Natural and Passive Remediation of Chlorinated Solvents: Critical Evaluation of Science and Technology Targets Page: 60 of 150
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WSRC-TR-2003-00328
February 19, 2004Enhancements to Natural Processes
Large-scale
Microbiology [Phytoremediation hydrology- Biostimulation
" Improvements to
electron donors
" Passive delivery
- Bioaugmentation
" Anaerobic systems
(with
Dehalococcoides)
" Aerobic systems (wits
JS666)
Abiotic Processes
Enhance FeS precipitation
(biostimulation)- Species/clone selection:
" Widely adapted
" Carbon to root production
" Amount and type of
exudates
" Function under stress
" Metabolism of
contaminants
" Water uptake
" Transpiration/
Translocation rate
- Fertilization strategy
- Layered construction
- Genetic transformationsScenarios
Taxanomic key to
help define multiple
lines of evidence- Bypass of upgradient
H20
- Decrease infiltration
throughout plume
" Increase runoff
" Incr. evapotrans.
- Decrease flux through
source
- Bypass of competing
electron acceptorsInterfaces
- Expand groundwater-
surface water zone
- Create new interfaces
- Create vadose-groundwater
reaction zone
- Consider volatilization
from surface waterFigure 5 Lines of inquiry for the principal components of natural attenuation where
enhancements may improve their efficiency.
For example, using engineered or phyto-based approaches in the source region has the
potential to reduce the flow of groundwater or infiltration of recharge water through the
source zone. These modifications directly impact the contaminant flux or mass loading to a47
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Looney, Brian. Natural and Passive Remediation of Chlorinated Solvents: Critical Evaluation of Science and Technology Targets, report, April 7, 2004; South Carolina. (https://digital.library.unt.edu/ark:/67531/metadc784748/m1/60/: accessed April 25, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.