skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Geochemical and Geophysical Changes during Ammonia Gas Treatment of Vadose Zone Sediments for Uranium Remediation

Abstract

NH3 gas treatment of low water content sediments resulted in a significant decrease in aqueous and adsorbed uranium, which is attributed to incorporation into precipitates. Uranium associated with carbonates showed little change. Uranium associated with hydrous silicates such as Na-boltwoodite showed a significant decrease in mobility but no change in Na-boltwoodite concentration (by EXAFS/XANES), so is most likely caused by non-U precipitate coatings. Complex resistivity changes occurred in the sediment during NH3 and subsequent N2 gas injection, indicating ERT/IP could be used at field scale for injection monitoring.

Authors:
; ; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Pacific Northwest National Laboratory (PNNL), Richland, WA (US), Environmental Molecular Sciences Laboratory (EMSL)
Sponsoring Org.:
USDOE
OSTI Identifier:
1059041
Report Number(s):
PNNL-SA-86840
23593; 830403000
DOE Contract Number:  
AC05-76RL01830
Resource Type:
Journal Article
Journal Name:
Vadose Zone Journal, 11(4)
Additional Journal Information:
Journal Name: Vadose Zone Journal, 11(4)
Country of Publication:
United States
Language:
English
Subject:
Vadose Zone; Uranium; Gas Treatment; Environmental Molecular Sciences Laboratory

Citation Formats

Szecsody, James E., Truex, Michael J., Zhong, Lirong, Johnson, Timothy C., Qafoku, Nikolla, Williams, Mark D., Greenwood, William J., Wallin, Erin L., Bargar, John R., and Faurie, Danielle K. Geochemical and Geophysical Changes during Ammonia Gas Treatment of Vadose Zone Sediments for Uranium Remediation. United States: N. p., 2012. Web. doi:10.2136/vzj2011.0158.
Szecsody, James E., Truex, Michael J., Zhong, Lirong, Johnson, Timothy C., Qafoku, Nikolla, Williams, Mark D., Greenwood, William J., Wallin, Erin L., Bargar, John R., & Faurie, Danielle K. Geochemical and Geophysical Changes during Ammonia Gas Treatment of Vadose Zone Sediments for Uranium Remediation. United States. doi:10.2136/vzj2011.0158.
Szecsody, James E., Truex, Michael J., Zhong, Lirong, Johnson, Timothy C., Qafoku, Nikolla, Williams, Mark D., Greenwood, William J., Wallin, Erin L., Bargar, John R., and Faurie, Danielle K. Tue . "Geochemical and Geophysical Changes during Ammonia Gas Treatment of Vadose Zone Sediments for Uranium Remediation". United States. doi:10.2136/vzj2011.0158.
@article{osti_1059041,
title = {Geochemical and Geophysical Changes during Ammonia Gas Treatment of Vadose Zone Sediments for Uranium Remediation},
author = {Szecsody, James E. and Truex, Michael J. and Zhong, Lirong and Johnson, Timothy C. and Qafoku, Nikolla and Williams, Mark D. and Greenwood, William J. and Wallin, Erin L. and Bargar, John R. and Faurie, Danielle K.},
abstractNote = {NH3 gas treatment of low water content sediments resulted in a significant decrease in aqueous and adsorbed uranium, which is attributed to incorporation into precipitates. Uranium associated with carbonates showed little change. Uranium associated with hydrous silicates such as Na-boltwoodite showed a significant decrease in mobility but no change in Na-boltwoodite concentration (by EXAFS/XANES), so is most likely caused by non-U precipitate coatings. Complex resistivity changes occurred in the sediment during NH3 and subsequent N2 gas injection, indicating ERT/IP could be used at field scale for injection monitoring.},
doi = {10.2136/vzj2011.0158},
journal = {Vadose Zone Journal, 11(4)},
number = ,
volume = ,
place = {United States},
year = {2012},
month = {10}
}