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Ion-specific isotopic fractionation of molybdenum during diffusion in aqueous solutions
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Geosciences and Environmental Engineering.ORCID iD: 0000-0003-4505-4590
2007 (English)In: Environmental Science and Technology, ISSN 0013-936X, E-ISSN 1520-5851, Vol. 41, no 5, p. 1596-1600Article in journal (Refereed) Published
Abstract [en]

Experiments modeling diffusion of Mo in aqueous solutions have been performed and, using multicollector ICP-MS, the ratios of the diffusivities of Mo isotopes, D97Mo/D95Mo, in aqueous solutions have been determined. Diffusion of MoO42- ions in solution was concomitant with Mo isotopic fractionation with D97Mo/D95Mo = 0.99988 ± 0.00004 (2σ for n = 3). In contrast, during diffusion of Mo polyanions, such as Mo7O246- and Mo8O264-, no measurable isotope fractionation has been found with D97Mo/D95Mo = 1.00000 ± 0.00002 (2σ for n = 3). These results indicate the need for due consideration to Mo speciation when attempting to interpret the role of diffusive fluxes in the formation of Mo isotopic signatures in nature. They also raise the possibility that the various chemical forms of other transition metals may be characterized by species-specific isotopic fractionation effects during physicochemical reactions.

Place, publisher, year, edition, pages
2007. Vol. 41, no 5, p. 1596-1600
National Category
Geochemistry
Research subject
Applied Geology
Identifiers
URN: urn:nbn:se:ltu:diva-4846DOI: 10.1021/es062000qISI: 000244467500024Scopus ID: 2-s2.0-33847669208Local ID: 2d7985a0-d31e-11db-b6e3-000ea68e967bOAI: oai:DiVA.org:ltu-4846DiVA, id: diva2:977720
Note
Validerad; 2007; 20070125 (ysko)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved

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Malinovskiy, DmitryBaxter, DouglasRodushkin, Ilia

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