A device and method for passive collection of atmospheric CO2 is disclosed. The device includes a chamber having an inner wall, an outer wall. an annular void between the inner and outer walls. and a sump connecting the annular void and an inner cylinder. The device also includes a capture structure having a sorbent material and movable between open and closed configurations. The device includes a water delivery device with a pump and a water applicator positioned within the annular void to dispense water onto the outer wall. The pump transfers water from the sump to the applicator. The open configuration includes the sorbent exposed and allowed to capture CO2. The closed configuration includes the capture structure being enclosed inside the chamber such that a heated water vapor releases captured CO2. The vapor is created by the solar heating of the outer wall and the water dispensed within.

A device and method for passive collection of atmospheric CO2 is disclosed. The device includes a chamber having an inner wall, an outer wall. an annular void between the inner and outer walls. and a sump connecting the annular void and an inner cylinder. The device also includes a capture structure having a sorbent material and movable between open and closed configurations. The device includes a water delivery device with a pump and a water applicator positioned within the annular void to dispense water onto the outer wall. The pump transfers water from the sump to the applicator. The open configuration includes the sorbent exposed and allowed to capture CO2. The closed configuration includes the capture structure being enclosed inside the chamber such that a heated water vapor releases captured CO2. The vapor is created by the solar heating of the outer wall and the water dispensed within.

Processes and apparatuses for degrading PFAS into calcium fluoride, carbon dioxide, and water. PFAS are heated and introduced to a calcium base which will degrade the PFAS. The PFAS may be in a stream that is a PFAS enriched stream formed by desorbing the PFAS from an adsorbent which removed the PFAS from a contaminant stream. The PFAS may be desorbed in the presence of the calcium base. The calcium base may be calcium hydroxide, calcium oxide, calcium carbonate, or combinations thereof.

Processes and apparatuses for degrading PFAS into calcium fluoride, carbon dioxide, and water. PFAS are heated and introduced to a calcium base which will degrade the PFAS. The PFAS may be in a stream that is a PFAS enriched stream formed by desorbing the PFAS from an adsorbent which removed the PFAS from a contaminant stream. The PFAS may be desorbed in the presence of the calcium base. The calcium base may be calcium hydroxide, calcium oxide, calcium carbonate, or combinations thereof.