Premium
Surfactant and water migration in unsaturated sand
Author(s) -
Tschapek M.,
Boggio L.
Publication year - 1981
Publication title -
zeitschrift für pflanzenernährung und bodenkunde
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.644
H-Index - 87
eISSN - 1522-2624
pISSN - 0044-3263
DOI - 10.1002/jpln.19811440106
Subject(s) - pulmonary surfactant , surface tension , capillary action , water pressure , capillary pressure , pressure gradient , vadose zone , tension (geology) , significant difference , composite material , geology , materials science , mineralogy , geotechnical engineering , chemistry , thermodynamics , groundwater , ultimate tensile strength , porous medium , biochemistry , physics , oceanography , porosity , statistics , mathematics
1 In unsaturated coarse disperse materials such as sand, the water on the surface is continous and ‘deep’ enough to be an adequate medium for the migration of surface active substances (SAS). 2 The influence of the tangential force on water migration in unsaturated coarse disperse material is studied by compensating the capillary pressure difference caused by the surface tension gradient. 3 The influence on water migration in unsaturated disperse materials exerted by the additional pressure difference, originating from SAS migration, is comparable to that exerted by capillary pressure difference.