Analytical modeling of aquifer decontamination by pulsed pumping when contaminant transport is affected by rate-limited sorption and desorption. Master's thesis

Technical Report · Wed Sep 01 04:00:00 EDT 1993

OSTI ID:5570531

Adams, T A; Viramontes, R C

This research explores radially convergent contaminated transport in an aquifer towards an extraction well. This thesis presents the equations governing the transport of a contaminant during aquifer remediation by pulsed pumping. Contaminant transport is assumed to be affected by radial advection, dispersion, and sorption/desorption. Sorption is assumed to be either equilibrium or rate-limited, with the rate-limitation described by either a first-order law, or by Fickian diffusion of contaminant through layered, cylindrical, or spherical immobile water regions. The equations are derived using an arbitrary initial distribution of contaminant in both the mobile and immobile regions, and they are analytically solved in the Laplace domain using a Green's function solution. The Laplace solution is then converted to a formula translation (FORTRAN) source code and numerically inverted back to the time domain. The resulting model is tested against another analytical Laplace transform model and a numerical finite element and finite difference model. Model simulations are used to show how pulsed pumping operations can improve the efficiency of contaminated aquifer pump and treat remediation activities. Aquifer decontamination, Analytical modeling, Pulsed pumping, Rate-limited sorption/desorption, Contaminant transport modeling.

• Research Organization: Air Force Inst. of Tech., Wright-Patterson AFB, OH (United States). School of Engineering
• OSTI ID: 5570531
• Report Number(s): AD-A-271105/9/XAB
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
540320* -- Environment
Aquatic-- Chemicals Monitoring & Transport-- (1990-)
99 GENERAL AND MISCELLANEOUS
990200 -- Mathematics & Computers
ADVECTION
ANALYTICAL SOLUTION
AQUIFERS
CALCULATION METHODS
CLEANING
COMPUTERIZED SIMULATION
CONTROL
DECONTAMINATION
DESORPTION
DIFFUSION
ENVIRONMENTAL TRANSPORT
EQUATIONS
EQUILIBRIUM
EXTRACTION
FINITE ELEMENT METHOD
FORTRAN
MASS TRANSFER
NUMERICAL SOLUTION
POLLUTION CONTROL
PROGRAMMING LANGUAGES
PUMPING
PUMPS
REMEDIAL ACTION
RESOLUTION
SEPARATION PROCESSES
SIMULATION
SORPTION
TIME RESOLUTION
TIMING PROPERTIES
WATER POLLUTION CONTROL