Water Sites at a Clay Interface

✍ Scribed by J. Grandjean

• Publisher: Elsevier Science
• Year: 1997
• Tongue: English
• Weight: 61 KB
• Volume: 185
• Category: Article
• ISSN: 0021-9797
• DOI: 10.1006/jcis.1996.4630

✦ Synopsis

ARTICLE NO. CS964630

NOTE Water Sites at a Clay Interface

To get more information on the behavior of molecules and ions near the clay surface we have used NMR spectroscopy which has been shown useful 2 H NMR quadrupolar splittings of clay suspensions monitor the to describe the structure and dynamics of interfacial species (18). In this orientation of water molecules near the solid surface. Two limiting note, I have extended previous studies on clay suspensions (10-12) to water interfacial sites explain our results on montmorillonite, hectdetermine how the mean orientation of interfacial water molecules is aforite, and saponite suspensions. The location of cation isomorfected by the location of the cation isomorphous substitution. phous substitution and the Ca 2/ /Na / molar ratio of exchangeable cations modulate their relative importance. With beidellite suspen-THEORY sions, water orientation at the clay surface cannot be described within the above scheme. ᭧ 1997 Academic Press

The nuclear spin quantum number I of deuterium is 1. The allowed NMR