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

Journal Article · · Ground Water
DOI: https://doi.org/10.1111/gwat.12770 · OSTI ID:1435399
 [1];  [2];  [3];  [4];  [2];  [5];  [6];  [6];  [7]
  1. Department of Earth and Planetary Sciences University of Tennessee Knoxville TN, Biosciences Division Oak Ridge National Laboratory Oak Ridge TN
  2. Department of Civil and Environmental Engineering University of Tennessee Knoxville TN
  3. Environmental Genomics and Systems Biology Division Lawrence Berkeley National Laboratory Berkeley CA
  4. Environmental Genomics and Systems Biology Division Lawrence Berkeley National Laboratory Berkeley CA, Department of Bioengineering University of California Berkeley CA
  5. School of Civil and Construction Engineering Oregon State University Corvallis OR
  6. Department of Earth and Planetary Sciences University of Tennessee Knoxville TN
  7. Biosciences Division Oak Ridge National Laboratory Oak Ridge TN, Department of Civil and Environmental Engineering University of Tennessee Knoxville TN, Department of Microbiology University of Tennessee Knoxville TN, Center for Environmental Biotechnology University of Tennessee Knoxville TN, Institute for a Secure and Sustainable Environment University of Tennessee Knoxville TN
+ Show Author Affiliations

Abstract 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.

Sponsoring Organization:
USDOE
OSTI ID:
1435399
Journal Information:
Ground Water, Journal Name: Ground Water Journal Issue: 2 Vol. 57; ISSN 0017-467X
Publisher:
Wiley-BlackwellCopyright Statement
Country of Publication:
United States
Language:
English

References (15)

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Simultaneous analyses and applications of multiple fluorobenzoate and halide tracers in hydrologic studies journal January 2005
Push-Pull Tests for Site Characterization book January 2013
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Ground-Water Tracers - A Short Review journal January 1980
Single-Well, "Push-Pull" Test for In Situ Determination of Microbial Activities journal July 1997
Simplified Method of "Push-Pull" Test Data Analysis for Determining In Situ Reaction Rate Coefficients journal March 1998
A Method to Infer In Situ Reaction Rates from Push-Pull Experiments journal July 1998
Importance of Exposure History When Using Single Well Push-Pull Tests to Quantify In Situ Ethanol Biodegradation Rates journal May 2011
A Method for Estimating In Situ Reaction Rates from Push-Pull Experiments for Arbitrary Solute Background Concentrations journal November 2007
Potential for Bioremediation of High Nitrate Irrigation Water Via Denitrification journal January 1994

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