Hostname: page-component-848d4c4894-xm8r8 Total loading time: 0 Render date: 2024-06-23T21:18:17.868Z Has data issue: false hasContentIssue false
  • English
  • Français

Effects of Iron Oxidation State on the Specific Surface Area of Nontronite

Published online by Cambridge University Press:  02 April 2024

Paul R. Lear  and
Joseph W. Stucki
Paul R. Lear*
Affiliation:
Department of Agronomy, University of Illinois, Urbana, Illinois 61801
Joseph W. Stucki
Affiliation:
Department of Agronomy, University of Illinois, Urbana, Illinois 61801
*
1Current address: EPL Bio-Analytical Services, Inc., Decatur, Illinois 62525
Get access Rights & Permissions [Opens in a new window]

Abstract

The effect of Fe oxidation state on the specific surface area, Sm, of nontronite was studied using the <2-µm, Na+-saturated fraction of the SWa-1 and Garfield nontronite reference clays. The reduction of structural Fe3+ in the octahedral sheet of the nontronite decreased Sm as measured by the adsorption of 2-ethoxyethanol (ethylene glycol-monoethyl ether, EGME). The swellability in water of the nontronite also decreased during reduction. The amount of nonexchangeable Na+, on the other hand, increased with increasing Fe2+ content and was highly correlated with EGME adsorption (r = -.985). The relationship between Sm and Fe2+ was attributed to the collapse of partially or fully expanded layers to unexpanded layers.

Keywords

Ethylene glycol-monoethyl etherIronNontroniteOxidationSpecific surface area
Type
Research Article
Information
Clays and Clay Minerals , Volume 37 , Issue 6 , December 1989 , pp. 547 - 552
Copyright
Copyright © 1989, The Clay Minerals Society

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Carter, D. L., Heilman, M. D. and Gonzalez, C. M., 1965 Ethylene glycol monoethyl ether for determining surface area of layer silicate minerals Soil Sci. 100 356 – 360.CrossRefGoogle Scholar
Chen, S. Z., Low, P. F. and Roth, C. B., 1987 Relation between potassium fixation and the oxidation state of octahedral iron Soil Sci. Soc. Amer. J. 51 82 – 86.CrossRefGoogle Scholar
Egashira, K. and Ohtsubo, M., 1983 Swelling and mineralogy of smectites in paddy soils derived from marine alluvium, Japan Geoderma 29 119 – 127.CrossRefGoogle Scholar
Foster, M. D., 1953 Geochemical studies of clay minerals: II. Relation between ionic substitution and swelling in montmorillonites Amer. Mineral. 38 994 – 1006.Google Scholar
Foster, W. R., Savins, J. G., Waite, J. M. and Mulligan, W. O., 1955 Lattice expansion and Theological behavior of relationships in water-montmorillonite systems Clays and Clay Minerals, Proc. 3rd Natl. Conf, Houston, Texas, 1954 296 – 316.CrossRefGoogle Scholar
Goodman, B. A., Russell, J. D., Fraser, A. R. and Woodhams, FWD, 1976 A Mössbauer and LR. spectroscopic study of the structure of nontronite Clays & Clay Minerals 24 53 – 59.CrossRefGoogle Scholar
Lear, P. R. and Stucki, J. W., 1985 Role of structural hydrogen in the reduction of iron in nontronite Clays & Clay Minerals 33 539 – 545.CrossRefGoogle Scholar
Low, P. F., 1980 The swelling of clay: II. Montmorillonites Soil Sci. Soc. Amer. J. 44 667 – 676.CrossRefGoogle Scholar
Low, P.F., 1987 Structural component of the swelling pressure of clays Langmuir 3 18 – 25.CrossRefGoogle Scholar
Low, P. F. and Margheim, J. F., 1979 The swelling of clay. I. Basic concepts and empirical equations Soil Sci. Soc. Amer. J. 43 473 – 481.CrossRefGoogle Scholar
Nguyen, T. T., Raupach, M. and Janik, L. J., 1987 Fourier-transform infrared study of ethylene-glycol monoethyl ether adsorbed on montmorillonite: Implications for surface area measurements of clays Clays & Clay Minerals 35 60 – 67.CrossRefGoogle Scholar
Odom, J. W. and Low, P. F., 1978 Relationship between swelling, surface area and b dimension of Na-montmoril-lonites Clays & Clay Minerals 26 345 – 351.CrossRefGoogle Scholar
Pons, C. H., Rousseaux, F. and Tchoubar, D., 1981 Utilisation du rayonnement synchrotron en diffusion aux petits angles pour l’étude du gonflement des smectites: Etude du système eau-montmorillonite-Na en fonction de la temperature Clay Miner. 16 33 – 42.CrossRefGoogle Scholar
Pons, C. H., Tessier, D., Ben Rahiem, H., Tchoubar, D., van Olphen, H. and Veniale, F., 1982 A comparison between X-ray studies and electron microscopy observations of smectite fabric Proc. Int. Clay Conf., Bologna, Pavia, 1981 Amsterdam Elsevier 177 – 183.Google Scholar
Reynolds, R. C., Brindley, G. W. and Brown, G., 1980 Interstratified clay minerals Crystal Structures of Clay Minerals and Their X-ray Identification London mineralogical Society 249 – 303.CrossRefGoogle Scholar
Rhoades, J. D., Ingvalson, R. D. and Stumpf, H. T., 1969 Interlayer spacing of expanded clay minerals at various swelling pressures: An X-ray diffraction technique for direct determination Soil Sci. Soc. Amer. J. 33 473 – 475.CrossRefGoogle Scholar
Stucki, J. W., 1981 The quantitative assay of minerals for Fe2+ and Fe3+ using 1,10-phenanthroline: II. A photochemical method Soil Sci. Soc. Amer. J. 45 638 – 641.CrossRefGoogle Scholar
Stucki, J. W., Golden, D.C. and Roth, C.B., 1984 Effects of reduction and reoxidation of structural iron on the surface charge and dissolution of dioctahedral smectites Clays & Clay Minerals 32 350 – 356.CrossRefGoogle Scholar
Stucki, J. W., Low, P. F., Roth, C. B. and Golden, D. C., 1984 Effects of oxidation state of octahedral iron on clay swelling Clays & Clay Minerals 32 357 – 362.CrossRefGoogle Scholar
van Olphen, H., 1963 An Introduction to Clay Colloid New York Chemistry: Wiley-Interscience 251 – 270.Google Scholar
Viani, B. E., Low, P. F. and Roth, C. B., 1983 Direct measurement of the relation between interlayer force and interlayer distance in the swelling of montmorillonite J. Colloid Interface Sci. 96 229 – 244.CrossRefGoogle Scholar
Viani, B. E., Roth, C. B. and Low, P. F., 1985 Direct measurement of the relation between swelling pressure and interlayer distance in Li-vermiculite Clays & Clay Minerals 33 244 – 250.CrossRefGoogle Scholar
Wu, J., Low, P. F. and Roth, C. B., 1989 Effects of octahedral-iron reduction and swelling pressure on interlayer distances in Na-nontronite Clays & Clay Miner. 37 211 – 218.Google Scholar