INTERCALATION BETWEEN A WELL-CHARACTERIZED ANDISOL FULVIC-ACID AND MONTMORILLONITE

Authors
MIRABELLA A PICCOLO A PIETRAMELLARA G
Citation
A. Mirabella et al., INTERCALATION BETWEEN A WELL-CHARACTERIZED ANDISOL FULVIC-ACID AND MONTMORILLONITE, Fresenius environmental bulletin, 5(7-8), 1996, pp. 430-435
Citations number
14
Categorie Soggetti
Environmental Sciences
Journal title
Fresenius environmental bulletin → ACNP
ISSN journal
10184619
Volume
5
Issue
7-8
Year of publication
1996
Pages
430 - 435
Database
ISI
SICI code
1018-4619(1996)5:7-8<430:IBAWAF>2.0.ZU;2-C
Abstract
The interaction of a well characterized fulvic acid, extracted from an Andisol, with a montmorillonite saturated with Na and Ca at pH 3.5 an d 4.5 was studied. Experimental data showed that the FA can enter the interlayer of smectite at both pH values. Crystallite dimensions varie d with the type of cation and influenced the amount of FA adsorbed. On ly a small proportion of FA was tight to montmorillonite through a wat er bridge, the main type of bonding being constituted by a innersphere complex between the FA acid groups and the saturating cation.