Battelle Memorial Institute

Revive Environmental Technology, LLC

Franco Pala

Kavitha Dasu

Chad M Cucksey

Eliza M Kaltenberg

Ramona Darlington Iery

Bradley Westlake

Dinusha Siriwardena

Fred Griesemer

George Nanes

Ryan R James

The invention provides methods for regenerating activated carbon that have been used in absorbing per- and polyfluoroalkyl substances (PFAS) in aqueous solution. In these methods, the activated carbon is treated with a solution of base in alcohol, which has been found to impart superior properties to the activated carbon.

Systems and methods of regenerating activated carbon

A method of determining total organofluorine in a sample comprising PFAS, comprising: providing a solution of PFAS in an organic solvent to obtain extracted PFAS, or extracting a sample with an organic solvent to obtain extracted PFAS; treating the extracted PFAS with a sodium metal dispersion and alcohol to obtain sodium fluoride; and quantifying the amount of the fluoride. Surprisingly, we discovered that the method recovered substantial fluorine from PFAS and significantly higher yields obtained by selection of the appropriate alcohols. The method is selective for organofluorine from inorganic fluorine.

Total organofluorine method for PFAS using reductive defluorination

Methods of passively sampling PFAS in the environment, PFAS sorbents, apparatus and systems (apparatus plus conditions) for sampling groundwater, porewater, and surface water are described.

Sampling for monitoring per- and polyfluoroalkyl substances (PFAS) in surface water, groundwater and pore water

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Rockland, MA, United States of America

Franco Pala