Kinetics of Particle Deposition and Detachment
| Autor: | Egon Matijević, Niels P. Ryde |
|---|---|
| Rok vydání: | 1995 |
| Předmět: |
Packed bed
Materials science Mineralogy Surfaces and Interfaces General Chemistry Hematite Surfaces Coatings and Films Colloid Mechanics of Materials Ionic strength Chemical physics visual_art Mass transfer Materials Chemistry visual_art.visual_art_medium Deposition (phase transition) Particle Particle deposition |
| Zdroj: | The Journal of Adhesion. 51:1-14 |
| ISSN: | 1545-5823 0021-8464 |
| DOI: | 10.1080/00218469508009985 |
| Popis: | The packed column technique serves as a useful tool in the investigations of the deposition and removal mechanisms of particles dispersed in a liquid in contact with a solid substrate. A model is presented which can be used to estimate explicitly the effects of multilayer deposition, which is based on three phenomenological parameters: two mass transfer coefficients, and one blocking parameter. The latter accounts for the area occupied by each adhered particle. The method can be used to evaluate the experimental results in terms of the particle-collector and particle-particle interactions. The former are related to heterocoagulation, and the latter to homocoagulation. It is shown that the rate of deposition of hematite particles onto glass beads, in the absence of a repulsion barrier, is governed by a convective diffusion mechanism. If a repulsion barrier exists, the deposition rate depends on the ionic strength in a manner consistent with colloid stability. The adhered particles can be removed b... |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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