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dc.contributor.authorGuzman, Francisco J.en_US
dc.date.accessioned2014-03-14T20:44:24Z
dc.date.available2014-03-14T20:44:24Z
dc.date.issued2012-08-27en_US
dc.identifier.otheretd-08282012-144921en_US
dc.identifier.urihttp://hdl.handle.net/10919/34831
dc.description.abstractDepletion forces were used to separate an equinumber density binary dispersion of 1.5 and 0.82 µm polystyrene sulfate (PS) particles. Experiments consisted of injecting a pulse of a binary dispersion of PS particles into the inlet of a packed bed of 0.5 mm silica collector beads. Prior to injection, a carrier fluid of either KCl and KOH electrolyte or a silica nanoparticle dispersion was flowing through the column at steady state. When the carrier fluid was a dispersion of silica nanoparticles, the ratio of PS particles in the column outlet would change from 1:1 big to small particles to slightly over 2:1. This implies that more of the smaller 0.82 µm particles were being trapped on the surface of the collector beads due to depletion forces. Experiments with a single particle type (either 1.5 or 0.82 µm PS particle) were also done and correlated with the binary dispersion measurements. Potential energy profiles between a PS particle and a flat silica plate were calculated. The secondary energy barrier for the 1.5 µm particles was two times greater than for the 0.82 µm particles. Hence, the 0.82 µm particles were more likely to overcome the energy barrier and get trapped on the surface of the collector beads. Although the potential energy profiles were calculated at equilibrium, they can be used as a tool in finding the optimal conditions for separation.en_US
dc.publisherVirginia Techen_US
dc.relation.haspartGuzman_Francisco_T_2012.pdfen_US
dc.rightsI hereby certify that, if appropriate, I have obtained and attached hereto a written permission statement from the owner(s) of each third party copyrighted matter to be included in my thesis, dissertation, or project report, allowing distribution as specified below. I certify that the version I submitted is the same as that approved by my advisory committee. I hereby grant to Virginia Tech or its agents the non-exclusive license to archive and make accessible, under the conditions specified below, my thesis, dissertation, or project report in whole or in part in all forms of media, now or hereafter known. I retain all other ownership rights to the copyright of the thesis, dissertation or project report. I also retain the right to use in future works (such as articles or books) all or part of this thesis, dissertation, or project report.en_US
dc.subjectColloid Transport; Depletion Forces; Depletion Inten_US
dc.titleSeparation of Colloidal Particles in a Packed Column using Depletion Forcesen_US
dc.typeThesisen_US
dc.contributor.departmentChemical Engineeringen_US
dc.description.degreeMaster of Scienceen_US
thesis.degree.nameMaster of Scienceen_US
thesis.degree.levelmastersen_US
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen_US
thesis.degree.disciplineChemical Engineeringen_US
dc.contributor.committeechairWalz, John Y.en_US
dc.contributor.committeememberMartin, Stephen M.en_US
dc.contributor.committeememberDucker, William A.en_US
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-08282012-144921/en_US
dc.date.sdate2012-08-28en_US
dc.date.rdate2012-10-03
dc.date.adate2012-10-03en_US


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