The invention provides a rapid leaching and dewatering system for the remediation of PFAS-contaminated solid matrix material (e.g., soil, sediment, and/or sludge material) for the removal of PFAS compounds, and other contaminants, therefrom. The system mobilizes contaminants from a solid state (soil/sediment/sludge) to a liquid state resulting in a clean solid material.

An ex situ electrokinetic system and method for decontaminating soils and other fine-textured media, including salt-contaminated soil, is disclosed. The system consists of a series of unit processes that continuously remove inorganic and organic contaminants yielding a final decontaminated product. The initial soil conditioning unit process produces a homogenous slurry saturated with a customised electrolyte. The next unit process uses electroosmosis and electromigration along with hydraulic pressure to move electrolyte and dissolved ions through the slurry. The contaminants are released into the electrolyte and are removed at the cathodes. The last unit process removes residual electrolyte and contaminants producing a final product suitable for land application or other uses.

An electrochemical oxidative method destroys recalcitrant contaminants in an aqueous solution. The aqueous solution is directed to an electrochemical reactor with an anode and a cathode. A pulsating voltage is delivered across the anode and cathode generating a pulsating current to decrease energy consumption urging the recalcitrant contaminants in the aqueous solution to contact the anode and breaking strong bonds of the recalcitrant contaminants when they contact the anode.

It discloses a method for emergency remediating halogenated organic polluted site(s), by constructing a microelectric field driven bioelectrochemical system of engineering bacteria and auxiliary agent(s). The micro-electric field has cast iron electrode or copper zinc biochar electrode as the anode and plastic electrode as the cathode. The copper zinc biochar is produced by enriching copper, zinc in situ in watercanna, and then pyrolysizing, efficient improving electron transfer capability. By staged replacement of electrodes, showering engineering bacteria and auxiliary agents onto site(s), the sintered iron-rich biochar, which enriches iron in an iris, mediates extracellular electron transport of engineering bacteria and promotes the process of reducing dehalogenation of persistent halogenated organic pollutants. The present invention is particularly pronounced for emergency remediation and treatment of halogenated organic pollutants at halogenated contaminated sites with removal rates of more than 95%.