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Paper Information

Journal:   AMIRKABIR   FALL 2007- WINTER 2008 , Volume 18 , Number 67-C; Page(s) 1 To 8.
 
Paper: 

AN EXPERIMENTAL INVESTIGATION OF ORGANIC CLAY COMPLEXES (ANALYSIS AND FORMULATION)

 
 
Author(s):  ESLAM KISH T.*
 
* 
 
Abstract: 

This experimental research work was aimed at investigating the possibilities of bulging organic clay compounds in heterogenic suspension system of clay minerals and in the presence of natural substances. Moreover, the role of clay mineral in forming clay complexes was investigated to find a way of describing the formation of a clay mineral humic acid system.
In the conducted experimental work, acids and humic acid precursors were extracted from soil samples and these extracts were allowed to react with different clay minerals. Various experimental approacpes (e.g. IR spectroscopy, Conductivity, X-ray Diffraction, Ultra sound technique, Cation- Exchange capacity) were employed to demonstrate the formation of stable clay/organic complexes. The experimental findings show that the formation of these complexes occurs under the catalytic influence of the organic substances. Based on experimental result the formation of clay organic compounds under mild conditions can be described two consecutive stages. First, the humic acid precursors are fixed between layers of clay.
Then, other humic substances are attached to the fixed humic substances by intermolecular forces at the edges of clay mineral particles. Accordingly, a model is proposed to describe the conditions of natural soils and different phases of clay organic compounds formation.

 
Keyword(s): ORGANIC CLAY, HUMIC ACID SYSTEM, HUMIC ACID PRECURSORS, CLAY COMPOUNDS
 
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