J
John A. Christ
Researcher at United States Air Force Academy
Publications - 36
Citations - 1045
John A. Christ is an academic researcher from United States Air Force Academy. The author has contributed to research in topics: Reductive dechlorination & Dense non-aqueous phase liquid. The author has an hindex of 15, co-authored 36 publications receiving 977 citations. Previous affiliations of John A. Christ include University of Michigan & Oregon Health & Science University.
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Journal ArticleDOI
Effects of carbonate species on the kinetics of dechlorination of 1,1,1-trichloroethane by zero-valent iron.
Abinash Agrawal,William J. Ferguson,Bruce O. Gardner,John A. Christ,Joel Z. Bandstra,Paul G. Tratnyek +5 more
TL;DR: The kinetics of TCA reduction were first-order when C(IV)-enhanced corrosion predominated but showed mixed-order kinetics in experiments performed with passivated Fe0, and a Michaelis-Menten-type kinetic model was fit to a heuristic model assuming proportionality between changes in T CA reduction rate and changes in surface coverage with FeCO3.
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Coupling Aggressive Mass Removal with Microbial Reductive Dechlorination for Remediation of DNAPL Source Zones: A Review and Assessment
TL;DR: This article reviews available laboratory and field evidence that supports the development of a treatment strategy that combines aggressive source-zone removal technologies with subsequent promotion of sustained microbial reductive dechlorination and results suggest source longevity may be reduced by as much as an order of magnitude.
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Estimating mass discharge from dense nonaqueous phase liquid source zones using upscaled mass transfer coefficients: An evaluation using multiphase numerical simulations
TL;DR: In this article, the authors compare upscaled model predictions of flux-weighted downstream concentrations and source longevity to predictions derived from three-dimensional multiphase numerical simulation of tetrachloroethene (PCE)-NAPL dissolution for realizations of a statistically homogeneous, nonuniform aquifer.
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Experimental evaluation and mathematical modeling of microbially enhanced tetrachloroethene (PCE) dissolution.
TL;DR: Results suggest that microorganisms incapable of dechlorinating at high PCE concentrations can enhance the dissolution and transformation of PCE from free-phase DNAPL.
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Predicting DNAPL mass discharge from pool-dominated source zones.
TL;DR: Comparisons of model predictions with a series of three-dimensional source zone numerical simulations and data from two-dimensional aquifer cell experiments demonstrate the ability of the model to predict DNAPL dissolution from ganglia- and pool-dominated source zones for all levels of mass recovery.