6
Permeable Reactive Barrier
FIGURE 1.1
Dynamics of fluids in fractured rock. (Photograph by Dr. Jessica Winder.)
the contaminant species may migrate in rock fractures (Figure 1.1). Once distributed in rock factures, contaminant assessment, delineation, and remediation become an extremely challenging and expensive process. This is further
constrained by a lack of regulatory policies dealing with endpoints for remediation of such contaminated sites. Often where such sites have been remediated, rebound from rock fractures has also been a major challenge.
The schematic diagram in Figure 1.2 shows a dense NAPL completely filling pores in the subsurface soil/groundwater environment and also coating
soil particles, which makes delineation of the contaminant plume challenging and often very difficult.
DNAPLs completely
DNAPLs coating
filling in pores
soil particles
DNAPL
Soil particle
Soil particle
DNAPL
FIGURE 1.2
Dense nonaqueous phase liquid (DNAPL) interactions with soils in vadose zone.
Permeable Reactive Barrier
FIGURE 1.1
Dynamics of fluids in fractured rock. (Photograph by Dr. Jessica Winder.)
the contaminant species may migrate in rock fractures (Figure 1.1). Once distributed in rock factures, contaminant assessment, delineation, and remediation become an extremely challenging and expensive process. This is further
constrained by a lack of regulatory policies dealing with endpoints for remediation of such contaminated sites. Often where such sites have been remediated, rebound from rock fractures has also been a major challenge.
The schematic diagram in Figure 1.2 shows a dense NAPL completely filling pores in the subsurface soil/groundwater environment and also coating
soil particles, which makes delineation of the contaminant plume challenging and often very difficult.
DNAPLs completely
DNAPLs coating
filling in pores
soil particles
DNAPL
Soil particle
Soil particle
DNAPL
FIGURE 1.2
Dense nonaqueous phase liquid (DNAPL) interactions with soils in vadose zone.