Colloid deposition kinetics with surface-active agents: Evidence for discrete surface charge effects
- Univ. of California, Irvine, CA (United States). Dept. of Civil and Environmental Engineering
Interest in the subject of colloid-mediated contaminant transport in porous media has stimulated numerous investigators to define the conditions under which particle movement may be environmentally relevant. Latex particle deposition kinetics in granular quartz beds were compared with and without surface-active agents to evaluate the effects of surface heterogeneities. Hydrophobic regions or metal oxide impurities were masked with sodium dodecyl sulfate (SDS) or phosphate, respectively. Deposition rates exhibited a remarkable ionic strength sensitivity in the presence of 10[sup [minus]3] M SDS that was similar to unfavorable filtration predictions using DLVO theory. The strong influence of SDS on particle deposition rates indirectly suggests that particle attachment is enhanced by uncharged, hydrophobic regions of the latex or quartz. Phosphate had little effect on either electrophoretic mobilities or particle deposition rates.
- OSTI ID:
- 7163777
- Journal Information:
- Journal of Colloid and Interface Science; (United States), Journal Name: Journal of Colloid and Interface Science; (United States) Vol. 165:2; ISSN 0021-9797; ISSN JCISA5
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
540210* -- Environment
Terrestrial-- Basic Studies-- (1990-)
ADSORPTION
ELASTOMERS
ENVIRONMENTAL TRANSPORT
LATEX
MASS TRANSFER
MINERALS
ORGANIC COMPOUNDS
ORGANIC POLYMERS
OXIDE MINERALS
PERFORMANCE
POLLUTANTS
POLYMERS
QUARTZ
RUBBERS
SORPTION
SORPTIVE PROPERTIES
SURFACE PROPERTIES
SURFACTANTS