Process and apparatus are disclosed for capturing and converting an ozone-depleting alkyl halide fumigant from a fumigant/air mixed stream (14) by absorbing it into a metal hydroxide-alcohol buffer solution (26) in an absorber/scrubber (12) to produce a fumigant-free air stream. The captured alkyl halide in aqueous alcohol solution can actively react with the metal hydroxide in alcohol solution to produce a value-added product, such as a precipitate metal halide, and another alcohol that further enhances absorption. The absorbing solution is well-mixed with make-up alcohol and alkali streams to maintain the concentration of the metal hydroxide in the desired buffer solution range. The solid precipitate metal halide is separated from the liquid stream, and the metal hydroxide-containing mixed alcohol stream is recycled to the absorber/scrubber (12).

Process and apparatus are disclosed for capturing and converting an ozone-depleting alkyl halide fumigant from a fumigant/air mixed stream (14) by absorbing it into a metal hydroxide-alcohol buffer solution (26) in an absorber/scrubber (12) to produce a fumigant-free air stream. The captured alkyl halide in aqueous alcohol solution can actively react with the metal hydroxide in alcohol solution to produce a value-added product, such as a precipitate metal halide, and another alcohol that further enhances absorption. The absorbing solution is well-mixed with make-up alcohol and alkali streams to maintain the concentration of the metal hydroxide in the desired buffer solution range. The solid precipitate metal halide is separated from the liquid stream, and the metal hydroxide-containing mixed alcohol stream is recycled to the absorber/scrubber (12).

[SUMMARY]

[OBJECT] To provide a per- and polyfluoroalkyl compound-adsorbing activated carbon having a high collection rate of per- and polyfluoroalkyl compounds in an atmospheric sample, and a filter body using the same.

[ACHIEVING MEANS] A per- and polyfluoroalkyl compound-adsorbing activated carbon for desorbably adsorbing per- and polyfluoroalkyl compounds in an atmospheric sample, the activated carbon including an activated carbon adsorbent having a BET specific surface area of 900 m.sup.2/g or more, a sum (V.sub.mic) of a volume of micropores of 1 nm or less of 0.35 cm.sup.3/g or more, a sum (V.sub.met) of a volume of mesopores of 2 to 60 nm of 0.02 cm.sup.3/g or more, a volume difference (V.sub.s) between the micropore volume (V.sub.mic) and the mesopore volume (V.sub.met) of 0.45 or more, and a surface oxide amount of 0.10 meq/g or more.

[SUMMARY]

[OBJECT] To provide a per- and polyfluoroalkyl compound-adsorbing activated carbon having a high collection rate of per- and polyfluoroalkyl compounds in an atmospheric sample, and a filter body using the same.

[ACHIEVING MEANS] A per- and polyfluoroalkyl compound-adsorbing activated carbon for desorbably adsorbing per- and polyfluoroalkyl compounds in an atmospheric sample, the activated carbon including an activated carbon adsorbent having a BET specific surface area of 900 m.sup.2/g or more, a sum (V.sub.mic) of a volume of micropores of 1 nm or less of 0.35 cm.sup.3/g or more, a sum (V.sub.met) of a volume of mesopores of 2 to 60 nm of 0.02 cm.sup.3/g or more, a volume difference (V.sub.s) between the micropore volume (V.sub.mic) and the mesopore volume (V.sub.met) of 0.45 or more, and a surface oxide amount of 0.10 meq/g or more.

Novel radioactive iodide molecular traps, in which one or more metal atoms are functionalized by coordinating to an amine containing two or more nitrogens, and methods of using the molecular traps to capture radioactive iodide.

Novel radioactive iodide molecular traps, in which one or more metal atoms are functionalized by coordinating to an amine containing two or more nitrogens, and methods of using the molecular traps to capture radioactive iodide.

Methods for purification of a fluorocarbon or hydrofluorocarbon containing at least one undesired halocarbon impurities comprise flowing the fluorocarbon or hydrofluorocarbon through at least one adsorbent beds to selectively adsorb the at least one undesired halocarbon impurities through physical adsorption and/or chemical adsorption, wherein the at least one adsorbent beds contain a metal oxide supported on an adsorbent in an inert atmosphere.

A genetically modified houseplant capable of reducing levels of volatile organic carcinogenic compounds, such as formaldehyde, benzene, and chloroform, in the indoor air in urban homes of developed countries is disclosed. The plant expresses a detoxifying transgene, mammalian cytochrome P450 2e, and has shown sufficient detoxifying activity against benzene and chloroform. Air purifying biofilters utilizing the plants and methods of their use are also disclosed.

A genetically modified houseplant capable of reducing levels of volatile organic carcinogenic compounds, such as formaldehyde, benzene, and chloroform, in the indoor air in urban homes of developed countries is disclosed. The plant expresses a detoxifying transgene, mammalian cytochrome P450 2e, and has shown sufficient detoxifying activity against benzene and chloroform. Air purifying biofilters utilizing the plants and methods of their use are also disclosed.

Materials and methods for mitigating the effects of halide species contained in process streams are provided. A halide-containing process stream can be contacted with mitigation materials comprising active metal oxides and a non-acidic high surface area carrier combined with a solid, porous substrate. The halide species in the process stream can be reacted with the mitigation material to produce neutralized halide salts and a process stream that is essentially halide-free. The neutralized salts can be attracted and retained on the solid, porous substrate.