Methods, systems, and techniques for removal of PFAS contaminants from contaminated soil or sediment are provided. Example embodiments provide a water-based ex-situ method and system at a site that utilizes particle size and particle density segregation; deagglomeration, attrition, and retention time and sequential contacts with purified water; a recirculating water system with continual water treatment, and additional modules for destructive treatment of concentrated PFAS. In an example embodiment, the water treatment system of an example PFAS contaminant removal system and process includes ion exchange resin filtration component to remove PFAS effectively.

Methods and systems for the purification of an aqueous solution comprising a photocatalyst employed as an anode and a cathode in communication with an electrolyte to achieve a current flow wherein a charge is applied between the cathode and the photocatalytic excited anode a corresponding increase in electron-hole pairs occurs.

Embodiments of the present disclosure relate generally to a method, apparatus and system for the destruction of hazardous material including Per- and Polyfluoroalkyl substances. The method, apparatus and system can include non-concentrated hazardous material or the concentration of the hazardous material into granular activated charcoal or other absorbents and a vacuum controlled loading system for a re-usable or non-reusable container to minimize leakage of the hazardous material into the atmosphere.

A system and method for removing and destroying PFAS from residual waste streams generated during the processing of landfill liquids prior to disposal are provided. The presently disclosed system and method can concentrate PFAS from landfill liquids into a residual waste stream so that the target compounds can be selectively removed for subsequent destruction.

A system for separating competing anions from per- and polyfluoroalkyl substances (PFAS) in a flow of water contaminated with PFAS and elevated levels of competing anions that includes a separation subsystem which receives the flow of water contaminated with PFAS and elevated levels of competing anions and separates competing anions from the PFAS and concentrates the PFAS to produce a treated flow of water having separated competing anions therein and a flow of water having a majority of PFAS therein. At least one anion exchange vessel having an anion exchange resin therein receives the flow of water having a majority of PFAS therein and removes PFAS from the water to produce a flow of treated water having a majority of the PFAS removed. The separation of competing anions by the separation subsystem increases the treatment capacity of the anion exchange resin to remove PFAS from the contaminated water.

A device for selectively removing a perfluorinated compound may include an adsorption electrooxidation tank including a reaction unit having a plurality of electrodes and granular activated carbon configured to oxidize and decompose a perfluorinated compound in raw water through adsorption and electrooxidation, a power supply device configured to supply power to the adsorption electrooxidation tank, and a head adjustment pipe unit configured to maintain a water level within the reaction unit at a height greater than or equal to a reaction height of the electrode.

An apparatus and methods to eliminate PFAS from wastewater biosolids through fluidized bed gasification. The gasifier decomposes the PFAS in the biosolids at temperatures of 900-1800° F. Synthesis gas (syngas) exits the gasifier which is coupled to a thermal oxidizer and is combusted at temperatures of 1600-2600° F. This decomposes PFAS in the syngas and creates flue gas. Heat can be recovered from the flue gas by cooling the flue gas to temperatures of 400-1200° F. in a heat exchanger that is coupled with the thermal oxidizer. Cooled flue gas is mixed with hydrated lime, enhancing PFAS decomposition, with the spent lime filtered from the cooled flue gas using a filter system that may incorporate catalyst impregnated filter elements. The apparatus and methods thereby eliminate PFAS from wastewater biosolids and control emissions in the resulting flue gas.

The present disclosure relates to a catalyst that removes an organic compound by using a metal oxide catalyst and a preparation method thereof and a method for degradation of an organic compound using the same. Particularly, the present disclosure relates to a copper-iron oxide (Cu—Fe.sub.2O.sub.3) catalyst composition that is prepared by following steps of: adding a mixed solution of an iron (Fe) precursor and a copper (Cu) precursor to a precipitator solution (S1); obtaining precipitates by heating a solution prepared in the step S1 (S2); obtaining a metal oxalate by filtering the precipitates obtained in the step S2 (S3); drying the metal oxalate obtained in the step S3 (S4); and obtaining a copper-iron oxide catalyst by calcinating the metal oxalate subjected to the step S4 (S5) and a method for removal of an organic compound using the same.

According to one embodiment, a method for removing antimicrobial material from a composition includes providing a container that contains a plurality of carbon elements such as granules, rocks and sheets. The carbon elements are submerged with a liquid and a composition that includes an antimicrobial material is deposited in the container. The carbon elements are configured to remove the antimicrobial material from the composition. The level of the liquid in the container is monitored and controlled to maintain a submerged condition of the carbon elements.

A method and enhancements for the decontamination of water containing one or more PFAS contaminants includes introducing a foaming agent into the water, and injecting a gas through a diffuser and into the water so as to form a plurality of bubbles in the water, the one or more PFAS contaminants accumulating on the plurality of bubbles. The plurality of bubbles is allowed to rise, forming a foam at the surface of the water. The resulting foam is then collected and transported away from the surface of the water, where it condenses into a liquid and is treated to regulatory standards.