Nitrotoluene destruction by UV-catalyzed Fenton oxidation

Z. M. Li; P. J. Shea; S. D. Comfort

doi:10.1016/S0045-6535(97)10073-X

Nitrotoluene destruction by UV-catalyzed Fenton oxidation

Z. M. Li, P. J. Shea, S. D. Comfort

School of Natural Resources

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

93 Scopus citations

Abstract

The capacity of UV-catalyzed Fenton oxidation to destroy mono-, di- and trinitrotoluenes (MNT, DNT, TNT) in aqueous solution was evaluated. Mononitrotoluenes were rapidly destroyed by Fenton oxidation in the dark at pH 3.0 or by UV/Fenton oxidation without pH adjustment. UV/Fenton oxidation at pH 3.0 was most effective for DNT and TNT destruction. The number and position of nitro substitutions influenced oxidation rate: 2-nitrotoluene > 4-nitrotoluene > 2,4-dinitrotoluene > 2,6-dinitrotoluene > 2,4,6-trinitrotoluene. UV/Fenton oxidation mineralized more than 95% of the TNT in aqueous extracts of contaminated soil. While dissolved humic and fulvic acids differentially influenced destruction rate, total TNT destroyed after 4 h was not greatly affected. Our results demonstrated that UV-catalyzed Fenton oxidation effectively destroyed nitrotoluenes in water and aqueous extracts of contaminated soil.

Original language	English (US)
Pages (from-to)	1849-1865
Number of pages	17
Journal	Chemosphere
Volume	36
Issue number	8
DOIs	https://doi.org/10.1016/S0045-6535(97)10073-X
State	Published - Apr 1998

Keywords

Dissolved organic matter
Fenton oxidation
Nitrotoluene
Remediation
Ultraviolet light

ASJC Scopus subject areas

Environmental Engineering
Environmental Chemistry
General Chemistry
Pollution
Health, Toxicology and Mutagenesis

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10.1016/S0045-6535(97)10073-X

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@article{c27ba34b265440d1a45781b2c3e51031,

title = "Nitrotoluene destruction by UV-catalyzed Fenton oxidation",

abstract = "The capacity of UV-catalyzed Fenton oxidation to destroy mono-, di- and trinitrotoluenes (MNT, DNT, TNT) in aqueous solution was evaluated. Mononitrotoluenes were rapidly destroyed by Fenton oxidation in the dark at pH 3.0 or by UV/Fenton oxidation without pH adjustment. UV/Fenton oxidation at pH 3.0 was most effective for DNT and TNT destruction. The number and position of nitro substitutions influenced oxidation rate: 2-nitrotoluene > 4-nitrotoluene > 2,4-dinitrotoluene > 2,6-dinitrotoluene > 2,4,6-trinitrotoluene. UV/Fenton oxidation mineralized more than 95% of the TNT in aqueous extracts of contaminated soil. While dissolved humic and fulvic acids differentially influenced destruction rate, total TNT destroyed after 4 h was not greatly affected. Our results demonstrated that UV-catalyzed Fenton oxidation effectively destroyed nitrotoluenes in water and aqueous extracts of contaminated soil.",

keywords = "Dissolved organic matter, Fenton oxidation, Nitrotoluene, Remediation, Ultraviolet light",

author = "Li, {Z. M.} and Shea, {P. J.} and Comfort, {S. D.}",

note = "Funding Information: TNT was efficiently destroyed in aqueous extracts of contaminated soil by Fenton oxidation and W irradiation greatly increased the rate of destruction. Over 95% of TNT in the soil aqueous extract was mineralized by W/Fenton oxidation, compared to 45% by the dark-Fenton treatment. Overall TNT destruction was not greatly influenced by dissolved humic and fi~lvic acid. These results indicate that W-mediated free radical oxidation, particularly W/Fenton oxidation, is a highly effective treatment for destroying nitrotoluenes in aqueous solutions and soil extracts, ACKNOWLEDGEMENTS We thank Dr. C. Kingsbury of the Department of Chemistry for performing the PM3 charge density calculations and assistance interpreting experimental results. Appreciation is expressed to NSF/EPSCoR (coop. agreement EPS-9255225) and the University ofNebraska Water Center for support of this research. Publication no. 11825, Agric. Res. Div., Univ. of Nebraska-Lincoln; project nos. NEB 12-230,239, and 25 1.",

year = "1998",

month = apr,

doi = "10.1016/S0045-6535(97)10073-X",

language = "English (US)",

volume = "36",

pages = "1849--1865",

journal = "Chemosphere",

issn = "0045-6535",

publisher = "Elsevier Ltd",

number = "8",

}

TY - JOUR

T1 - Nitrotoluene destruction by UV-catalyzed Fenton oxidation

AU - Li, Z. M.

AU - Shea, P. J.

AU - Comfort, S. D.

N1 - Funding Information: TNT was efficiently destroyed in aqueous extracts of contaminated soil by Fenton oxidation and W irradiation greatly increased the rate of destruction. Over 95% of TNT in the soil aqueous extract was mineralized by W/Fenton oxidation, compared to 45% by the dark-Fenton treatment. Overall TNT destruction was not greatly influenced by dissolved humic and fi~lvic acid. These results indicate that W-mediated free radical oxidation, particularly W/Fenton oxidation, is a highly effective treatment for destroying nitrotoluenes in aqueous solutions and soil extracts, ACKNOWLEDGEMENTS We thank Dr. C. Kingsbury of the Department of Chemistry for performing the PM3 charge density calculations and assistance interpreting experimental results. Appreciation is expressed to NSF/EPSCoR (coop. agreement EPS-9255225) and the University ofNebraska Water Center for support of this research. Publication no. 11825, Agric. Res. Div., Univ. of Nebraska-Lincoln; project nos. NEB 12-230,239, and 25 1.

PY - 1998/4

Y1 - 1998/4

N2 - The capacity of UV-catalyzed Fenton oxidation to destroy mono-, di- and trinitrotoluenes (MNT, DNT, TNT) in aqueous solution was evaluated. Mononitrotoluenes were rapidly destroyed by Fenton oxidation in the dark at pH 3.0 or by UV/Fenton oxidation without pH adjustment. UV/Fenton oxidation at pH 3.0 was most effective for DNT and TNT destruction. The number and position of nitro substitutions influenced oxidation rate: 2-nitrotoluene > 4-nitrotoluene > 2,4-dinitrotoluene > 2,6-dinitrotoluene > 2,4,6-trinitrotoluene. UV/Fenton oxidation mineralized more than 95% of the TNT in aqueous extracts of contaminated soil. While dissolved humic and fulvic acids differentially influenced destruction rate, total TNT destroyed after 4 h was not greatly affected. Our results demonstrated that UV-catalyzed Fenton oxidation effectively destroyed nitrotoluenes in water and aqueous extracts of contaminated soil.

AB - The capacity of UV-catalyzed Fenton oxidation to destroy mono-, di- and trinitrotoluenes (MNT, DNT, TNT) in aqueous solution was evaluated. Mononitrotoluenes were rapidly destroyed by Fenton oxidation in the dark at pH 3.0 or by UV/Fenton oxidation without pH adjustment. UV/Fenton oxidation at pH 3.0 was most effective for DNT and TNT destruction. The number and position of nitro substitutions influenced oxidation rate: 2-nitrotoluene > 4-nitrotoluene > 2,4-dinitrotoluene > 2,6-dinitrotoluene > 2,4,6-trinitrotoluene. UV/Fenton oxidation mineralized more than 95% of the TNT in aqueous extracts of contaminated soil. While dissolved humic and fulvic acids differentially influenced destruction rate, total TNT destroyed after 4 h was not greatly affected. Our results demonstrated that UV-catalyzed Fenton oxidation effectively destroyed nitrotoluenes in water and aqueous extracts of contaminated soil.

KW - Dissolved organic matter

KW - Fenton oxidation

KW - Nitrotoluene

KW - Remediation

KW - Ultraviolet light

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U2 - 10.1016/S0045-6535(97)10073-X

DO - 10.1016/S0045-6535(97)10073-X

M3 - Article

AN - SCOPUS:0032053367

SN - 0045-6535

VL - 36

SP - 1849

EP - 1865

JO - Chemosphere

JF - Chemosphere

IS - 8

ER -

Nitrotoluene destruction by UV-catalyzed Fenton oxidation

Abstract

Keywords

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