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Reduction of crystalline iron(III) oxyhydroxides using hydroquinone: Influence of phase and particle size

Iron oxides and oxyhydroxides are common and important materials in the environment, and they strongly impact the biogeochemical cycle of iron and other species at the Earth's surface. These materials commonly occur as nanoparticles in the 3–10 nm size range. This paper presents quantitative re...

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Detalles Bibliográficos
Autores principales: Anschutz, Amy J, Penn, R Lee
Formato: Texto
Lenguaje:English
Publicado: BioMed Central 2005
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1475791/
https://www.ncbi.nlm.nih.gov/pubmed/35412767
http://dx.doi.org/10.1186/1467-4866-6-60
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author Anschutz, Amy J
Penn, R Lee
author_facet Anschutz, Amy J
Penn, R Lee
author_sort Anschutz, Amy J
collection PubMed
description Iron oxides and oxyhydroxides are common and important materials in the environment, and they strongly impact the biogeochemical cycle of iron and other species at the Earth's surface. These materials commonly occur as nanoparticles in the 3–10 nm size range. This paper presents quantitative results demonstrating that iron oxide reactivity is particle size dependent. The rate and extent of the reductive dissolution of iron oxyhydroxide nanoparticles by hydroquinone in batch experiments were measured as a function of particle identity, particle loading, and hydroquinone concentration. Rates were normalized to surface areas determined by both transmission electron microscopy and Braunauer-Emmett-Teller surface. Results show that surface-area-normalized rates of reductive dissolution are fastest (by as much as 100 times) in experiments using six-line ferrihydrite versus goethite. Furthermore, the surface-area-normalized rates for 4 nm ferrihydrite nanoparticles are up to 20 times faster than the rates for 6 nm ferrihydrite nanoparticles, and the surface-area-normalized rates for 5 × 64 nm goethite nanoparticles are up to two times faster than the rates for 22 × 367 nm goethite nanoparticles.
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spelling pubmed-14757912006-06-10 Reduction of crystalline iron(III) oxyhydroxides using hydroquinone: Influence of phase and particle size Anschutz, Amy J Penn, R Lee Geochem Trans Research Article Iron oxides and oxyhydroxides are common and important materials in the environment, and they strongly impact the biogeochemical cycle of iron and other species at the Earth's surface. These materials commonly occur as nanoparticles in the 3–10 nm size range. This paper presents quantitative results demonstrating that iron oxide reactivity is particle size dependent. The rate and extent of the reductive dissolution of iron oxyhydroxide nanoparticles by hydroquinone in batch experiments were measured as a function of particle identity, particle loading, and hydroquinone concentration. Rates were normalized to surface areas determined by both transmission electron microscopy and Braunauer-Emmett-Teller surface. Results show that surface-area-normalized rates of reductive dissolution are fastest (by as much as 100 times) in experiments using six-line ferrihydrite versus goethite. Furthermore, the surface-area-normalized rates for 4 nm ferrihydrite nanoparticles are up to 20 times faster than the rates for 6 nm ferrihydrite nanoparticles, and the surface-area-normalized rates for 5 × 64 nm goethite nanoparticles are up to two times faster than the rates for 22 × 367 nm goethite nanoparticles. BioMed Central 2005-09-09 /pmc/articles/PMC1475791/ /pubmed/35412767 http://dx.doi.org/10.1186/1467-4866-6-60 Text en Copyright © 2005 American Institute of Physics
spellingShingle Research Article
Anschutz, Amy J
Penn, R Lee
Reduction of crystalline iron(III) oxyhydroxides using hydroquinone: Influence of phase and particle size
title Reduction of crystalline iron(III) oxyhydroxides using hydroquinone: Influence of phase and particle size
title_full Reduction of crystalline iron(III) oxyhydroxides using hydroquinone: Influence of phase and particle size
title_fullStr Reduction of crystalline iron(III) oxyhydroxides using hydroquinone: Influence of phase and particle size
title_full_unstemmed Reduction of crystalline iron(III) oxyhydroxides using hydroquinone: Influence of phase and particle size
title_short Reduction of crystalline iron(III) oxyhydroxides using hydroquinone: Influence of phase and particle size
title_sort reduction of crystalline iron(iii) oxyhydroxides using hydroquinone: influence of phase and particle size
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1475791/
https://www.ncbi.nlm.nih.gov/pubmed/35412767
http://dx.doi.org/10.1186/1467-4866-6-60
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