfate and hydroxyl radical based advanced oxidation of phenol

Abstract

Keywords

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