Efficiences of As uptake from aqueous solution by a natural vivianite material at 4 degrees C
Hudson-Edwards, Karen A. and Houghton, S.L. and Taylor, K.G. (2008) Efficiences of As uptake from aqueous solution by a natural vivianite material at 4 degrees C. Mineralogical Magazine 72 (1), pp. 429-431. ISSN 0026-461X.
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 = 4°C, 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 25°C 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.
|School:||Birkbeck Schools and Departments > School of Science > Earth and Planetary Sciences|
|Date Deposited:||09 Feb 2011 09:56|
|Last Modified:||17 Apr 2013 12:18|
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