Sol formation ability of Ca/Na-montmorillonite at low ionic strength

Autor:	Martin Birgersson, Ola Karnland, Magnus Hedström
Rok vydání:	2011
Předmět:	Inorganic chemistry chemistry.chemical_element Sedimentation Calcium Low ionic strength Ion chemistry.chemical_compound Colloid Geophysics Montmorillonite chemistry Geochemistry and Petrology Bentonite medicine Swelling medicine.symptom
Zdroj:	Physics and Chemistry of the Earth, Parts A/B/C. 36:1572-1579
ISSN:	1474-7065
Popis:	Various colloidal phases of Wyoming type Ca/Na-montmorillonite have been investigated experimentally by sedimentation and swelling tests of originally pure Ca- or Na-montmorillonite in different CaCl2/NaCl solutions of low ionic strength. Forces contributing to colloid (de)stability are discussed, and the experimental findings are compared with a theoretical sol formation zone in the [Ca2+]–[Na+] diagram derived from simple assumptions regarding the forces. It is found that the sol formation ability drastically lowers when calcium ions are present in the system. This effect could be due to an explicit influence of these ions on edge face interactions.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::fb6650ad09674d72b38a4bd17c310b31 https://doi.org/10.1016/j.pce.2011.07.017 Zobrazit plný text záznamu Full Text from ScienceDirect