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Efficiences of As uptake from aqueous solution by a natural vivianite material at 4ºC

Published online by Cambridge University Press:  05 July 2018

K. A. Hudson-Edwards ,
S. Houghton  and
K. G. Taylor
K. A. Hudson-Edwards*
Affiliation:
Research School of Earth Sciences at UCL-Birkbeck, University of London, Malet St., London WC1E 7HX, UK
S. Houghton
Affiliation:
Research School of Earth Sciences at UCL-Birkbeck, University of London, Malet St., London WC1E 7HX, UK
K. G. Taylor
Affiliation:
Department of Environmental and Geographical Sciences, Manchester Metropolitan University, Chester Street, Manchester M1 5GD, UK
*
*E-mail: k.hudson-edwards@bbk.ac.uk
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Abstract

Several field and laboratory studies have demonstrated that secondary Fe-bearing minerals such as goethite, lepidocrocite and mackinawite have a high capacity for the uptake of As, but little work has been carried out to examine the capacity of the mineral vivianite [Fe3(PO4)2·8H2O] for this element. We report here preliminary results of an experimental study designed to test the efficiency of As(III) and As(V) uptake by natural vivianite at acid, near-neutral and alkaline pH at T = 4ºC, which is representative of Lake Baikal-type environments, where natural vivianite is reported to occur. The vivianite takes up between 0 and 5% As(III), and between 21 and 45% As(V), from 200 ppb solutions of these As species. Further work at 25ºC and other solution concentrations, together with characterization of the post-sorption solids, will yield information on the efficiencies and mechanisms of As uptake by natural vivianite.

Information

Type
Research Article
Information
Mineralogical Magazine , Volume 72 , Issue 1 , February 2008 , pp. 429 - 431
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 2008

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