Clays and Clay Minerals

, Volume 41, Issue 3, pp 346–352 | Cite as

Adsorption of Water Vapor by Soils: Investigations of the Influence of Organic Matter, Iron, and Aluminum on Energetic Heterogeneity of Soil Clays

  • Z. Sokołowska
  • G. Jòzefaciuk
  • S. Sokołowski
  • A. Ourumova-Pesheva


Water vapor adsorption isotherms were measured for samples of loessial soil clays modified by removing organic matter and Fe and Al compounds. The isotherms were analyzed by the exponential adsorption isotherm equation. The distribution functions of adsorption energy, average adsorption energies, and surface areas were evaluated simultaneously. The surface areas were the highest for samples after organic matter removal and the lowest when all considered components were removed. Values of the average adsorption energies decreased consecutively after each of the subsequent removal steps while the energy distributions became narrower, indicating in general less variety in surface adsorbing centers.

Key Words

Soil constituents Surface heterogeneity Water adsorption 


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Copyright information

© The Clay Minerals Society 1993

Authors and Affiliations

  • Z. Sokołowska
    • 1
  • G. Jòzefaciuk
    • 1
  • S. Sokołowski
    • 2
  • A. Ourumova-Pesheva
    • 3
  1. 1.Institute of AgrophysicsPolish Academy of SciencesLublinPoland
  2. 2.Institut für Fluid- und ThermodynamikRuhr-Universität BochumLublinPoland
  3. 3.Institute of Soil Science and AgroecologySofiaBulgaria

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