Adsorption von Wasser, Äthylenglycolmonoethyläther sowie Stickstoff und ihre Beziehung zu Eigenschaften deutscher und israelischer Bodenproben

Adsorption of Water, Ethylene Glycol Monoethyl Ether as well as Nitrogen and its Relation to Properties of German and Israeli Soil Samples To determine the specific surface area, samples taken from 140 soil horizons were selected and the significant physical and chemical properties were investigated. The specific surface area of the samples was determined by adsorption of H₂O, ethylene glycol monoethyl ether (EGME) and N₂. A comparison of the three methods shows that the specific surface area determined by the adsorption of H₂O and EGME does not differ significantly. However, the specific surface determined by N₂-adsorption differs markedly from the results obtained using the polar substances. As a dependent variable the specific surface area is mainly influenced by the clay content and clay mineral type. Further, the organic substance content as well as the iron- and manganoxide content have a more significant influence on the specific surface area the lower the clay content is, or the content of three layer minerals. As an independent variable, the specific surface area determined by adsorption of EGME, proved to be the characteristic soil factor which reflects the effective cation exchange capacity as well as the hygroscopicity with the highest degree of accuracy.