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Palygorskite Separation from Dodecylammonium-Treated Clays

Published online by Cambridge University Press:  02 April 2024

G. Abudelgawad ,
B. E. Viani  and
J. B. Dixon
G. Abudelgawad
Affiliation:
Faculty of Agriculture, Alfateh University, Tripoli, Libya
B. E. Viani*
Affiliation:
Department of Soil and Crop Sciences, Texas A&M University, College Station, Texas 77843
J. B. Dixon
Affiliation:
Department of Soil and Crop Sciences, Texas A&M University, College Station, Texas 77843
*
1Present address: Arco Oil and Gas Company, Exploration & Production Research, P.O. Box 2919, Dallas, Texas 75221.
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Abstract

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Three methods were investigated to separate palygorskite from mixtures of clay minerals in soils and sediments. The methods were based on the hydrophobic properties of a dodecylammonium-smectite complex and used the <0.2-μm fractions of reference palygorskites that contained smectite and sepiolite impurities. Palygorskite was separated from dodecylammonium-clay complexes by: (1) selective dispersion of palygorskite in H2O; (2) selective extraction of palygorskite by a water:decanol phase separation; and (3) selective extraction of palygorskite by a water: nitrobenzene phase separation. Whereas all three methods resulted in palygorskite separation, selective dispersion was the simplest and employed the more desirable reagents. Small amounts of relatively pure palygorskite in the <0.2-μm fractions were concentrated from palygorskite-containing clays from Texas, Saudi Arabia, and Libya as shown by X-ray powder diffraction and transmission electron microscopy data. A sepiolite impurity in the Georgia palygorskite was concentrated with the palygorskite. Hydrolysis of the dodecylammonium-smectite complex was suggested by the decrease in d-spacing of some samples after the extensive washing necessary for dispersion. An appreciable amount of the fibrous mineral was intimately associated with layer silicates and could not be separated.

Keywords

Dodecylammonium smectiteHydrophobic propertiesMineral separationPalygorskiteSepioliteSmectite
Type
Research Article
Information
Clays and Clay Minerals , Volume 33 , Issue 5 , October 1985 , pp. 438 - 442
Copyright
Copyright © 1985, The Clay Minerals Society

References

Abudelgawad, G., Ahlrichs, J. L. and Dixon, J. B., 1986 Palygorskite and sepiolite separated from soil clays by dodecylamine hydrochloride Soil Sci. .Google Scholar
Galan, E. and Ferrero, A., 1982 Palygorskite-sepiolite clays of Lebrija, southern Spain Clays & Clay Minerals 30 191–199.CrossRefGoogle Scholar
Greenland, D. J., 1965 Interaction between clays and organic compounds in soils. Part 1. Mechanisms of interaction between clays and organic compounds Soils and Fertilizer 28 415–425.Google Scholar
Grim, R. E., 1967 Clay Mineralogy 2nd ed. New York McGrawHill.Google Scholar
Grossman, R. B. and Millet, J. L., 1961 Carbonate removal from soils by a modification of the acetate buffered method Soil Sci. Soc. Amer. Proc. 25 325–326.CrossRefGoogle Scholar
Jordan, J. W., 1949 Alteration of the properties of bentonite by reaction with amines Mineral. Mag. 29 598–605.Google Scholar
Jordan, J. W., 1949 Organophilic bentonite I. Swelling in organic liquids J. Phys. Colloid Chem. 53 294–306.CrossRefGoogle Scholar
Lagaly, A., Weiss, A. and Heller, L., 1969 Determination of the layer charge in mica type layer silicates Proc. Int. Clay Conf., Tokyo, 1969 ed. Jerusalem Israel Univ. Press 61–80.Google Scholar
Lagaly, A., Weiss, A. and Bailey, S. W., 1975 The layer charge of smectite layer silicates Proc. Int. Clay Conf., Mexico City, 1975 Illinois Applied Publishing Ltd., Wilmette 157–172.Google Scholar
Mackintosh, E. E., Lewis, D. A. and Greenland, D. J., 1971 Dodecylammonium-mica complexes. I. Factors affecting the exchange reactions Clays & Clay Minerals 19 209–218.CrossRefGoogle Scholar
Mortland, M. M., 1970 Clay-organo complexes and interaction Advan. Agron. 22 75–117.CrossRefGoogle Scholar
Theng, B. K. G., 1974 The Chemistry of Clay-Organic Reaction New York Wiley.Google Scholar
Weiss, A., 1963 Organic derivative of mica-type layer silicates Angew. Chem. 2 134–143.CrossRefGoogle Scholar
Zelazny, L. W., Calhoun, F. G., Dixon, J. B. and Weed, S. B., 1977 Palygorskite, (attapulgite), sepiolite, talc, pyrophyllite, and zeolites Minerals in Soil Environments Wisconsin Soil Science Society of America, Madison 435–470.Google Scholar