In-situ chemical barrier and method of making

Patent · Fri Jan 01 00:00:00 EST 1999

OSTI ID:872086

Cantrell, Kirk J ^[1]; Kaplan, Daniel I ^[2]

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1. West Richland, WA
2. Richland, WA

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.

• Research Organization: Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
• DOE Contract Number: AC06-76RL01830
• Assignee: Battelle Memorial Institute (Richland, WA)
• Patent Number(s): US 5857810
• OSTI ID: 872086
• Country of Publication: United States
• Language: English

Related Subjects

in-situ
chemical
barrier
method
formed
injecting
suspension
solid
particles
colloids
subsurface
stable
colloid
including
surfactant
non-newtonian
fluid
characterized
concentration
size
material
solution
ionic
strength
composition
step
involves
optimized
sufficiently
flow
rate
move
sediment
induce
resuspending
indigenous
soil
aquifer
withdrawal
draw
injected
direction
perpendicular
path
contaminant
plume
injection
third
line
increasing
length
process
emplacement
complete
direction perpendicular
chemical composition
solid particles
flow rate
flow path
solid particle
soil particles
chemical barrier
newtonian fluid
in-situ chemical
subsurface sediment
involves injecting
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