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Changes of mineralogical and surface properties of water dispersible clay after acid treatment of soils

Published online by Cambridge University Press:  09 July 2018

G. Józefaciuk ,
Z. Sokołowska ,
S. Sokołowski ,
A. Alekseev  and
T. Alekseeva
G. Józefaciuk
Affiliation:
Institute of Agrophysics, LublinPoland
Z. Sokołowska
Affiliation:
Institute of Agrophysics, LublinPoland
S. Sokołowski
Affiliation:
Computer Laboratory Faculty of Chemistry, Maria Curie-Skłodowska University, LublinPoland
A. Alekseev
Affiliation:
Institute of Soil Science and Photosynthesis, Puschino, Russia
T. Alekseeva
Affiliation:
Institute of Soil Science and Photosynthesis, Puschino, Russia
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Abstract

Mineralogical and water adsorption properties of water dispersible clays extracted from five soils of different typology after treatment with acid to different pH levels, were studied. The mineral composition, total and divalent iron content, surface areas and average adsorption energies of water dispersible clays were complicated functions of pH, reflecting the simultaneous effects of mineral destruction and aggregate disruption processes under influence of protons on soils. The magnetic susceptibilities of water dispersible clays were the lowest at pH 2 and roughly constant at higher pH values indicating the dissolution of crystalline forms of Fe below pH 3. The broadening of the peaks of adsorption energy distribution functions with decrease in pH is related to increasing formation of amorphous material from mineral phases.

Type
Research Article
Information
Clay Minerals , Volume 30 , Issue 2 , June 1995 , pp. 149 - 155
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1995

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