Apparatus and methods for removal, measurement, and mapping of per- and polyfluoroalkyl substances
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United States of America Patent
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Nov 1, 2022
Grant Date -
Sep 29, 2022
app pub date -
Mar 25, 2021
filing date -
Mar 25, 2021
priority date (Note) -
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Abstract
Apparatus and methods for removing, measuring, and/or mapping per- and polyfluoroalkyl substances (PFAS) present in porous media such as soils, sludges, and colloids by employing both direct and indirect heating methods to transfer thermal energy to the media undergoing treatment. The contaminated media is placed within a media treatment enclosure that incorporates a thermal jacket, and radiatively heated by circulating a heated gas through the thermal jacket. The contaminated media is directly heated by injecting heated treatment gas into the media treatment enclosure. The heated treatment gas is drawn over and/or through the contaminated media to mobilize contaminants from the media and into the treatment gas, which is then collected and processed to recover the contaminant.
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