Document Detail


Deviation from the classical colloid filtration theory in the presence of repulsive DLVO interactions.
MedLine Citation:
PMID:  15568829     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
A growing body of experimental evidence suggests that the deposition behavior of microbial particles (e.g., bacteria and viruses) is inconsistent with the classical colloid filtration theory (CFT). Well-controlled laboratory-scale column deposition experiments were conducted with uniform model particles and collectors to obtain insight into the mechanisms that give rise to the diverging deposition behavior of microorganisms. Both the fluid-phase effluent particle concentration and the profile of retained particles were systematically measured over a broad range of physicochemical conditions. The results indicate that, in the presence of repulsive Derjaguin-Landau-Verwey-Overbeek (DLVO) interactions, the concurrent existence of both favorable and unfavorable colloidal interactions causes significant deviation from the CFT. A dual deposition mode model is presented which considers the combined influence of "fast" and "slow" particle deposition. This model is shown to adequately describe both the spatial distribution of particles in the packed bed and the suspended particle concentration at the column effluent.
Authors:
Nathalie Tufenkji; Menachem Elimelech
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, Non-P.H.S.    
Journal Detail:
Title:  Langmuir : the ACS journal of surfaces and colloids     Volume:  20     ISSN:  0743-7463     ISO Abbreviation:  Langmuir     Publication Date:  2004 Dec 
Date Detail:
Created Date:  2004-11-30     Completed Date:  2006-05-30     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  9882736     Medline TA:  Langmuir     Country:  United States    
Other Details:
Languages:  eng     Pagination:  10818-28     Citation Subset:  IM    
Affiliation:
Department of Chemical Engineering, McGill University, Montreal, Quebec H3A 2B2, Canada. nathalie.tufenkji@mcgill.ca
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MeSH Terms
Descriptor/Qualifier:
Colloids / chemistry*
Electrochemistry
Filtration / classification,  methods
Kinetics
Models, Chemical*
Particle Size
Surface Properties
Chemical
Reg. No./Substance:
0/Colloids

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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