A preliminary study on physical, mineralogical, chemical and rheological characteristics of Mg-Fe-smectite and palygorskite clays of the Ventzia basin, Grevena (Greece)

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Dimitrios Papadimitriou*, Christina Mytiglaki, Nikolaos Kantiranis

In the present study, some physical properties of palygorskite and Mg-Fe-smectite clays of the Ventzia basin in Grevena (Greece) were determined, such as the apparent bulk density, water and oil absorption, pH and absorption of methylene blue. In addition, the rheological behavior and the filtration capacity of these clays with the addition of polymers were studied. The mineralogical composition was examined by X-ray diffraction, while their chemical composition by X-ray fluorescence spectroscopy. Low apparent bulk density, low absorption in methylene blue solution, high absorption in oil, high performance in salt solution, and high filtration loss, are characteristics of palygorskite. In contrast, high apparent bulk density, high absorption in water and methylene blue solution, and low filtration loss are characteristics of Mg-Fe-smectite. Mg-Fe-smectite suspensions improved their performance using carboxymethyl cellulose (CMC) and causticized lignite in deionized water. The performance of palygorskite suspensions was improved using guar gum, in different aqueous environments. Strong correlations between physical, mineralogical, chemical and rheological characteristics were identified by statistical process.

Keywords:Ventzia basin, smectite, bentonite, palygorskite, rheology, polymers, CMC, guar gum

Proscience vol. 9

Pp 37-44

DOI: 10.14644/EC2023.007