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Title: Injection of Zero Valent Iron into an Unconfined Aquifer Using Shear-Thinning Fluids

Abstract

Approximately 190 kg of two micron-diameter zero-valent iron (ZVI) particles were injected into a test zone in the top two meters of an unconfined aquifer within a trichloroethene (TCE) source area. A shear-thinning fluid was used to enhance ZVI delivery in the subsurface to a radial distance of up to four meters from a single injection well. The ZVI particles were mixed in-line with the injection water, shear-thinning fluid, and a low concentration of surfactant. ZVI was observed at each of the seven monitoring wells within the targeted radius of influence during injection. Additionally, all wells within the targeted zone showed low TCE concentrations and primarily dechlorination products present 44 days after injection. These results suggest that ZVI can be directly injected into an aquifer with shear-thinning fluids and extends the applicability of ZVI to situations where other emplacement methods may not be viable.

Authors:
; ; ; ; ; ; ;
Publication Date:
Research Org.:
Pacific Northwest National Laboratory (PNNL), Richland, WA (US), Environmental Molecular Sciences Laboratory (EMSL)
Sponsoring Org.:
USDOE
OSTI Identifier:
1009737
Report Number(s):
PNNL-SA-70324
Journal ID: ISSN 1069-3629; 14892; 25641; 400403209; TRN: US201107%%844
DOE Contract Number:  
AC05-76RL01830
Resource Type:
Journal Article
Journal Name:
Ground Water Monitoring and Remediation, 31(1):50-58
Additional Journal Information:
Journal Volume: 31; Journal Issue: 1; Journal ID: ISSN 1069-3629
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; AQUIFERS; DECHLORINATION; INJECTION WELLS; IRON; METERS; MONITORING; POSITIONING; WATER; chlorinated solvent; zero-valent iron; remediation; Environmental Molecular Sciences Laboratory

Citation Formats

Truex, Michael J., Vermeul, Vincent R., Mendoza, Donaldo P., Fritz, Brad G., Mackley, Rob D., Oostrom, Martinus, Wietsma, Thomas W., and Macbeth, Tamzen. Injection of Zero Valent Iron into an Unconfined Aquifer Using Shear-Thinning Fluids. United States: N. p., 2011. Web. doi:10.1111/j.1745-6592.2010.01319.x.
Truex, Michael J., Vermeul, Vincent R., Mendoza, Donaldo P., Fritz, Brad G., Mackley, Rob D., Oostrom, Martinus, Wietsma, Thomas W., & Macbeth, Tamzen. Injection of Zero Valent Iron into an Unconfined Aquifer Using Shear-Thinning Fluids. United States. doi:10.1111/j.1745-6592.2010.01319.x.
Truex, Michael J., Vermeul, Vincent R., Mendoza, Donaldo P., Fritz, Brad G., Mackley, Rob D., Oostrom, Martinus, Wietsma, Thomas W., and Macbeth, Tamzen. Fri . "Injection of Zero Valent Iron into an Unconfined Aquifer Using Shear-Thinning Fluids". United States. doi:10.1111/j.1745-6592.2010.01319.x.
@article{osti_1009737,
title = {Injection of Zero Valent Iron into an Unconfined Aquifer Using Shear-Thinning Fluids},
author = {Truex, Michael J. and Vermeul, Vincent R. and Mendoza, Donaldo P. and Fritz, Brad G. and Mackley, Rob D. and Oostrom, Martinus and Wietsma, Thomas W. and Macbeth, Tamzen},
abstractNote = {Approximately 190 kg of two micron-diameter zero-valent iron (ZVI) particles were injected into a test zone in the top two meters of an unconfined aquifer within a trichloroethene (TCE) source area. A shear-thinning fluid was used to enhance ZVI delivery in the subsurface to a radial distance of up to four meters from a single injection well. The ZVI particles were mixed in-line with the injection water, shear-thinning fluid, and a low concentration of surfactant. ZVI was observed at each of the seven monitoring wells within the targeted radius of influence during injection. Additionally, all wells within the targeted zone showed low TCE concentrations and primarily dechlorination products present 44 days after injection. These results suggest that ZVI can be directly injected into an aquifer with shear-thinning fluids and extends the applicability of ZVI to situations where other emplacement methods may not be viable.},
doi = {10.1111/j.1745-6592.2010.01319.x},
journal = {Ground Water Monitoring and Remediation, 31(1):50-58},
issn = {1069-3629},
number = 1,
volume = 31,
place = {United States},
year = {2011},
month = {2}
}