http://www.cnr.it/ontology/cnr/individuo/prodotto/ID222347
Arsenic-bearing calcite in natural travertines: Evidence from sequential extraction, ?XAS, and ?XRF. (Articolo in rivista)
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- Arsenic-bearing calcite in natural travertines: Evidence from sequential extraction, ?XAS, and ?XRF. (Articolo in rivista) (literal)
- Anno
- 2013-01-01T00:00:00+01:00 (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
- 10.1021/es304953a (literal)
- Alternative label
Costagliola P. [1], Bardelli F. [2], Benvenuti M. [1], Di Benedetto F. [1, 3], Lattanzi P. [4], Romanelli M. [1, 3], Paolieri M. [1], Rimondi V. [1], Vaggelli G. [5] (2013)
Arsenic-bearing calcite in natural travertines: Evidence from sequential extraction, ?XAS, and ?XRF.
in Environmental science & technology; ACS, American chemical society, Washington, DC (Stati Uniti d'America)
(literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
- Costagliola P. [1], Bardelli F. [2], Benvenuti M. [1], Di Benedetto F. [1, 3], Lattanzi P. [4], Romanelli M. [1, 3], Paolieri M. [1], Rimondi V. [1], Vaggelli G. [5] (literal)
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- http://pubs.acs.org/journal/esthag (literal)
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- [1] Dipartimento di Scienze della Terra, Universita? di Firenze, Firenze, Italy
[2] Institut des Sciences de la Terre, Universite? Joseph Fourier, Maison des Geosciences, Grenoble, France
[3] INSTM unit of Firenze, Sesto Fiorentino, Italy
[4] Dipartimento di Scienze Chimiche e Geologiche, Universita? di Cagliari, Cagliari, Italy
[5] Istituto di Geoscienze e Georisorse, CNR, Torino, Italy (literal)
- Titolo
- Arsenic-bearing calcite in natural travertines: Evidence from sequential extraction, ?XAS, and ?XRF. (literal)
- Abstract
- Recent studies demonstrated that synthetic calcite may host considerable amounts of arsenic (As). In this paper, the concentration of As in natural calcite was determined using two novel, specifically designed, sequential extraction procedures. In addition, the oxidation state of As and its distribution between calcite and coexisting Fe-oxyhydroxides was unravelled by ?XRF elemental mapping and As K-edge ?XAS spectroscopy. Our results conclusively demonstrate that arsenic can be found in natural calcite up to 2 orders of magnitude over the normal crustal As abundances. Because of the large diffusion of calcite in the environment, this phase may exert an important control on As geochemistry, mobility, and bioavailability. (literal)
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