Filtration of polydispersed colloids

Conference · Fri Jan 01 04:00:00 EST 1988

OSTI ID:5532948

Nuttall, H E ^[1]

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1. Earth and Space Sciences Div., Los Alamos National Lab., Los Alamos, NM (US)

In this study, the dynamic microscopic form of the population balance model is applied to the problem of polydispersed particle capture in one spatial diffusion. This mathematical modeling approach can be applied to the difficult and potentially important problem of particulate (radiocolloid) transport in the groundwater surrounding a nuclear waste disposal site. To demonstrate the population balance methodology, the equations were developed and used to investigate transport and capture of polydispersed colloids in packed columns. Modeling simulations were compared to experimental column data. The multidimensional form of the population balance equation was used to analyze the transport and capture of polydispersed colloids. A numerical model was developed to describe transport of polydispersed colloids through a one-dimensional porous region. The effects of various size distributions were investigated in terms of capture efficiency. For simulating the column data, it was found by trial and error that as part of the population balance model a linear size dependent filtration function gave a good fit to the measured colloid concentration profile. The effects of constant versus size dependent filtration coefficients were compared and the differences illustrated by the calculated colloid profile within the column. Also observed from the model calculations was the dramatically changing liquid-phase colloid-size distribution which was plotted as a function of position down the column. This modeling approach was excellent for describing and understanding microscopic filtration in porous media.

• OSTI ID: 5532948
• Report Number(s): CONF-880348--
• Country of Publication: United States
• Language: English

Related Subjects

052002* -- Nuclear Fuels-- Waste Disposal & Storage
053000 -- Nuclear Fuels-- Environmental Aspects
11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS
12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES
520300 -- Environment
Aquatic-- Radioactive Materials Monitoring & Transport-- (1989)
54 ENVIRONMENTAL SCIENCES
COLLOIDS
DISPERSIONS
ECOLOGICAL CONCENTRATION
EMISSION
ENVIRONMENTAL TRANSPORT
FLOW MODELS
GROUND WATER
HYDROGEN COMPOUNDS
MANAGEMENT
MASS TRANSFER
MATHEMATICAL MODELS
NUCLEAR FACILITIES
OXYGEN COMPOUNDS
POLLUTION
RADIOACTIVE WASTE DISPOSAL
RADIOACTIVE WASTE FACILITIES
RADIOCOLLOIDS
RADIOECOLOGICAL CONCENTRATION
RADIONUCLIDE MIGRATION
WASTE DISPOSAL
WASTE MANAGEMENT
WATER
WATER POLLUTION