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RHEOLOGICAL PROPERTIES OF PALYGORSKITE-SMECTITE SUSPENSIONS FROM THE VENTZIA BASIN, W. MACEDONIA, GREECE

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G.E Christidis, P. Katsiki, A. Pratikakis, G. Kacandes
G.E Christidis, P. Katsiki, A. Pratikakis, G. Kacandes

Abstract


In this contribution we examine the rheological properties of palygorskite rich clays from the Ventzia Basin, W. Macedonia, Greece. The clays consist of palygorskite and/or dioctahedral Fe-rich smectite (nontronite) and quartz as main components, and serpentine, amphibole and sepiolite as minor constituents. The apparent and plastic viscosity and yield point increase with increasing concentration of clay in the suspension. Flow is Newtonian for 1% suspensions, becoming gradually Bingham plastic (3% clay suspensions) and then pseudoplastic with yield point described by the Herschel Bulckley flow model. In the case of suspensions cf smectite-free clays Bingham plastic flow behaviour was not observed. Addition of 1M NaCl electrolyte deteriorates the rheological behaviour of the smectite-bearing palygorskite clays but it does not affect significantly the smectite-free, palygorskite rich clays. The different rheological properties of the palygorskite compared to smectite is due to the different morphological and crystal-chemical properties of these two minerals. It is suggested that the palygorskite-rich clays can be used successfully as drilling muds in seawater based drilling fluids, in which smectite-based drilling muds tend to flocculate.


Keywords


palygorskite; nontronite; viscosity; yield point; electrolyte; Herschel Bulckley flow; Ventzia Basin; W. Macedonia;

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References


API Specifications 13A 1993. Specification for Drilling Fluid Materials. American Petroleum Institute.

Brandenburg, U. & Lagaly, G. 1988. Rheological properties of sodium motnmorillonite dispersions. Appl.

Clay Sci., 3, 263-279.

XLIII, No 5 – 2568

Christidis, G.E. 1995. Mechanism of illitization of bentonites in the geothermal field of Milos Island,

Greece. Evidence based on mineralogy, chemistry, particle thickness and morphology. Clays Clay

Miner., 43, 567-594.

Christidis, G., Scott, P.W. and Marcopoulos, T. 1995. Origin of the bentonite deposits of Eastern Milos,

Aegean, Greece: Geological, Mineralogical and Geochemical evidence. Clays Clay Miner., 43, 63-

Galan, E. 1996. Properties and applications of palygorskite-sepiolite clays. Clay Miner., 31, 443-453.

Grim, R.E. and Güven, N. 1978. Bentonites. Geology, mineralogy, properties and uses. Elsevier, Amsterdam,

-155.

Heath, D. and Tadros, T.F. 1983. Influence of pH, electrolyte and poly(vinyl alcohol) addition on the rheological

characteristics of aqueous dispersions of sodium montmorillonite. J. Colloid Interf. Sci., 93,

-319.

Hiemenz, P.C. and Rajagopalan, R. 1997. Principles of colloid and surface chemistry, 3rd edition. New

York: Taylor and Francis.

Jones, B.F. and Galan, E. 1988. Sepiolite and palygorskite. In: Bailey S.W. (ed.): Hydrous Phyllosilicates.

Rev. Mineral., 19, MSA 631-674.

Kastritis, I.D., Kacandes, G.H. and Mposkos, E. (2003): The palygorskite and Mg-Fe-smectite clay deposits

of the Ventzia basin, western Macedonia, Greece. In: Eliopoulos, D. et al., (eds): Mineral exploration

and sustainable development, Millpress, Rotterdam, 891-894.

Keren, R. 1988. Rheology of aqueous suspension of sodium/calcium montmorillonite. Soil Sci. Soc. Am.

J., 52, 924-928.

Keren, R. 1989. Effect of clay charge density and adsorbed ions on the rheology of montmorillonite suspension.

Soil Sci. Soc. Am. J., 53, 924-928.

Lagaly, G. 1989. Principles of flow of kaolin and bentonite dispersions. Appl. Clay Sci., 4, 105-123.

Lyckham, P.F. and Rossi, S. 1999. The colloidal and rheological properties of bentonite suspensions. Adv.

Colloid Interface Sci., 82, 43-92.

Moore, D.M. and Reynolds, R.C. Jr. 1997. X-ray diffraction and the identification and analysis of clay

minerals, 2nd edition. Oxford: Oxford University Press.

Murrey, H.H. 2007. Applied Clay Mineralogy/Developments in Clay Science 2/. Elsevier, Amsterdam, 180

pp.

Neaman, A. & Singer A. 2000. Rheological properties of aqueous suspensions of palygorskite. Soil Sci.

Soc. Am. J., 64:427-436.

Neaman, A. & Singer A. 2004. Possible use of the Sacalum (Yucatan) palygorskite as drilling muds. Appl.

Clay Sci., 25, 121-124.

Permien, T. and Lagaly, G. 1995. The rheological and colloidal properties of bentonite dispersions in the

presence of organic compounds. V. Bentonite and sodium montmorillonite and surfactants. Clays

Clay Miner., 43, 229-236.


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