Skip to main content Accessibility help

We use cookies to distinguish you from other users and to provide you with a better experience on our websites. Close this message to accept cookies or find out how to manage your cookie settings.

Close cookie message
×
  1. Home
  2. Search

Refine search

Refine search

Access:
Content type:
Publication date:
Apply   From and To filters
Subject: Show more
Journals Show more
Publishers: Show more
Societies Show more
Series: Show more
Collections: Show more

Actions for selected content:

Select all | Deselect all
  • View selected items
  • Export citations
  • Download PDF (zip)
  • Save to Kindle
  • Save to Dropbox
  • Save to Google Drive

Save Search

You can save your searches here and later view and run them again in "My saved searches".

Please provide a title, maximum of 40 characters.
Cancel
×

1 results

  • Clay Poultices in Salt Extraction from Ornamental Stones: A Statistical Approach

  • Maria Angeles Vicente, Santiago Vicente-Tavera
  • Journal:
    Clays and Clay Minerals / Volume 49 / Issue 3 / June 2001
    Published online by Cambridge University Press:
    28 February 2024, pp. 227-235
    • Article
      • You have access
    • PDF
    • Export citation

  • The extraction of salts by layered (bentonite) and fibrous (sepiolite) clay poultices from stone materials currently used in Heritage buildings was studied. Analyses were performed on stones affected by salts but not submitted to humidity, and also on stones affected by salts and simultaneously submitted to continuous or intermittent humidity during the salt-extraction process. From the experimental results and the statistical analysis, the application of two successive poultices is sufficient for an efficient extraction of Cl− and NO3- in the absence of humidity. However, under humid conditions, the efficiency of the method is reduced considerably. For SO42-, the use of hydrotalcites (anionic clays) is recommended for more effective extraction.