Coupling Electrokinetics to the Bioremediation of Organic Contaminants: Principles and Fundamental Interactions

Electro-assisted groundwater bioremediation: Fundamentals, challenges and future perspectives

“…The combination of bioremediation and electrochemical means appears to provide interesting synergy to significantly enhance the degradation (Wick, 2009). Lohner and Tiehm (2009) reported an accelerated bioreduction of perchloroethene (PCE) and further cathodic oxidation of the intermediates by utilizing the in-situ generated hydrogen and oxygen from water electrolysis, respectively.…”

“…1). Such enhancement of mass flux is independent of hydraulic conductivity (Jones et al, 2011), and hence is especially attractive for remediation of contaminated aquifer with fine-grained soils (i.e., with lm-level or smaller pores) (Wick, 2009). …”

Remediation of phthalates in river sediment by integrated enhanced bioremediation and electrokinetic process

“…In so doing, an improved transport of nutrients and terminal electron acceptors and increased bioavailability of contaminants were found (Wick, 2009). It has also been reported that EK can aid the release of organic contaminants bound to clay particles and organic matter in soils and sediments yielding an improved treatment performance (Maini et al, 2000;Luo et al, 2005a).…”

Simultaneous electrodialytic removal of PAH, PCB, TBT and heavy metals from sediments

“…Transport processes in the sediment under the influence of an electric field include electromigration (transport of ions in solution), electroosmosis (transport of fluid through pores), electrophoresis (transport of charged particles) and diffusion (Acar and Alshawabkeh, 1993). Ions are mainly transported by electromigration (Acar and Alshawabkeh, 1993), hydrophobic pollutants by electroosmosis (Gill et al, 2014;Lohner et al, 2009;Wick, 2009) while microorganisms may be transported via electroosmosis (if weakly charged) and/or electrophoresis (Wick, 2009). High removal efficiencies of heavy metals during EDR (90%) have been reported, in some cases achieving final concentrations equivalent to background levels (Nystroem et al, 2005a, b;Pedersen et al, 2015c;Pedersen et al, 2015e;Pedersen et al, 2015f).…”