LARGE EFFECT OF LEACHING OF DOC ON WATER-ADSORPTION PROPERTIES OF A SANDY SOIL

Citation
G. Jozefaciuk et al., LARGE EFFECT OF LEACHING OF DOC ON WATER-ADSORPTION PROPERTIES OF A SANDY SOIL, Geoderma, 74(1-2), 1996, pp. 125-137
Citations number
28
Categorie Soggetti
Agriculture Soil Science
Journal title
ISSN journal
00167061
Volume
74
Issue
1-2
Year of publication
1996
Pages
125 - 137
Database
ISI
SICI code
0016-7061(1996)74:1-2<125:LEOLOD>2.0.ZU;2-Y
Abstract
In this study, changes of adsorption properties of a sandy soil from a former sewage farm due to the leaching of dissolved organic carbon (D OG) were examined. The leaching of DOC at various pH levels was simula ted in laboratory experiment using sodium hydroxide as the leaching ag ent. An increase of pH resulted in an increase of the amount of DOC in the studied soil. The removal of DOC altered the surface properties o f the remaining solid. In particular, the surface area was reduced and the water vapour adsorption energy distribution function was shifted to lower energy ranges, thus showing the increase of the hydrophobic c haracter of the soil, The intensity of these changes was more pronounc ed when the soil had been previously acidified.