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Exchange Reactions in the Ca-Mg-Na-Montmorillonite System

Published online by Cambridge University Press:  28 February 2024

Giora Rytwo ,
Amos Banin  and
Shlomo Nir
Giora Rytwo
Affiliation:
The Seagram Center for Soil and Water Sciences, The Faculty of Agriculture, The Hebrew University of Jerusalem, Rehovot 76100, Israel MIGAL Galilee Technological Center, Kiryat Shmona, 10200, Israel
Amos Banin
Affiliation:
The Seagram Center for Soil and Water Sciences, The Faculty of Agriculture, The Hebrew University of Jerusalem, Rehovot 76100, Israel
Shlomo Nir
Affiliation:
The Seagram Center for Soil and Water Sciences, The Faculty of Agriculture, The Hebrew University of Jerusalem, Rehovot 76100, Israel
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Abstract

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The exchange reactions of Na, Ca and Mg on montmorillonite are revisited employing recently developed analytical and theoretical approaches. The fractional adsorption of the cations has been determined by displacing them from the adsorbed state in one step, using a low concentration of an organic cation of large binding affinity. The analysis of displaced and solution cations employed inductively coupled plasma emission spectrometry. An adsorption model was employed in the analysis of the data. The procedure consists of solving the electrostatic Gouy-Chapman equations and calculating adsorbed amounts of the cations as the sum of the cations residing in the double layer region, and the cations chemically bound to the surface, in a closed system. The model also accounts explicitly for cation complexation in solution. Thus the calculations also considered the adsorption of CaCl+ and MgCl+, which eliminated the apparent increase of the cation exchange capacity (CEC) with divalent cation concentration. The model could explain and yield predictions for our measured adsorbed amounts as well as previously published data, in the binary and ternary systems of Ca/Mg/Na, provided that the fraction of surface sites occupied by calcium did not exceed 0.4. For a larger coverage of surface sites by calcium, a fit of the experimental data required an order of magnitude increase in the binding coefficients of the divalent cations in the binary system Ca/Na and in the ternary system Ca/Mg/Na.

Keywords

Cation Adsorption ModelCa2+ AdsorptionMg2+ AdsorptionMontmorilloniteSolution Complexes
Type
Research Article
Information
Clays and Clay Minerals , Volume 44 , Issue 2 , April 1996 , pp. 276 - 285
Copyright
Copyright © 1996, The Clay Minerals Society

References

Banin, A.. 1968. Ion exchange isotherms of montmorillonite and structural factors affecting them. Israel J Chem 6: 27–36.CrossRefGoogle Scholar
Banin, A. and Amiel, A.. 1969. A correlative study of the chemical and physical properties of a group of natural soils of Israel. Geoderma 3: 185–198.CrossRefGoogle Scholar
Banin, A. and Lahav, N.. 1968. An optical study of particle size of montmorillonite with various adsorbed ions. Nature 217: 1146–1147.CrossRefGoogle Scholar
Blackmore, H.F. and Miller, R.D.. 1961. Tactoid size and osmotic swelling in Ca-montmorillonite. Soil Sci Soc Am Proc 25: 169–173.CrossRefGoogle Scholar
Bolt, G.H.. 1955. Analysis of the validity of the Gouy-Chapman theory of the electric double layer. J Colloid Sci 10: 206–218.CrossRefGoogle Scholar
Carter, D.L., Heilman, M.D. and Gonzalez, C.L.. 1965. Ethylene glycol monoethyl ether for determining surface area of silicate minerals. Soil Sci 100: 356–360.CrossRefGoogle Scholar
Emerson, W.W. and Bakker, A.C.. 1973. The comparative effects of exchangeable calcium, magnesium and sodium on some physical properties of red-brown earth subsoils. II. The spontaneous dispersion of aggregates in water. Aust J Soil Res 11: 151–157.CrossRefGoogle Scholar
Hirsch, D., Nir, S. and Banin, A.. 1989. Prediction of Cadmium complexation in solution and adsorption to montmorillonite. Soil Sci Soc Am J 53: 716–721.CrossRefGoogle Scholar
Lahav, N. and Banin, A.. 1968. Tactoid rearrangement and the optical density of montmorillonite suspensions during Na-Ca exchange reaction. J Colloid Interface Sci 26: 238–239.CrossRefGoogle Scholar
Levy, R., Tanji, K.K. and Whittig, L.D.. 1983. Effect of precipitation of alkaline earth carbonates and magnesium hydroxide of Na-Ca-Mg exchange in Wyoming bentonite. Soil Sci Soc Am J 47: 906–912.CrossRefGoogle Scholar
Lindsay, W.L.. 1979. Chemical equilibria in soils. New York: Wiley-Interscience Publ.Google Scholar
Maes, A. and Cremers, A.. 1977. Charge density effects in ion exchange. Part 1.—Heterovalent exchange equilibria. J Chem Soc Faraday I 73: 1807–1814.CrossRefGoogle Scholar
Margulies, L., Rozen, H. and Nir, S.. 1988. Model for competitive adsorption of organic cations on clays. Clays & Clay Miner 36: 270–276.CrossRefGoogle Scholar
McLaughlin, S.G.A., Szabo, G. and Eisenman, G.. 1971. Divalent ions and the surface potential of charged phospholipid membranes. J Gen Physiol 58: 667–687.CrossRefGoogle ScholarPubMed
Nir, S., Newton, C. and Papadhadjopoulos, D.. 1978. Binding of cations to phosphatdylserine vesicles. Bioelectrochem Bioenerg 5: 116–133.CrossRefGoogle Scholar
Nir, S.. 1984. A model for cation adsorption in closed systems. Application to calcium binding to phospholipid vesicles. J Colloid Interface Sci 102: 313–321.CrossRefGoogle Scholar
Nir, S.. 1986. Specific and non specific cation adsorption to clays. Solution concentrations and surface potentials. Soil Sci Soc Am J 50: 52–57.CrossRefGoogle Scholar
Nir, S., Hirsch, D., Navrot, J. and Banin, A.. 1986. Specific adsorption of Li, Na, K, Cs, and Sr to montmorillonite. Soil Sci Soc Am J 50: 40–45.CrossRefGoogle Scholar
Rowell, D.L.. 1963. Effect of electrolyte concentration on the swelling of orientated aggregates of montmorillonite. Soil Sci 96: 176–188.CrossRefGoogle Scholar
Rytwo, G., Serban, C., Nir, S. and Margulies, L.. 1991. Use of methylene blue and crystal violet for determination of exchangeable cations in montmorillonite. Clays & Clay Miner 39: 551–555.CrossRefGoogle Scholar
Rytwo, G., Nir, S. and Margulies, L.. 1995. Interactions of monovalent organic cations with montmorillonite, adsorption and model calculations. Soil Sci Soc Am J 59: 554–564.CrossRefGoogle Scholar
Rytwo, G., Nir, S. and Margulies, L.. 1996. Adsorption and interactions of diquat and paraquat with montmorillonite. Soil Sci Soc Am J 60: 601–610.CrossRefGoogle Scholar
Shainberg, I., Oster, J.D. and Wood, J.D.. 1980. Sodium-calcium exchange in montmorillonite and illite suspensions. Soil Sci Soc Am J 44: 960–964.CrossRefGoogle Scholar
Sposito, G.. 1991. Effect of chloride ions on sodium-calcium and sodium-magnesium exchange on montmorillonite. Soil Sci Soc Am J 55: 965–967.CrossRefGoogle Scholar
Sposito, G., Holtzclaw, K.M., Charlet, L., Jouany, C. and Page, A.L.. 1983a. Sodium-calcium and sodium-magnesium exchange on Wyoming bentonite in perchlorate and chloride background ionic media. Soil Sci Soc Am J 47: 51–56.CrossRefGoogle Scholar
Sposito, G., Jouany, C., Holtzclaw, K.M. and LeVesque, C.S.. 1983b. Calcium-magnesium exchange on Wyoming bentonite in the presence of adsorbed sodium. Soil Sci Soc Am J 47: 1081–1085.CrossRefGoogle Scholar
Sposito, G., Holtzclaw, K.M., Jouany, C. and Charlet, L.. 1983c. Cation selectivity in sodium-calcium, sodium-magnesium and calcium-magnesium exchange on Wyoming bentonite at 298°K. Soil Sci Soc Am J 47: 917–921.CrossRefGoogle Scholar
van Olphen, H. and Fripiat, J.J.. 1979. In: Data handbook for clay materials and other non-metallic minerals. Oxford: Pergamon Press, p. 19.Google Scholar
Verwey, R.C. and JThG, Overbeek. 1948. Theory of the stability of lyophobic colloids. New York: Elsevier.Google Scholar