Modeling nonlinearly transient zero-order bioreduction and transport of Cr(VI) in groundwater |
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Authors: | Email author" target="_blank">Akram?HossainEmail author |
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Institution: | (1) Civil and Environmental Engineering, Washington State University, Richland, WA 99354, USA |
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Abstract: | Cr(VI) contamination of soil and groundwater is considered a major environmental concern. Bioreduction of Cr(VI) to Cr(III)
can be considered a potentially effective technology in remediating Cr(VI) contaminated sites. Shewanella oneidensis MR-1 (MR-1) is one of the bacteria capable of reducing Cr(VI) to Cr(III) under anaerobic conditions. The kinetics of Cr(VI)
reduction by MR-1 is defined by the dual-enzyme kinetic model which is nonlinear, transient, and zero-order. Existing transport
models are not designed to simulate such reaction kinetics. The objective of this paper is to present a Petrov–Galerkin finite
element model (PGFEM) to simulate transport and bioreduction of Cr(VI), by MR-1, in groundwater. The model developed is unconditionally
stable and provides oscillation free accurate results for a wide range of Peclet number (Pn) and Courant number (Cn). |
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Keywords: | Cr(VI) reduction dual-enzyme kinetic model |
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