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Colloid-associated contaminant transport in porous media: 2. Mathematical modeling

DSpace at IIT Bombay

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Field Value
 
Title Colloid-associated contaminant transport in porous media: 2. Mathematical modeling
 
Creator SEN, TK
NALWAYA, N
KHILAR, KC
 
Subject facilitated transport
fractured media
groundwater
existence
 
Description A comprehensive mathematical model developed describes the colloid-associated contaminant transport in groundwater flows based on equilibrium adsorption of contaminants, hydrodynamic release, migration, and capture of colloidal fines in groundwater flows. This model is more realistic than the existing models in that the physics of migration of colloidal fines is adequately incorporated. It also accounts for the entrapment and plugging of fine particles and, therefore, predicts both facilitation and retardation of the transport of contaminants depending on the flow and other conditions. The conditions leading to inhibition/retardation of contaminant transport due to plugging are: high release coefficient, low initial porosity, high inlet fines concentration, and high initial permeability. The mobilization and migration of colloidal fines, kaolin and their role on plugging, as well as on Ni2+ contaminant transport through kaolin-sand packed beds, were studied, and the model was tested with published experimental measurements, as well as with our laboratory column results. The plugging-based retardation of contaminant transport can be used to develop a new containment technique.
 
Publisher AMER INST CHEMICAL ENGINEERS
 
Date 2011-07-15T11:06:51Z
2011-12-26T12:49:26Z
2011-12-27T05:49:55Z
2011-07-15T11:06:51Z
2011-12-26T12:49:26Z
2011-12-27T05:49:55Z
2002
 
Type Article
 
Identifier AICHE JOURNAL, 48(10), 2375-2385
0001-1541
http://dx.doi.org/10.1002/aic.690481027
http://dspace.library.iitb.ac.in/xmlui/handle/10054/4251
http://hdl.handle.net/10054/4251
 
Language en