Patent 12024442 was granted and assigned to Evoqua Water Technologies on July, 2024 by the United States Patent and Trademark Office.
Modified activated carbon is disclosed for use in water treatment. In at least some embodiments, activated carbon may be treated with a positively-charged surfactant, i.e. a quaternary ammonium-based surfactant, to promote the removal of poly- and perfluorolkyl substances from water.