CONCENTRATED DISPERSIONS OF CHARGED COLLOIDAL PARTICLES - SEDIMENTATION, ULTRAFILTRATION AND DIFFUSION

被引:73
作者
PETSEV, DN
STAROV, VM
IVANOV, IB
机构
[1] UNIV SOFIA,FAC CHEM,THERMODYNAM & PHYSICOCHEM HYDRODYNAM LAB,BU-1126 SOFIA,BULGARIA
[2] MOSCOW INST FOOD TECHNOL,DEPT MATH,MOSCOW,RUSSIA
关键词
CHARGED COLLOIDAL PARTICLES; CONCENTRATED DISPERSIONS; DIFFUSION; SEDIMENTATION; ULTRAFILTRATION;
D O I
10.1016/0927-7757(93)80235-7
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
The formation and structure of sedimentation and/or filtration layers built up by charged colloidal particles were studied. For that purpose a theoretical model based on the force balance on a given particle in the layer was developed. The colloid stability problem and appearance of coagulation were considered. The hydrodynamic permeability of a filtration layer, consisting of charged particles, was calculated for different values of the electrolyte concentration, filtration rate, particle surface potential and radius. A simple expression for estimation of the collective diffusion coefficient of charged colloidal particles at relatively high volume fractions was also proposed.
引用
收藏
页码:65 / 81
页数:17
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