Abstract: A method for using foam fractionation to remove a PFAS contaminant from a water source is disclosed herein. The method includes providing a feed stream to an inlet of an active column. The method also includes introducing the feed stream into an interior of the active column. The method also includes flowing gas through an active column into the interior of the active column. The method also include rising gas through the feed stream in the interior of the active column to form gas bubbles in the feed stream. The method also includes forming a foam layer. The method also includes, in instances where insufficient foam is generated due to depletion of surfactant in the earlier columns, adding additional surfactant through ports located in various columns throughout the system to ensure the presence of sufficient surfactant in all columns and optimize the volume of foam produced in each stage.

Abstract: A system for the destruction of PFAS compounds through mineralization with reactive oxides is disclosed herein. The system includes an acquisition unit for obtaining reactive oxides. The system also includes a mixing unit operatively connected to the acquisition unit, where the mixing unit is configured to combine PFAS-contaminated waste with the reactive oxides. The system also includes a high-temperature treatment unit operatively connected to the mixing unit to subject the mixture of PFAS-contaminated waste and reactive oxides to a chemical reaction. The system includes a cooling unit operatively connected to the high-temperature treatment unit. The system includes a waste collection receptacle connected to the cooling unit. The system includes particulate vapor treatment systems, where PFAS-contaminated atmospheres from the high-temperature treatment unit and the cooling unit are captured to prevent emissions to the environment.

Abstract: A method for using foam fractionation to remove a PFAS contaminant from a water source is disclosed herein. The method includes providing a feed stream to an inlet of an active column, where the feed stream comprises the PFAS contaminant and water; introducing the feed stream into an interior of the active column; flowing gas through an active column into the interior of the active column; rising gas through the feed stream in the interior of the active column to form gas bubbles in the feed stream; forming a foam layer; passing the purified stream into a next column; continuously perform foam fractionation until the feed stream becomes a cleaned stream; collecting the foam layer; and disposing of the foam layer.

Abstract: A method and system for the destruction of PFAS compounds using reactive metal oxides is disclosed herein. The method includes introducing a metal oxide into a vessel, where the vessel is heated to a temperature in a range of approximately 300° C. to approximately 700° C. The method also includes introducing a contaminated stream to the vessel, where the contaminated stream includes one or more PFAS compound. The method also includes reacting the contaminated stream with the metal oxide. The method also includes, resultant to the reacting, producing a solid non-toxic product.

Abstract: A system and method for foam fractionation with gas recycling is disclosed herein. The method includes using foam fractionation to remove a contaminant from an aqueous source. The method includes providing a feed stream to an inlet of an active column; introducing the feed stream into an interior of the active column; flowing gas through an active column into the interior of the active column; rising gas through the feed stream in the interior of the active column to form gas bubbles in the feed stream; forming a foam layer; extracting the foam layer; passing the foam layer through a liquid-gas separator to obtain a recycle gas stream; feeding the recycle gas stream to a recycling device; and re-introducing the recycle gas stream to the active column using the recycling device.

Abstract: A system for the separation of rare earth elements, the system including a separation vessel, the separation vessel including an inlet configured to receive the aqueous solution, an interior configured to house the aqueous solution, where the interior is configured to receive a supply of air; the aqueous solution including one or more rare earth elements, a surfactant, and a complexing agent; a compressed air source, where the compressed air source is operatively coupled to the separation vessel, and configured to propel the supply of air through the aqueous solution; and the supply of air, where the supply of air is operable to induce a plurality of bubbles to form in the aqueous solution, and create a foam layer to form at and above the interface of the aqueous solution, wherein the foam layer comprises the one or more rare earth elements from the aqueous solution.

Abstract: In an approach to efficient rare earth and critical material recovery from rare earth magnets, a process includes demagnetizing the rare earth magnets, breaking the rare earth magnets, leaching the rare earth magnets to extract rare earth element phosphates, and precipitating the rare earth magnets to extract rare earth element sulfates.