Removal of per- and polyfluoroalkyl substances (pfas) from water with meso- and macro-porous gels
AssigneeThe University of Akron
InventorsSadhan Jana, Pratik Gotad
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Abstract
A polymer gel for removing undesired compounds from water includes polymer chains having an interconnected network of mesopores and macropores. The polymer gel has a relatively high surface and total porosity. The polymer gel is capable of producing a water product having less than 10 ng/L of per- and polyfluoroalkyl substances (PFAS). Corresponding methods and systems are also disclosed.
Claims25
A polymer gel for removing undesired compounds from water, the polymer gel comprising polymer chains having an interconnected network of mesopores and macropores therebetween, the mesopores having pore sizes between about 2 nm and 50 nm and the macropores having pore sizes greater than about 50 nm, wherein the polymer gel has a surface area of from about 200 m2/g to about 1,000 m2/g, and wherein the polymer gel has a total porosity of from about 90% to about 97%.
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A system for removal of per- and polyfluoroalkyl substances (PFAS) from water, the system comprising
- an inlet providing a PFAS-containing water stream;
- a polymer gel adapted to receive the PFAS-containing water stream via the inlet;
- an outlet adapted to output a product water stream having a lower concentration of PFAS than the PFAS-containing water stream;
- wherein the product water stream having the lower concentration of PFAS includes less than 10 ng/L of the PFAS.
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A method for removing per- and polyfluoroalkyl substances (PFAS) from water, the method comprising
- providing a PFAS-containing water stream to a polymer gel, the PFAS-containing water stream including PFAS at a concentration of from about 0.001 μg/L to about 1 μg/L;
- allowing the polymer gel to adsorb the PFAS within the PFAS-containing water stream;
- and
- collecting a product having a PFAS concentration of less than 1 ng/L.
Dependencies are inferred from the claim text.