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Nanoporosity Characteristics of Some Natural Clay Minerals and Soils

Published online by Cambridge University Press:  01 January 2024

R. Aringhieri
R. Aringhieri*
Affiliation:
CNR, Institute of Ecosystem Studies (ISE), Division of Soil Chemistry, Research Area, Via G. Moruzzi 1, 56124 Pisa, Italy
*
*E-mail address of corresponding author: [email protected]
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Abstract

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Limited information is available on microporosity in soils. A study was undertaken to investigate the micropore characteristics of four soil samples, with different particle-size distributions, and four natural silicate clay minerals. Specific surface area and the differential micropore-size distribution were taken into account to characterize the microstructure of the soils and clays. The micropore-size distributions showed a maximum contribution to the total microporosity by pores having an effective pore radius of ∼20 Å, thus indicating that that category of pore contributes more than others to the total microporosity of the system. For both soils and clays a good exponential correlation was found between the maximum contribution to the microporosity and their specific surface area. A linear relationship was also found between the microporosity of the soils and their clay content. It has been concluded that the micropore system formed by 20 Å pores is mainly located in the clay fraction of the soil, and contributes significantly to defining some of the most notable physicochemical properties of soils and clays.

Keywords

Clay MicroporosityMicropore-size DistributionSoil MicroporositySurface Area
Type
Research Article
Information
Clays and Clay Minerals , Volume 52 , Issue 6 , December 2004 , pp. 700 - 704
Copyright
Copyright © 2004, The Clay Minerals Society

References

Aringhieri, R. and Giachetti, M., (1994) Microporosity of the soil as related to different particle size distributions and mineralogy XVI General Meeting of the International Mineralogical Association Italy Pisa 16 Abstracts.Google Scholar
Aringhieri, R. and Giachetti, M. (1999) Structure characteristics of soils from the coastal plain of Tuscany (Italy). 6thInternational Meeting on Soils with Mediterranean Type of Climate, Barcelona, Spain, pp. 376–378.Google Scholar
Aylmore, L.A.G. and Quirk, J.P., (1967) The micropore size distribution of clay mineral systems Journal of Soil Science 18 1–17 10.1111/j.1365-2389.1967.tb01481.x.CrossRefGoogle Scholar
Brunauer, S. Emmett, P.H. and Teller, E., (1938) Adsorption of gases in multimolecular layers Journal of the American Chemical Society 60 309–319 10.1021/ja01269a023.CrossRefGoogle Scholar
Dubinin, M.M., (1960) The potential theory of adsorption of gases and vapors for adsorbents with energetically nonuniform surfaces Chemical Revue 60 235–241 10.1021/cr60204a006.CrossRefGoogle Scholar
Everett, D.H., (1972) Manual of symbols and terminology for physico-chemical quantities and units. Appendix II. Definitions, terminology and symbols in colloid and surface chemistry, part 1 Pure and Applied Chemistry 31 579–638 10.1351/pac197231040577.CrossRefGoogle Scholar
Gregg, S.J. and Sing, K.S.W., (1967) Adsorption Surface Area and Porosity London & New York Academic Press 10.1149/1.2426447.CrossRefGoogle Scholar
Greenland, D.J., (1977) Soil damage by intensive arable cultivation: temporary or permanent? Philosophical Transaction of the Royal Society (London) B281 193–208 10.1098/rstb.1977.0133.Google Scholar
Greenland, D.J., Lal, R. and Greenland, D.J., (1979) Structural organization of soil and crop production Soil Physical Properties and Crop Production in the Tropics New York John Wiley & Sons, Ltd. 47–56.Google Scholar
Lowell, S., (1979) Introduction to Powder Surface Area New York John Wiley & Sons, Inc..Google Scholar
Marczewski, A.W. (2002) A practical guide to isotherms of adsorption on heterogeneous surfaces. Adsorption Glossary. .Google Scholar
Murray, R.S. Coughlan, K.J. and Quirk, J.P., (1985) Nitrogen sorption isotherms and the microstructure of Vertisols Australian Journal of Soil Research 23 137–149 10.1071/SR9850137.CrossRefGoogle Scholar
Oades, J.M., (1986) Associations of colloidal materials in soils Transactions of the XIII Congress of the International Soil Science Society VI 660–674 Hamburg.Google Scholar
Parfitt, R.L. and Greenland, D.J., (1970) Adsorption of polysaccharides by montmorillonite Soil Science Society of America Journal 34 862–866 10.2136/sssaj1970.03615995003400060016x.CrossRefGoogle Scholar
Ponec, V. Knor, Z. and Černý, S., (1974) Adsorption on Solids London CRC Press, Butterworth & Co. Ltd..Google Scholar
Quirk, J.P., (1994) Interparticle forces: a basis for the interpretation of soil physical behaviour Advances in Agronomy 53 121–183 10.1016/S0065-2113(08)60614-8.CrossRefGoogle Scholar
Quirk, J.P. (1999) Clay domains, interparticle forces and sodicity. Fixing the Foundations Symposium: Australian Academy of Science, Adelaide, Australia.Google Scholar
Ristori, G.G. Cecconi, S. and Martelloni, C., (1983) Superficie specifica e microporosità di alcuni terreni tipici italiani Agrochimica XXVII-n∘1 20–28.Google Scholar