Influence of Peat on Fenton Oxidation

Scott G. Huling; Robert G. Arnold; Raymond A. Sierka; Matthew R. Miller

doi:10.1016/S0043-1354(00)00443-7

Influence of Peat on Fenton Oxidation

Scott G. Huling, Robert G. Arnold, Raymond A. Sierka, Matthew R. Miller

Chemical and Environmental Engineering

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

50 Scopus citations

Abstract

A diagnostic probe was used to estimate the activity of Fenton-derived hydroxyl radicals (·OH), reaction kinetics, and oxidation efficiency in batch suspensions comprised of silica sand, crushed goethite (α-FeOOH) ore, peat, and H₂O₂ (0.13mM). A simple method of kinetic analysis is presented and used to estimate the rate of ·OH production (P_OH) and scavenging term (k_S), which were used to establish the influence of organic matter (Pahokee peat) in Fenton systems. P_OH was greater in the peat-amended systems than in the unamended control, and k_S was approximately the same. Any increase in scavenging of ·OH that resulted from the addition of peat was insignificant in comparison to radical scavenging by reaction with H₂O₂. Also, treatment efficiency, defined as the ratio of probe conversion to H₂O₂ consumption over the same period was greater in the peat-amended system. Results suggest that ·OH production is enhanced in the presence of peat by one or more peat-dependent mechanisms. Fe concentration and availability in the peat, reduction of Fe(III) to Fe(II) by the organic matter, and reduction of organic-complexed Fe(III) to Fe(II) are discussed in the context of the Fenton mechanism.

Original language	English (US)
Pages (from-to)	1687-1694
Number of pages	8
Journal	Water research
Volume	35
Issue number	7
DOIs	https://doi.org/10.1016/S0043-1354(00)00443-7
State	Published - 2001

Keywords

4POBN
Fenton oxidation
Goethite
Peat
Scavenging

ASJC Scopus subject areas

Ecological Modeling
Water Science and Technology
Waste Management and Disposal
Pollution

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10.1016/S0043-1354(00)00443-7

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title = "Influence of Peat on Fenton Oxidation",

abstract = "A diagnostic probe was used to estimate the activity of Fenton-derived hydroxyl radicals (·OH), reaction kinetics, and oxidation efficiency in batch suspensions comprised of silica sand, crushed goethite (α-FeOOH) ore, peat, and H2O2 (0.13mM). A simple method of kinetic analysis is presented and used to estimate the rate of ·OH production (POH) and scavenging term (kS), which were used to establish the influence of organic matter (Pahokee peat) in Fenton systems. POH was greater in the peat-amended systems than in the unamended control, and kS was approximately the same. Any increase in scavenging of ·OH that resulted from the addition of peat was insignificant in comparison to radical scavenging by reaction with H2O2. Also, treatment efficiency, defined as the ratio of probe conversion to H2O2 consumption over the same period was greater in the peat-amended system. Results suggest that ·OH production is enhanced in the presence of peat by one or more peat-dependent mechanisms. Fe concentration and availability in the peat, reduction of Fe(III) to Fe(II) by the organic matter, and reduction of organic-complexed Fe(III) to Fe(II) are discussed in the context of the Fenton mechanism.",

keywords = "4POBN, Fenton oxidation, Goethite, Peat, Scavenging",

author = "Huling, {Scott G.} and Arnold, {Robert G.} and Sierka, {Raymond A.} and Miller, {Matthew R.}",

note = "Funding Information: The U.S. Environmental Protection Agency, through its Office of Research and Development funded and managed the research described here. It has not been subjected to Agency review and therefore does not necessarily reflect the views of the Agency, and no official endorsement should be inferred. ",

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pages = "1687--1694",

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T1 - Influence of Peat on Fenton Oxidation

AU - Huling, Scott G.

AU - Arnold, Robert G.

AU - Sierka, Raymond A.

AU - Miller, Matthew R.

N1 - Funding Information: The U.S. Environmental Protection Agency, through its Office of Research and Development funded and managed the research described here. It has not been subjected to Agency review and therefore does not necessarily reflect the views of the Agency, and no official endorsement should be inferred.

PY - 2001

Y1 - 2001

N2 - A diagnostic probe was used to estimate the activity of Fenton-derived hydroxyl radicals (·OH), reaction kinetics, and oxidation efficiency in batch suspensions comprised of silica sand, crushed goethite (α-FeOOH) ore, peat, and H2O2 (0.13mM). A simple method of kinetic analysis is presented and used to estimate the rate of ·OH production (POH) and scavenging term (kS), which were used to establish the influence of organic matter (Pahokee peat) in Fenton systems. POH was greater in the peat-amended systems than in the unamended control, and kS was approximately the same. Any increase in scavenging of ·OH that resulted from the addition of peat was insignificant in comparison to radical scavenging by reaction with H2O2. Also, treatment efficiency, defined as the ratio of probe conversion to H2O2 consumption over the same period was greater in the peat-amended system. Results suggest that ·OH production is enhanced in the presence of peat by one or more peat-dependent mechanisms. Fe concentration and availability in the peat, reduction of Fe(III) to Fe(II) by the organic matter, and reduction of organic-complexed Fe(III) to Fe(II) are discussed in the context of the Fenton mechanism.

AB - A diagnostic probe was used to estimate the activity of Fenton-derived hydroxyl radicals (·OH), reaction kinetics, and oxidation efficiency in batch suspensions comprised of silica sand, crushed goethite (α-FeOOH) ore, peat, and H2O2 (0.13mM). A simple method of kinetic analysis is presented and used to estimate the rate of ·OH production (POH) and scavenging term (kS), which were used to establish the influence of organic matter (Pahokee peat) in Fenton systems. POH was greater in the peat-amended systems than in the unamended control, and kS was approximately the same. Any increase in scavenging of ·OH that resulted from the addition of peat was insignificant in comparison to radical scavenging by reaction with H2O2. Also, treatment efficiency, defined as the ratio of probe conversion to H2O2 consumption over the same period was greater in the peat-amended system. Results suggest that ·OH production is enhanced in the presence of peat by one or more peat-dependent mechanisms. Fe concentration and availability in the peat, reduction of Fe(III) to Fe(II) by the organic matter, and reduction of organic-complexed Fe(III) to Fe(II) are discussed in the context of the Fenton mechanism.

KW - 4POBN

KW - Fenton oxidation

KW - Goethite

KW - Peat

KW - Scavenging

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Influence of Peat on Fenton Oxidation

Abstract

Keywords

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