Arsenic Distribution and Speciation in Antigorite-Rich Rocks from Vermont, USA

Arsenic Distribution and Speciation in Antigorite-Rich Rocks from Vermont, USA

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Summary Serpentinites from the northern Vermont were examined for the distribution and abundance of As. XRD and electron microprobe showed the samples are composed of antigorite, chromite, magnetite, and carbonate minerals (magnesite, dolomite, calcite). The concentration in As when the samples wer...

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Main Author: Niu, Lijie
Language:en
Published: 2011
Subjects:
Arsenic
X-ray absorption near-edge structure
XRD
Extended X-ray absorption fine structure
electron microprobe
acid leaching
diffusion
pH
Online Access:http://hdl.handle.net/10393/20204
id ndltd-LACETR-oai-collectionscanada.gc.ca-OOU-OLD.-20204
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spelling ndltd-LACETR-oai-collectionscanada.gc.ca-OOU-OLD.-202042013-04-05T03:20:44ZArsenic Distribution and Speciation in Antigorite-Rich Rocks from Vermont, USANiu, LijieArsenicX-ray absorption near-edge structureXRDExtended X-ray absorption fine structureelectron microprobeacid leachingdiffusionpHSummary Serpentinites from the northern Vermont were examined for the distribution and abundance of As. XRD and electron microprobe showed the samples are composed of antigorite, chromite, magnetite, and carbonate minerals (magnesite, dolomite, calcite). The concentration in As when the samples were dissolved in H3PO4 was 10% of the concentration in As when the samples were dissolved in concentrated HF/HNO3, suggesting that As is mainly incorporated in the structure of antigorite. X-ray absorption near-edge structure spectra showed that the As is As(III) in the samples. Extended X-ray absorption fine structure spectra suggested that the As has a tetrahedral coordination and is located in the Si-site in serpentine.2011-09-07T20:34:15Z2011-09-07T20:34:15Z20112011-09-07http://hdl.handle.net/10393/20204en
collection NDLTD
language en
sources NDLTD
topic Arsenic
X-ray absorption near-edge structure
XRD
Extended X-ray absorption fine structure
electron microprobe
acid leaching
diffusion
pH
spellingShingle Arsenic
X-ray absorption near-edge structure
XRD
Extended X-ray absorption fine structure
electron microprobe
acid leaching
diffusion
pH
Niu, Lijie
Arsenic Distribution and Speciation in Antigorite-Rich Rocks from Vermont, USA
description Summary Serpentinites from the northern Vermont were examined for the distribution and abundance of As. XRD and electron microprobe showed the samples are composed of antigorite, chromite, magnetite, and carbonate minerals (magnesite, dolomite, calcite). The concentration in As when the samples were dissolved in H3PO4 was 10% of the concentration in As when the samples were dissolved in concentrated HF/HNO3, suggesting that As is mainly incorporated in the structure of antigorite. X-ray absorption near-edge structure spectra showed that the As is As(III) in the samples. Extended X-ray absorption fine structure spectra suggested that the As has a tetrahedral coordination and is located in the Si-site in serpentine.
author Niu, Lijie
author_facet Niu, Lijie
author_sort Niu, Lijie
title Arsenic Distribution and Speciation in Antigorite-Rich Rocks from Vermont, USA
title_short Arsenic Distribution and Speciation in Antigorite-Rich Rocks from Vermont, USA
title_full Arsenic Distribution and Speciation in Antigorite-Rich Rocks from Vermont, USA
title_fullStr Arsenic Distribution and Speciation in Antigorite-Rich Rocks from Vermont, USA
title_full_unstemmed Arsenic Distribution and Speciation in Antigorite-Rich Rocks from Vermont, USA
title_sort arsenic distribution and speciation in antigorite-rich rocks from vermont, usa
publishDate 2011
url http://hdl.handle.net/10393/20204
work_keys_str_mv AT niulijie arsenicdistributionandspeciationinantigoriterichrocksfromvermontusa
_version_ 1716579416825397248

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