Electrokinetic Delivery of Reactants: Pore Water Chemistry Controls Transport, Mixing, and Degradation

Abstract

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Surface complexation reactions in sandy porous media: Effects of incomplete mixing and mass-transfer limitations in flow-through systems

“…The investigations performed in this study could also be extended to multidimensional 2-D and 3-D systems where incomplete mixing is particularly important at the lateral fringes of injected plumes (Ye et al, 2015a;Chiogna et al, 2010;Muniruzzaman and Rolle, 2015;Rolle et al, 2018;Sprocati et al, 2021;Cogorno et al, 2021). Furthermore, in multidimensional domains, it will be of interest to explore the role of physical (e.g., Bolster et al, 2011;Heidari and Li, 2014;Chiogna et al, 2014;Ye et al, 2015b;Jung and Navarre-Sitchler, 2018b;Lee et al, 2018); chemical (e.g., Li et al, 2010;Salehikhoo et al, 2013;Fakhreddine et al, 2016;Wen and Li, 2018;Bretzler et al, 2019;Battistel et al, 2021) and electrostatic heterogeneity (e.g., Muniruzzaman and Rolle, 2019) and their impact on reactive transport controlled by surface complexation reactions under different flow regimes.…”

Integrating Process‐Based Reactive Transport Modeling and Machine Learning for Electrokinetic Remediation of Contaminated Groundwater

“…The concentration of lactate is lower in the right part of the domain due to its consumption as electron donor during reductive dehalogenation carried out by both indigenous and bioaugmented microorganisms. Moreover, the concentration of lactate in the domain (around 10 mM) is lower than the injection concentration (18 mM) as a result of charge interactions, which limit the maximum concentration of charged reactants that can be transported in the domain by electromigration (Sprocati et al., 2021; Sprocati & Rolle, 2020).…”

Oxidative Dissolution of Arsenic-Bearing Sulfide Minerals in Groundwater: Impact of Hydrochemical and Hydrodynamic Conditions on Arsenic Release and Surface Evolution

“…The reactive transport model was implemented in the geochemical code PHREEQC-3 coupled with Matlab by using the IPhreeqc module . Such coupling allowed combining the capabilities of PHREEQC to model solute transport, as well as kinetic and equilibrium reactions, with the automatic calibration and data analysis capabilities of Matlab. − The thermodynamic database WATEQ4f, amended with the aqueous speciation reactions of arsenic from Dixit and Hering, was used to calculate the aqueous speciation and reactions. A single set of kinetic model parameters describing the mineral transformation and capable of reproducing the experimental data set under the various tested hydrochemical conditions and spatial configurations was calibrated through parallelization of the simulations of columns 1–4.…”