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| International Agrophysics |
| publisher: | Institute of Agrophysics
Polish Academy of Sciences
Lublin, Poland |
| ISSN: |
0236-8722 |
vol. 9, nr. 2 (1995)
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The surface properties of humic acids extracted from chernozem and grey-brown podzolic soils
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M. Flis-Bujak1, A. Księżopolska2, J. Stawiński2, R. Turski1
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1 Institute of Soil Science and Environment Management, University of Agriculture, ul.Kr. Leszczyńskiego 7,20-069 Lublin, Poland |
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2 Institute of Agrophysics, Polish Academy of Science, Doświadczalna 4,20-236 Lublin, Poland |
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vol. 9 (1995), nr. 2,
pp. 115-123
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abstract
The authors characterized selected surface properties of humic acid preparations extracted from three types of Polish soils (degraded chernozem developed from loess, grey-brown podzolic soil developed from loam, grey-brown podzolic soil developed from loess). Based on the isotherms of water vapour adsorption, the specific surface area and the molar energy of adsorption were calculated; the effect of agrotechnical measures in multi-year cultivation on the surface properties of the humic acids under study was determined, and the effect of contamination of humic acids on the form of the isotherms of water vapour adsorption was analyzed.
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keywords
adsorption, specific surface area, molar energy of adsorption
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