The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 16, 2024
Filed:
Oct. 10, 2020
Cody M. Flood, Oberlin, OH (US);
Chad A. Coolidge, Vermilion, OH (US);
Jason M. Belitsky, Oberlin, OH (US);
Dennis M. Flood, Oberlin, OH (US);
Dennis J. Flood, Oberlin, OH (US);
Cody M. Flood, Oberlin, OH (US);
Chad A. Coolidge, Vermilion, OH (US);
Jason M. Belitsky, Oberlin, OH (US);
Dennis M. Flood, Oberlin, OH (US);
Dennis J. Flood, Oberlin, OH (US);
CoreWater Technologies, Inc., Oberlin, OH (US);
Abstract
A specially functionalized composite filter material with a high specific surface area is used to adsorb PFAs from potable water. In a preferred embodiment, the base filter material is granular activated carbon (GAC), which is sequentially coated with a thin layer of polydopamine, a thin layer of partially oxidized iron, and a thin coating of octadecylamine. After PFAs are adsorbed onto the coated GAC particles, the PFAs are removed by a rinsing process, and remain in the rinse effluent. GAC particles are recovered and recoated as needed to restore their adsorptive capacity. The PFA-containing effluent is treated using photochemical processes to destroy the PFA molecules. The now PFA-free effluent can be disposed of as a non-hazardous material. The composite filter material works in systems ranging from small passive systems for personal use to large scale, high-flow-rate utility water treatment systems.