Arsenic Distribution and Speciation in Antigorite-Rich Rocks from Vermont, USA
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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2011
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ndltd-uottawa.ca-oai-ruor.uottawa.ca-10393-202042018-01-05T19:01:03Z Arsenic Distribution and Speciation in Antigorite-Rich Rocks from Vermont, USA Niu, Lijie Hattori, Keiko Arsenic X-ray absorption near-edge structure XRD Extended X-ray absorption fine structure electron microprobe acid leaching diffusion pH 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. 2011-09-07T20:34:15Z 2011-09-07T20:34:15Z 2011 2011 Thesis http://hdl.handle.net/10393/20204 http://dx.doi.org/10.20381/ruor-4800 en Université d'Ottawa / University of Ottawa |
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language |
en |
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NDLTD |
topic |
Arsenic X-ray absorption near-edge structure XRD Extended X-ray absorption fine structure electron microprobe acid leaching diffusion pH |
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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. |
author2 |
Hattori, Keiko |
author_facet |
Hattori, Keiko Niu, Lijie |
author |
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 |
publisher |
Université d'Ottawa / University of Ottawa |
publishDate |
2011 |
url |
http://hdl.handle.net/10393/20204 http://dx.doi.org/10.20381/ruor-4800 |
work_keys_str_mv |
AT niulijie arsenicdistributionandspeciationinantigoriterichrocksfromvermontusa |
_version_ |
1718597363485900800 |