System and methods for photoactivated reductive defluorination of pfas in a sample
AssigneeEnspired Solutions
InventorsDenise Kay, Meng Wang, Suzanne Witt
Life of this patent
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Abstract
Systems and methods are provided for degrading PFAS in a semi-solid sample. The semi-solid sample includes PFAS molecules in a partially liquid solution. An electron donor, and optionally a surfactant, are introduced into the mixture, forming micelles. An electron donor associates with the micelle surface and releases hydrated electrons upon exposure to UV light to initiate the reductive defluorination reaction, resulting in fluoride, water, and simple carbon compounds.
Claims20
A system for defluorinating per- and polyfluorinated substances (PFAS) in semi-solid slurries, comprising:
- a semi-solid slurry including liquid, solid, and PFAS;
- an electron donor;
- and
- an ultraviolet (UV) light source;
- wherein the electron donor is combined with the semi-solid slurry to form a mixture;
- and
- wherein the electron donor is capable of releasing hydrated electrons upon UV light irradiation from the UV light source.
A method for defluorinating per- and polyfluorinated substances (PFAS) in a semi-solid slurry, comprising:
- introducing an electron donor into the semi-solid slurry to form a mixture, the electron donor releasing hydrated electrons upon ultraviolet (UV) light irradiation;
- and
- irradiating the mixture with UV light with at least one UV light source designed to maximize light penetration within the mixture and enhance UV exposure of the mixture, wherein irradiating the mixture defluorinates the PFAS.
A system for defluorinating per- and polyfluorinated substances (PFAS) in semi-solid slurries, comprising:
- a semi-solid slurry including liquid, solid, and PFAS;
- an electron donor;
- a surfactant;
- and
- an ultraviolet (UV) light source;
- wherein the electron donor and the surfactant are combined with the semi-solid slurry to form a mixture;
- and
- wherein the electron donor is capable of releasing hydrated electrons upon UV light irradiation from the UV light source.
Dependencies are inferred from the claim text.