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Colloidal suspensions hydrodynamic retention mechanisms in model porous media; Mecanismes de retention hydrodynamique de suspensions colloidales en milieux poreux modeles

Abstract

This study deals with the retention mechanisms of colloidal particles in porous media flows, and the subsequent reduction in permeability in the case of stable and non adsorbing colloids. It combines experimental results and modelling. This study has been realised with stable dispersion of monodispersed carboxylate polystyrene latexes negatively charged injected through negatively charged polycarbonate membranes having mono-sized cylindrical pores. The mean particle diameter is smaller than the mean pore diameter. Both batch and flow experiments in Nuclepore membranes have been done. The results of batch experiments have proved no adsorption of the colloidal latex particles on the surface of the Nuclepore membranes without flow at low salinity. In flow experiments at low particle concentration, only deposition on the upstream side of the membrane have been induced by hydrodynamic forces even for non adsorbing particles without creating any permeability reduction. The retention levels are zero at low and high Peclet numbers with a maximum at intermediate values. Partial plugging was observed at higher colloid concentration even at low salinity without any upstream surface deposition. The modelling of plugging processes is achieved by considering the particle concentration, fluid rate and ratio between the mean pore diameter and the mean particle diameter.  More>>
Authors:
Publication Date:
Apr 19, 1996
Product Type:
Thesis/Dissertation
Report Number:
IFP-42985
Reference Number:
SCA: 540230; 540250; 540320; PA: AIX-28:007427; EDB-97:009343; NTS-97:005761; SN: 97001715336
Resource Relation:
Other Information: TH: These (D. es Sc.).; PBD: 19 Apr 1996
Subject:
54 ENVIRONMENTAL SCIENCES; FOULING; PARTICULATES; MEMBRANE TRANSPORT; CARBOXYLIC ACIDS; ELECTROPHORESIS; HEAVY IONS; LATEX; MATHEMATICAL MODELS; MEMBRANES; PERMEABILITY; POLYSTYRENE; POROUS MATERIALS; PURIFICATION; REMEDIAL ACTION; ROUGHNESS; SALINITY; SCANNING ELECTRON MICROSCOPY; SURFACE POTENTIAL; SUSPENSIONS; TRANSMISSION ELECTRON MICROSCOPY; ULTRAFILTRATION; WATER TREATMENT
OSTI ID:
411274
Research Organizations:
Institut Francais du Petrole (IFP), 92 - Rueil-Malmaison (France); Paris-11 Univ., 91 - Orsay (France)
Country of Origin:
France
Language:
French
Other Identifying Numbers:
Other: ON: DE97610208; TRN: FR9603274007427
Availability:
INIS; OSTI as DE97610208
Submitting Site:
FRN
Size:
193 p.
Announcement Date:
Jan 14, 1997

Citation Formats

Salehi, N. Colloidal suspensions hydrodynamic retention mechanisms in model porous media; Mecanismes de retention hydrodynamique de suspensions colloidales en milieux poreux modeles. France: N. p., 1996. Web.
Salehi, N. Colloidal suspensions hydrodynamic retention mechanisms in model porous media; Mecanismes de retention hydrodynamique de suspensions colloidales en milieux poreux modeles. France.
Salehi, N. 1996. "Colloidal suspensions hydrodynamic retention mechanisms in model porous media; Mecanismes de retention hydrodynamique de suspensions colloidales en milieux poreux modeles." France.
@misc{etde_411274,
title = {Colloidal suspensions hydrodynamic retention mechanisms in model porous media; Mecanismes de retention hydrodynamique de suspensions colloidales en milieux poreux modeles}
author = {Salehi, N}
abstractNote = {This study deals with the retention mechanisms of colloidal particles in porous media flows, and the subsequent reduction in permeability in the case of stable and non adsorbing colloids. It combines experimental results and modelling. This study has been realised with stable dispersion of monodispersed carboxylate polystyrene latexes negatively charged injected through negatively charged polycarbonate membranes having mono-sized cylindrical pores. The mean particle diameter is smaller than the mean pore diameter. Both batch and flow experiments in Nuclepore membranes have been done. The results of batch experiments have proved no adsorption of the colloidal latex particles on the surface of the Nuclepore membranes without flow at low salinity. In flow experiments at low particle concentration, only deposition on the upstream side of the membrane have been induced by hydrodynamic forces even for non adsorbing particles without creating any permeability reduction. The retention levels are zero at low and high Peclet numbers with a maximum at intermediate values. Partial plugging was observed at higher colloid concentration even at low salinity without any upstream surface deposition. The modelling of plugging processes is achieved by considering the particle concentration, fluid rate and ratio between the mean pore diameter and the mean particle diameter. This study can be particularly useful in the fields of water treatment and of restoration of lands following radioactive contamination. (author). 96 refs., 99 figs., 29 tabs.}
place = {France}
year = {1996}
month = {Apr}
}