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Type: Artigo de periódico
Title: Cation Exchange Dynamics Confined In A Synthetic Clay Mineral
Author: Grassi G.
Michels L.
Rozynek Z.
Altoe M.A.S.
dos Santos E.C.
da Fonseca C.L.S.
Droppa R.
Gholamipour-Shirazi A.
Fossum J.O.
da Silva G.J.
Abstract: In this work we report X-Ray Diffraction (XRD) and Energy Dispersive X-Ray Spectroscopy (EDS) measurements to investigate the confined cation exchange process in saline aqueous suspensions of a synthetic clay mineral from Lithium-Fluorohectorite to Nickel-Fluorohectorite, as well as the reverse process from Nickel-Fluorohectorite to Lithium-Fluorohectorite and also from Lithium-Fluorohectorite to Sodium-Fluorohectorite. The dynamics of these cation exchanges was followed and it was observed that these processes can be faster than 1 minute. The results are compared to the observations on samples prepared by cation exchange procedures for which the exchange process was performed on the time-scale of months.
Editor: Springer Verlag
Rights: fechado
Identifier DOI: 10.1140/epjst/e2014-02233-8
Date Issue: 2014
Appears in Collections:Unicamp - Artigos e Outros Documentos

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