THE CATION EXCHANGE CAPACITY OF INDUSTRIAL MINERALS AND ROCKS OF MILOS ISLAND

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Published: Jan 1, 2007
DOI: https://doi.org/10.12681/bgsg.16718
Keywords:
bentonite kaolin perlite pumice CEC
N. Kantiranis
Aristotle University of Thessaloniki, Faculty of Science, Department of Geology
A. Filippidis
Aristotle University of Thessaloniki, Faculty of Science, Department of Geology
S. Vouta
Aristotle University of Thessaloniki, Faculty of Science, Department of Geology
A. Drakoulis
Aristotle University of Thessaloniki, Faculty of Science, Department of Geology
Th. Koutles
S&B Industrial Minerals S.A
E. Tzamos
Aristotle University of Thessaloniki, Faculty of Science, Department of Geology
Abstract

Four samples of bentonite, two of perlite, a kaolin and a pumice sample from five mines of Milos Island, have been investigated for their Cation Exchange Capacity (CEC) and the mineralogical composition (wt.%), by using the Ammonium Acetate Saturation (AMAS) method and X-Ray Powder Diffraction (XRPD) method, respectively. The bentonite samples contain 68-100 wt.% clay minerals and show CEC values of 35-121 meq/100g, while the kaolin sample contain 41 wt.% clay minerals and show CEC value of 28 meq/100g. The amorphous materials are the main constituent of the perlite samples (73-77 wt.%) and pumice sample (88 wt.%). The CEC values ofperlites were 3-4 meq/100g, while the pumice sample showed a CEC value of 73 meq/100g. The CEC of the samples showed positive correlations with the total content of microporous minerals (clay minerals+micas) as well as with the microporous minerals+amorphous content, mainly affected by the clay minerals content.

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  • Mineralogy-Petrology-Geochemistry-Economic Geology
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