Hydraulic and earth engineering – Earth treatment or control – Chemical
Patent
1997-02-27
1999-01-12
Taylor, Dennis L.
Hydraulic and earth engineering
Earth treatment or control
Chemical
588250, 588260, 404128, B09B 300
Patent
active
058578102
ABSTRACT:
A chemical barrier is formed by injecting a suspension of solid particles or colloids into the subsurface. First, a stable colloid suspension is made including a surfactant and a non-Newtonian fluid. This stable colloid suspension is characterized by colloid concentration, colloid size, colloid material, solution ionic strength, and chemical composition. A second step involves injecting the optimized stable colloid suspension at a sufficiently high flow rate to move the colloids through the subsurface sediment, but not at such a high rate so as to induce resuspending indigenous soil particles in the aquifer. While injecting the stable colloid suspension, a withdrawal well may be used to draw the injected colloids in a direction perpendicular to the flow path of a contaminant plume. The withdrawal well, may then be used as an injection well, and a third well, in line with the first two wells, may then be used as a withdrawal well, thereby increasing the length of the colloid barrier. This process would continue until emplacement of the colloid barrier is complete.
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Cantrell Kirk J.
Kaplan Daniel I.
Battelle (Memorial Institute)
Taylor Dennis L.
Zimmerman Paul W.
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