Modification of Hg complexes in layered silicates with temperature: An in situ XAS study

  • Malferrari D
  • Brigatti M
  • Marcelli A
 et al. 
  • 4

    Readers

    Mendeley users who have this article in their library.
  • 6

    Citations

    Citations of this article.

Abstract

This work will address the thermal evolution (variation in oxidation state, disproportionation reactions) of Hg(II), adsorbed by two different layer silicates (montmorillonite and vermiculite) via XAS spectroscopy at increasing temperature. From the XANES analysis we could recognize significant structural differences between Hg-treated montmorillonite and vermiculite even at room temperature. At increasing temperature Hg is not easily removed from the silicate layer and it could be identified in layer structure up to T = 400 °C in montmorillonite and up to T = 700 °C in vermiculite. Furthermore, it is evident from EXAFS spectra collected at room temperature that Hg-H2O complexes are present in both montmorillonite and vermiculite, whereas the HgO form appears only in vermiculite. © 2007 Elsevier Inc. All rights reserved.

Author-supplied keywords

  • Hg
  • Montmorillonite
  • Thermal behavior
  • Vermiculite
  • XAS

Get free article suggestions today

Mendeley saves you time finding and organizing research

Sign up here
Already have an account ?Sign in

Find this document

Authors

  • Daniele Malferrari

  • Maria Franca Brigatti

  • Augusto Marcelli

  • Wangsheng Chu

  • Ziyu Wu

Cite this document

Choose a citation style from the tabs below

Save time finding and organizing research with Mendeley

Sign up for free