An asymmetric system containing a first conductive polymer modified with a redox active moiety and a second conductive polymer modified with a surfactant is used for the separation of organic compounds from aqueous solutions. The asymmetric system has complementary hydrophobicity tunability in response to electrochemical modulations. For example, both materials are hydrophobic in their respective neutral states, therefore exhibiting affinity toward organic compounds. Application of a mild potential drives the desorption of the organic compounds and regeneration of the materials. The asymmetric system can be used in a cyclic fashion, through repeated electrical discharge or shorting of the two electrodes to program the capture of organics from a feed solution, and application of a potential to stimulate the release of the adsorbed organics.

Methods and systems are provided for processing PFAS-contaminated waste via thermomechanochemical (TMC) processing. In one example, a system may include a TMC processing chamber including a milling system and coupled to a heating system, the heating system configured to co-operate with the milling system to process the waste material. A plurality of containers including the waste material in one or more of a liquid-solid state, a semi-wet or slurry solid state, and a dry solid state are coupled to the TMC chamber.

An apparatus and method for filtering a fluid is provided. The apparatus includes a filtration unit having an inlet and hollow fiber membranes. The hollow fiber membranes are each formed from an elongated tube having an exterior surface and an interior surface. The hollow fiber membranes are configured to separate the filtration unit into a permeate side that allows permeate to exit the filtration unit through a permeate outlet and a retentate side that allows retentate to exit the filtration unit through a retentate outlet. The hollow fiber membranes include a coating linked to the exterior surface or interior surface of the hollow fiber membranes. The coating includes a poly electrolyte electrostatically coupled to the charged exterior surface or the charged interior surface.

Methods of treating a water sample containing both free fluoride and fluorinated organic compounds are described. The methods are effective at removing high amounts of the free fluoride while retaining high amounts of the fluorinated organic compounds. The methods include combining the water sample with a hexaalkyldisiloxane, a strong acid and a compatibilizing solvent; reacting the free fluoride with the disiloxane; and removing the fluorinated reaction product.

Materials for binding per- and polyfluoroalkyl substances (PFAS) are disclosed. A fluidic device comprising the materials for detection and quantification of PFAS in a sample is disclosed. The fluidic device may be configured for multiplexed analyses. Also disclosed are methods for sorbing and remediating PFAS in a sample. The sample may be groundwater containing, or suspected of containing, one or more PFAS.

The invention is directed to a system and method of reducing, reacting, and/or removing an oxidant or unwanted chemical species from a chemical stream. Particularly, the system and method include the use of one or more reductants that react with the undesired chemical species. The reductant and the chemical stream are added to a reactor and allowed to react for a desired amount of time. The reductant will reduce, react with, and/or remove the chemical species from the stream. The excess reductant and reaction products are then removed from the reactor, as described in more detail herein below.

A method of sorbing a PFAS compound from a contaminated environment can include admixing a modified clay sorbent with the environment. The modified clay can include a clay intercalated with a blend of mono-quaternary amine compound and di-quaternary amine compound.

A method of waste treatment includes treating partially-dewatered matrix with a first electron-beam radiation dose. The treated partially-dewatered matrix is transferred to a digester where the treated partially-dewatered matrix is subjected to anaerobic digestion. Biogas is recovered from the treated partially-dewatered matrix during the anaerobic digestion. The treated partially-dewatered matrix is dried and subjected to a second electron-beam radiation dose.

Methods for removing contaminants from aqueous media using polyelectrolyte complexes having a heterogeneous charge distribution are provided. The polyelectrolyte complexes are formed from an amphiphilic anionic random copolymer and a cationic random copolymer are provided. The polyelectrolyte complexes absorb cationic, anionic, or hydrophobic organic molecules and can be easily removed from water.

A ground water contamination remediation process includes the steps of identifying a source and location of land-based ground water contamination and excavating the soil above and within the location of the contamination to create a void. The width and depth of the void is increased to a predetermined size until the contaminated ground water is exposed creating a man-made treatment lake by allowing the contaminated ground water to partially fill the void. In one embodiment, the water in the treatment lake is aerated to reduce the amounts of hydrogen sulfide, methane, and biodegradable compounds in the contaminated water. In another embodiment, an adsorbent material is added to the treatment lake so to isolate per- and poly-fluoroalkyl substances (PFAS). The adsorbent material is applied to or mixed into PFAS contaminated water, PFAS is adsorbed, and the solid adsorbent materials settle to the bottom of the lake for subsequent management or removal.