Identifying the reactive sites of hydrogen peroxide decomposition and hydroxyl radical formation on chrysotile asbestos surfaces

Martin Walter; Walter D. C. Schenkeveld; Gerald Geroldinger; Lars Gille; Michael Reissner; Stephan M. Kraemer

doi:10.1186/s12989-019-0333-1

Identifying the reactive sites of hydrogen peroxide decomposition and hydroxyl radical formation on chrysotile asbestos surfaces

Martin Walter, Walter D. C. Schenkeveld, Gerald Geroldinger, Lars Gille, Michael Reissner, Stephan M. Kraemer

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

Abstract

Fibrous chrysotile has been the most commonly applied asbestos mineral in a range of technical applications. However, it is toxic and carcinogenic upon inhalation. The chemical reactivity of chrysotile fiber surfaces contributes to its adverse health effects by catalyzing the formation of highly reactive hydroxyl radicals (HO•) from H2O2. In this Haber-Weiss cycle, Fe on the fiber surface acts as a catalyst: Fe3+ decomposes H2O2 to reductants that reduce surface Fe3+ to Fe2+, which is back-oxidized by H2O2 (Fenton-oxidation) to yield HO•. Chrysotile contains three structural Fe species: ferrous and ferric octahedral Fe and ferric tetrahedral Fe (Fe3+tet). Also, external Fe may adsorb or precipitate onto fiber surfaces. The goal of this study was to identify the Fe species on chrysotile surfaces that catalyze H2O2 decomposition and HO• generation.

Original language	English
Article number	3
Number of pages	15
Journal	Particle and Fibre Toxicology
Volume	17
Issue number	1
DOIs	https://doi.org/10.1186/s12989-019-0333-1
Publication status	Published - 2020

Keywords

Asbestos
Chrysotile
Haber-Weiss
Hydroxyl radical
Fenton
Tetrahedral iron
Mossbauer
EPR

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10.1186/s12989-019-0333-1

Identifying the reactive sites of hydrogen peroxide decompositionFinal published version, 1.51 MB

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title = "Identifying the reactive sites of hydrogen peroxide decomposition and hydroxyl radical formation on chrysotile asbestos surfaces",

abstract = "Fibrous chrysotile has been the most commonly applied asbestos mineral in a range of technical applications. However, it is toxic and carcinogenic upon inhalation. The chemical reactivity of chrysotile fiber surfaces contributes to its adverse health effects by catalyzing the formation of highly reactive hydroxyl radicals (HO•) from H2O2. In this Haber-Weiss cycle, Fe on the fiber surface acts as a catalyst: Fe3+ decomposes H2O2 to reductants that reduce surface Fe3+ to Fe2+, which is back-oxidized by H2O2 (Fenton-oxidation) to yield HO•. Chrysotile contains three structural Fe species: ferrous and ferric octahedral Fe and ferric tetrahedral Fe (Fe3+tet). Also, external Fe may adsorb or precipitate onto fiber surfaces. The goal of this study was to identify the Fe species on chrysotile surfaces that catalyze H2O2 decomposition and HO• generation.",

keywords = "Asbestos, Chrysotile, Haber-Weiss, Hydroxyl radical, Fenton, Tetrahedral iron, Mossbauer, EPR",

author = "Martin Walter and Schenkeveld, {Walter D. C.} and Gerald Geroldinger and Lars Gille and Michael Reissner and Kraemer, {Stephan M.}",

year = "2020",

doi = "10.1186/s12989-019-0333-1",

language = "English",

volume = "17",

journal = "Particle and Fibre Toxicology",

issn = "1743-8977",

publisher = "BioMed Central",

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T1 - Identifying the reactive sites of hydrogen peroxide decomposition and hydroxyl radical formation on chrysotile asbestos surfaces

AU - Walter, Martin

AU - Schenkeveld, Walter D. C.

AU - Geroldinger, Gerald

AU - Gille, Lars

AU - Reissner, Michael

AU - Kraemer, Stephan M.

PY - 2020

Y1 - 2020

N2 - Fibrous chrysotile has been the most commonly applied asbestos mineral in a range of technical applications. However, it is toxic and carcinogenic upon inhalation. The chemical reactivity of chrysotile fiber surfaces contributes to its adverse health effects by catalyzing the formation of highly reactive hydroxyl radicals (HO•) from H2O2. In this Haber-Weiss cycle, Fe on the fiber surface acts as a catalyst: Fe3+ decomposes H2O2 to reductants that reduce surface Fe3+ to Fe2+, which is back-oxidized by H2O2 (Fenton-oxidation) to yield HO•. Chrysotile contains three structural Fe species: ferrous and ferric octahedral Fe and ferric tetrahedral Fe (Fe3+tet). Also, external Fe may adsorb or precipitate onto fiber surfaces. The goal of this study was to identify the Fe species on chrysotile surfaces that catalyze H2O2 decomposition and HO• generation.

AB - Fibrous chrysotile has been the most commonly applied asbestos mineral in a range of technical applications. However, it is toxic and carcinogenic upon inhalation. The chemical reactivity of chrysotile fiber surfaces contributes to its adverse health effects by catalyzing the formation of highly reactive hydroxyl radicals (HO•) from H2O2. In this Haber-Weiss cycle, Fe on the fiber surface acts as a catalyst: Fe3+ decomposes H2O2 to reductants that reduce surface Fe3+ to Fe2+, which is back-oxidized by H2O2 (Fenton-oxidation) to yield HO•. Chrysotile contains three structural Fe species: ferrous and ferric octahedral Fe and ferric tetrahedral Fe (Fe3+tet). Also, external Fe may adsorb or precipitate onto fiber surfaces. The goal of this study was to identify the Fe species on chrysotile surfaces that catalyze H2O2 decomposition and HO• generation.

KW - Asbestos

KW - Chrysotile

KW - Haber-Weiss

KW - Hydroxyl radical

KW - Fenton

KW - Tetrahedral iron

KW - Mossbauer

KW - EPR

U2 - 10.1186/s12989-019-0333-1

DO - 10.1186/s12989-019-0333-1

M3 - Article

SN - 1743-8977

VL - 17

JO - Particle and Fibre Toxicology

JF - Particle and Fibre Toxicology

IS - 1

M1 - 3

ER -

Identifying the reactive sites of hydrogen peroxide decomposition and hydroxyl radical formation on chrysotile asbestos surfaces

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Keywords

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