In certain embodiments, the present invention is directed to a process for decontaminating water to remove per- and polyfluoroalkyl substances (PFAS), the process comprising passing contaminated water through a filter comprising at least one filtering element, wherein the filtering element comprises organic fibers; wherein the decontaminated water has a PFAS level of less than 70 ppt.

The present invention relates to aluminium-doped chelate resins containing iminoacetic acid groups, to a production process for aluminium-doped chelate resins containing iminoacetic acid groups, and to a device comprising at least one layer of at least one aluminium-doped chelate resin containing iminoacetic acid groups, and to the uses of this device and of the chelate resins for removal of fluoride from water.

A PFAS detoxification system 1 includes a concentrating device 11 configured to concentrate a resist waste liquid containing PFAS discharged from a lithography apparatus 111 of a semiconductor manufacturing apparatus 100. Further, the PFAS detoxification system 1 includes a sulfuric acid processing tub 12 configured to decompose and volatilize a concentrate concentrated by the concentrating device 11.

Water-filtering compositions including a geopolymer and a sequestration agent are provided herein. Filters including the compositions are further provided. Water filtration systems including the filters are further provided. Processes for the preparation of the compositions are further provided. Methods of reducing an amount of a chemical species from a body of water are further provided. Chemical species that are reduced include neutral or ionic heavy metal species or polyfluorinated chemical species.

The present disclosure relates to a polyindole-montmorillonite (Pind-mmt) complex and a preparation method and application thereof. The preparation method includes the following steps: subjecting mmt to cation saturation using ferric chloride, to prepare ferric ion-exchanged montmorillonite (Fe.sup.3+-mmt); and formulating an indole aqueous solution; adding Fe.sup.3+-mmt to the indole aqueous solution to enable indole molecules to generate Pind at mmt interlayer by in-situ polymerization, and obtaining a Pind-mmt complex body; and subjecting the Pind-mmt complex body to organic modification with quaternary ammonium salt cationic surfactant to obtain the Pind-mmt complex. The present disclosure discloses a method for generating two-dimensional Pind at mmt interlayer by in-situ polymerization and further discloses a method for using Pind-mmt to efficiently and stably generate hydrated electrons to degrade perfluoroalkyl substances (PFASs) without being affected by dissolved oxygen and pH of water, which is of great significance for coping with PFAS environmental pollution.

A PFA removal system includes a torch reaction zone and an organic compound stream, the organic compound stream injected into the torch reaction zone. The PFA removal system also includes a hydrogen stream, the hydrogen stream injected into the torch reaction zone and an oxygen stream, the oxygen stream injected into the torch reaction zone. In addition, the PFA removal system includes a hot waste stream injected into the torch reaction zone and a flue gas stream, the flue gas stream discharged from the torch reaction zone.

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.

Described herein are systems and methods for removing halogenated compounds from a contaminated source. These removal systems and methods include concentrating and removing halogenated compounds using select alkaline earth metal oxides, as well as acidifying and removing halogenated compounds using select acids.

In certain embodiments, the present invention is directed to a process for decontaminating water to remove per- and polyfluoroalkyl substances (PFAS), the process comprising passing contaminated water through a filter comprising at least one filtering element, wherein the filtering element comprises organic fibers; wherein the decontaminated water has a PFAS level of less than 70 ppt.

Per-and polyfluoroalkyl substances (PFAS) are destroyed by oxidation in supercritical conditions. PFAS in water can be concentrated and prepared for destruction in a pretreatment phase. Following annihilation of the PFAS in supercritical conditions to levels below 5 parts per trillion (ppt), the water effluent can be used to recover heat, returned to sub-critical conditions, and then released back into the environment.