Hydrosol deposition in granular media under unfavorable surface conditions

Abstract

Hydrosol deposition in granular media under unfavorable surface conditions was studied. The theoretical part of the study examined the interaction of a particle with patch-like charged regions on the surface of a sphere. Expressions were derived for the double layer interaction between particle and patched surface and for the extent of particle deposition onto such a surface. Deposition experiments were performed under a range of conditions and their results compared with predictions based on the above model. A procedure to quantify the blocking effect of deposited particles on further deposition was also developed and the results compared with experimental data on transient deposition behavior.