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Title: Improved Method for Estimating Reaction Rates During Push-Pull Tests

The breakthrough curve obtained from a single-well push-pull test can be adjusted to account for dilution of the injection fluid in the aquifer fluid. The dilution-adjusted breakthrough curve can be analyzed to estimate the reaction rate of a solute. The conventional dilution-adjusted method assumes that the ratios of the concentrations of the nonreactive and reactive solutes in the injection fluid vs. the aquifer fluid are equal. If this assumption is invalid, the conventional method will generate inaccurate breakthrough curves and may lead to erroneous conclusions regarding the reactivity of a solute. In this study, a new method that generates a dilution-adjusted breakthrough curve was theoretically developed to account for any possible combination of nonreactive and reactive solute concentrations in the injection and aquifer fluids. The newly developed method was applied to a field-based data set and was shown to generate more accurate dilution-adjusted breakthrough curves. The improved dilution-adjusted method presented here is simple, makes no assumptions regarding the concentrations of the nonreactive and reactive solutes in the injection and aquifer fluids, and easily allows for estimating reaction rates during push-pull tests.
Authors:
 [1] ;  [2] ;  [3] ;  [4] ;  [2] ;  [5] ;  [6] ;  [6] ; ORCiD logo [7]
  1. Univ. of Tennessee, Knoxville, TN (United States). Department of Earth and Planetary Sciences; Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Biosciences Division
  2. Univ. of Tennessee, Knoxville, TN (United States). Department of Civil and Environmental Engineering
  3. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Environmental Genomics and Systems Biology Division
  4. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Environmental Genomics and Systems Biology Division; Univ. of California, Berkeley, CA (United States). Department of Bioengineering
  5. Oregon State Univ., Corvallis, OR (United States). School of Civil and Construction Engineering
  6. Univ. of Tennessee, Knoxville, TN (United States). Department of Earth and Planetary Sciences
  7. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Biosciences Division; Univ. of Tennessee, Knoxville, TN (United States). Department of Civil and Environmental Engineering, Department of Microbiology, Center for Environmental Biotechnology, and Institute for a Secure and Sustainable Environment
Publication Date:
Grant/Contract Number:
AC05-00OR22725; AC02-05CH11231
Type:
Published Article
Journal Name:
Ground Water
Additional Journal Information:
Journal Name: Ground Water; Journal ID: ISSN 0017-467X
Publisher:
Wiley - NGWA
Research Org:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org:
USDOE Office of Science (SC), Biological and Environmental Research (BER) (SC-23)
Country of Publication:
United States
Language:
English
Subject:
58 GEOSCIENCES; 54 ENVIRONMENTAL SCIENCES
OSTI Identifier:
1435399
Alternate Identifier(s):
OSTI ID: 1435400; OSTI ID: 1471861

Paradis, Charles J., Dixon, Emma R., Lui, Lauren M., Arkin, Adam P., Parker, Jack C., Istok, Jonathan D., Perfect, Edmund, McKay, Larry D., and Hazen, Terry C.. Improved Method for Estimating Reaction Rates During Push-Pull Tests. United States: N. p., Web. doi:10.1111/gwat.12770.
Paradis, Charles J., Dixon, Emma R., Lui, Lauren M., Arkin, Adam P., Parker, Jack C., Istok, Jonathan D., Perfect, Edmund, McKay, Larry D., & Hazen, Terry C.. Improved Method for Estimating Reaction Rates During Push-Pull Tests. United States. doi:10.1111/gwat.12770.
Paradis, Charles J., Dixon, Emma R., Lui, Lauren M., Arkin, Adam P., Parker, Jack C., Istok, Jonathan D., Perfect, Edmund, McKay, Larry D., and Hazen, Terry C.. 2018. "Improved Method for Estimating Reaction Rates During Push-Pull Tests". United States. doi:10.1111/gwat.12770.
@article{osti_1435399,
title = {Improved Method for Estimating Reaction Rates During Push-Pull Tests},
author = {Paradis, Charles J. and Dixon, Emma R. and Lui, Lauren M. and Arkin, Adam P. and Parker, Jack C. and Istok, Jonathan D. and Perfect, Edmund and McKay, Larry D. and Hazen, Terry C.},
abstractNote = {The breakthrough curve obtained from a single-well push-pull test can be adjusted to account for dilution of the injection fluid in the aquifer fluid. The dilution-adjusted breakthrough curve can be analyzed to estimate the reaction rate of a solute. The conventional dilution-adjusted method assumes that the ratios of the concentrations of the nonreactive and reactive solutes in the injection fluid vs. the aquifer fluid are equal. If this assumption is invalid, the conventional method will generate inaccurate breakthrough curves and may lead to erroneous conclusions regarding the reactivity of a solute. In this study, a new method that generates a dilution-adjusted breakthrough curve was theoretically developed to account for any possible combination of nonreactive and reactive solute concentrations in the injection and aquifer fluids. The newly developed method was applied to a field-based data set and was shown to generate more accurate dilution-adjusted breakthrough curves. The improved dilution-adjusted method presented here is simple, makes no assumptions regarding the concentrations of the nonreactive and reactive solutes in the injection and aquifer fluids, and easily allows for estimating reaction rates during push-pull tests.},
doi = {10.1111/gwat.12770},
journal = {Ground Water},
number = ,
volume = ,
place = {United States},
year = {2018},
month = {4}
}