WO2021033595A1 - ペル及びポリフルオロアルキル化合物吸着活性炭 - Google Patents
ペル及びポリフルオロアルキル化合物吸着活性炭 Download PDFInfo
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- WO2021033595A1 WO2021033595A1 PCT/JP2020/030575 JP2020030575W WO2021033595A1 WO 2021033595 A1 WO2021033595 A1 WO 2021033595A1 JP 2020030575 W JP2020030575 W JP 2020030575W WO 2021033595 A1 WO2021033595 A1 WO 2021033595A1
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- Prior art keywords
- activated carbon
- pel
- polyfluoroalkyl
- prototype
- compound
- Prior art date
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 316
- 150000001875 compounds Chemical class 0.000 claims abstract description 83
- 238000001179 sorption measurement Methods 0.000 claims description 48
- 239000003463 adsorbent Substances 0.000 claims description 24
- 239000011358 absorbing material Substances 0.000 abstract 1
- 239000011148 porous material Substances 0.000 description 55
- 239000000126 substance Substances 0.000 description 38
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 30
- JJUBFBTUBACDHW-UHFFFAOYSA-N 3,3,4,4,5,5,6,6,7,7,8,8,9,9,10,10,10-heptadecafluoro-1-decanol Chemical group OCCC(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)F JJUBFBTUBACDHW-UHFFFAOYSA-N 0.000 description 21
- 238000000034 method Methods 0.000 description 16
- 238000005259 measurement Methods 0.000 description 13
- 239000000835 fiber Substances 0.000 description 10
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 9
- 238000011084 recovery Methods 0.000 description 9
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 8
- 239000002994 raw material Substances 0.000 description 8
- 239000013076 target substance Substances 0.000 description 8
- 230000002378 acidificating effect Effects 0.000 description 7
- 125000000524 functional group Chemical group 0.000 description 7
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 description 6
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 6
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 6
- 229920005830 Polyurethane Foam Polymers 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- 239000011496 polyurethane foam Substances 0.000 description 6
- 239000002957 persistent organic pollutant Substances 0.000 description 5
- 239000005011 phenolic resin Substances 0.000 description 5
- 238000002474 experimental method Methods 0.000 description 4
- 238000000605 extraction Methods 0.000 description 4
- 238000002290 gas chromatography-mass spectrometry Methods 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- YFSUTJLHUFNCNZ-UHFFFAOYSA-N perfluorooctane-1-sulfonic acid Chemical compound OS(=O)(=O)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)F YFSUTJLHUFNCNZ-UHFFFAOYSA-N 0.000 description 4
- 238000011002 quantification Methods 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 230000004913 activation Effects 0.000 description 3
- 238000005273 aeration Methods 0.000 description 3
- 125000000217 alkyl group Chemical group 0.000 description 3
- 238000009826 distribution Methods 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- 239000007800 oxidant agent Substances 0.000 description 3
- 230000003647 oxidation Effects 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- -1 perfluoroalkyl compound Chemical class 0.000 description 3
- 239000002023 wood Substances 0.000 description 3
- JCMNMOBHVPONLD-UHFFFAOYSA-N 3,3,4,4,5,5,6,6,6-nonafluorohexan-1-ol Chemical compound OCCC(F)(F)C(F)(F)C(F)(F)C(F)(F)F JCMNMOBHVPONLD-UHFFFAOYSA-N 0.000 description 2
- 238000004438 BET method Methods 0.000 description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 235000013162 Cocos nucifera Nutrition 0.000 description 2
- 244000060011 Cocos nucifera Species 0.000 description 2
- 229920000858 Cyclodextrin Polymers 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- 150000001298 alcohols Chemical class 0.000 description 2
- 238000010000 carbonizing Methods 0.000 description 2
- 229910001873 dinitrogen Inorganic materials 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910052731 fluorine Inorganic materials 0.000 description 2
- 239000011737 fluorine Substances 0.000 description 2
- 239000010903 husk Substances 0.000 description 2
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 2
- 239000012046 mixed solvent Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- SNGREZUHAYWORS-UHFFFAOYSA-N perfluorooctanoic acid Chemical compound OC(=O)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)F SNGREZUHAYWORS-UHFFFAOYSA-N 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 238000012113 quantitative test Methods 0.000 description 2
- HFHDHCJBZVLPGP-UHFFFAOYSA-N schardinger α-dextrin Chemical compound O1C(C(C2O)O)C(CO)OC2OC(C(C2O)O)C(CO)OC2OC(C(C2O)O)C(CO)OC2OC(C(O)C2O)C(CO)OC2OC(C(C2O)O)C(CO)OC2OC2C(O)C(O)C1OC2CO HFHDHCJBZVLPGP-UHFFFAOYSA-N 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- JIAARYAFYJHUJI-UHFFFAOYSA-L zinc dichloride Chemical compound [Cl-].[Cl-].[Zn+2] JIAARYAFYJHUJI-UHFFFAOYSA-L 0.000 description 2
- 239000005968 1-Decanol Substances 0.000 description 1
- 239000004925 Acrylic resin Substances 0.000 description 1
- 229920000178 Acrylic resin Polymers 0.000 description 1
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- 208000033962 Fontaine progeroid syndrome Diseases 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 241000533293 Sesbania emerus Species 0.000 description 1
- 230000003213 activating effect Effects 0.000 description 1
- 239000003570 air Substances 0.000 description 1
- 150000007824 aliphatic compounds Chemical class 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 125000004432 carbon atom Chemical group C* 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 238000003763 carbonization Methods 0.000 description 1
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 238000005119 centrifugation Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 239000011300 coal pitch Substances 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000003795 desorption Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000010828 elution Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 239000000706 filtrate Substances 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 125000001153 fluoro group Chemical group F* 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 125000001183 hydrocarbyl group Chemical group 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- QWPPOHNGKGFGJK-UHFFFAOYSA-N hypochlorous acid Chemical compound ClO QWPPOHNGKGFGJK-UHFFFAOYSA-N 0.000 description 1
- 238000004895 liquid chromatography mass spectrometry Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000004949 mass spectrometry Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000005022 packaging material Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N phenol group Chemical group C1(=CC=CC=C1)O ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 239000011295 pitch Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000011158 quantitative evaluation Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000012756 surface treatment agent Substances 0.000 description 1
- 238000010301 surface-oxidation reaction Methods 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 229920002803 thermoplastic polyurethane Polymers 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 239000003643 water by type Substances 0.000 description 1
- 239000011592 zinc chloride Substances 0.000 description 1
- 235000005074 zinc chloride Nutrition 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B32/00—Carbon; Compounds thereof
- C01B32/30—Active carbon
- C01B32/354—After-treatment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D39/00—Filtering material for liquid or gaseous fluids
- B01D39/14—Other self-supporting filtering material ; Other filtering material
- B01D39/20—Other self-supporting filtering material ; Other filtering material of inorganic material, e.g. asbestos paper, metallic filtering material of non-woven wires
- B01D39/2055—Carbonaceous material
- B01D39/2065—Carbonaceous material the material being fibrous
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/68—Halogens or halogen compounds
- B01D53/70—Organic halogen compounds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/20—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising free carbon; comprising carbon obtained by carbonising processes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
- B01J20/28014—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their form
- B01J20/28023—Fibres or filaments
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
- B01J20/28054—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their surface properties or porosity
- B01J20/28057—Surface area, e.g. B.E.T specific surface area
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
- B01J20/28054—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their surface properties or porosity
- B01J20/28057—Surface area, e.g. B.E.T specific surface area
- B01J20/28066—Surface area, e.g. B.E.T specific surface area being more than 1000 m2/g
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
- B01J20/28054—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their surface properties or porosity
- B01J20/28069—Pore volume, e.g. total pore volume, mesopore volume, micropore volume
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
- B01J20/28054—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their surface properties or porosity
- B01J20/28088—Pore-size distribution
- B01J20/28092—Bimodal, polymodal, different types of pores or different pore size distributions in different parts of the sorbent
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B32/00—Carbon; Compounds thereof
- C01B32/30—Active carbon
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
- B01D2253/10—Inorganic adsorbents
- B01D2253/102—Carbon
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
- B01D2253/30—Physical properties of adsorbents
- B01D2253/302—Dimensions
- B01D2253/306—Surface area, e.g. BET-specific surface
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
- B01D2253/30—Physical properties of adsorbents
- B01D2253/302—Dimensions
- B01D2253/308—Pore size
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
- B01D2253/30—Physical properties of adsorbents
- B01D2253/302—Dimensions
- B01D2253/311—Porosity, e.g. pore volume
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/20—Halogens or halogen compounds
- B01D2257/206—Organic halogen compounds
- B01D2257/2066—Fluorine
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/06—Polluted air
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/12—Surface area
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/14—Pore volume
Definitions
- the present invention relates to pel and polyfluoroalkyl compound adsorption activated carbon that collects pel and polyfluoroalkyl compounds contained in an atmospheric sample.
- Pell and polyfluoroalkyl compounds are fluorine-substituted aliphatic compounds having high thermal stability, high chemical stability, and high surface modification activity. Pell and polyfluoroalkyl compounds are widely used in industrial and chemical applications such as surface treatment agents, packaging materials, and liquid fire extinguishing agents by taking advantage of the above characteristics.
- the perfluoroalkyl compound has a completely fluorinated linear alkyl group and is a substance represented by the chemical formula (ii).
- PFOS perfluorooctane sulfonic acid
- PFOA perfluorooctanoic acid
- IUPAC name 2,2,3,3,4,5,5,6,6,7,7,8,8,8- Pentadecafluorooctanoic acid
- a polyfluoroalkyl compound indicates a substance in which a part of hydrogen of an alkyl group is replaced with fluorine, and is a substance represented by the chemical formula (iii). For example, there is fluorotelomer alcohol and the like.
- Patent Document 1 an organic fluorine-based compound adsorbent made of a cyclodextrin polymer has been proposed (Patent Document 1).
- This adsorbent is not suitable for use as a collector used for quantitative measurement because it specializes only in adsorption and cannot desorb the compound.
- the cyclodextrin polymer is in the form of powder or fine particles, has poor handling, has high resistance during liquid passage or aeration, and has problems such as a risk of outflow of fine powder to the secondary side.
- pel and polyfluoroalkyl compounds remain in the environment in various forms with a wide range of physicochemical properties, and there is a problem that existing adsorbents do not have sufficient collection performance and accurate quantitative measurement cannot be performed. there were.
- the present invention has been made in view of the above points, and in particular, a pel and polyfluoroalkyl compound adsorbed activated carbon capable of desorbably collecting pel and polyfluoroalkyl compounds in an atmospheric sample, and activated carbon thereof.
- the filter body used is provided.
- the first invention is the adsorption of pel and polyfluoroalkyl compounds for desorbably adsorbing pel and polyfluoroalkyl compounds in an atmospheric sample made of an activated carbon adsorbent having a BET specific surface area of 900 m 2 / g or more.
- activated carbon adsorbent having a BET specific surface area of 900 m 2 / g or more.
- the second invention relates to the per and polyfluoroalkyl compound adsorbing activated carbon in which the sum (V mic ) of the micropore volume of 1 nm or less of the activated carbon adsorbent is 0.35 cm 3 / g or more in the first invention.
- the third invention is the adsorption of pel and polyfluoroalkyl compounds in which the sum (V met ) of the mesopore volumes of the activated carbon adsorbent of 2 to 60 nm or less is 0.02 cm 3 / g or more in the first or second invention.
- V met the sum of the mesopore volumes of the activated carbon adsorbent of 2 to 60 nm or less is 0.02 cm 3 / g or more in the first or second invention.
- the fourth invention is the sum of the micropore volumes (V mic ) and the mesopore volume (V) specified in the following formula (i) of the activated carbon adsorbent in any of the first to third inventions. It relates to pel and polyfluoroalkyl compound adsorption activated carbon having a volume difference (V s) of 0.45 or more from met).
- the fifth invention relates to pel and polyfluoroalkyl compound adsorbing activated carbon in which the surface oxide amount of the activated carbon adsorbent is 0.10 meq / g or more in any one of the first to fourth inventions.
- the sixth invention relates to pel and polyfluoroalkyl compound adsorbed activated carbon in which the activated carbon adsorbent is a fibrous activated carbon in any one of the first to fifth inventions.
- the seventh invention relates to a pel and polyfluoroalkyl compound adsorption filter body, which retains the adsorption activated carbon according to any one of the first to sixth inventions.
- the pel and polyfluoroalkyl compounds in an atmospheric sample made of an activated carbon adsorbent having a BET specific surface area of 900 m 2 / g or more can be desorbably adsorbed. Because it is a per and polyfluoroalkyl compound adsorption activated carbon for this purpose, the compound, which has been considered difficult to quantitatively measure, can be desorbably collected.
- the sum (V mic ) of the micropore volume of 1 nm or less of the activated carbon adsorbent is 0.35 cm 3 / g or more. Therefore, the pel and the polyfluoroalkyl compound can be efficiently and detachably collected.
- the sum (V met ) of the mesopore volumes of the activated carbon adsorbent having a mesopore volume of 2 to 60 nm or less is 0.02 cm 3 /. Since it is g or more, the pel and polyfluoroalkyl compounds can be efficiently and desorbably collected.
- the sum of the micropore volumes (V) specified in the following formula (i) of the activated carbon adsorbent is 0.45 or more, the pel and polyfluoroalkyl compounds can be efficiently and desorbably collected. ..
- the amount of surface oxide of the activated carbon adsorbent is 0.10 meq / g or more. It has not only adsorption performance by pores but also chemical adsorption ability, and can further improve the adsorption performance of pel and polyfluoroalkyl compounds.
- the activated carbon adsorbent is a fibrous activated carbon, contact with the pel and the polyfluoroalkyl compound. The efficiency can be increased and the adsorption performance can be improved.
- the pel and polyfluoroalkyl compound adsorption filter body according to the seventh invention since the adsorption activated carbon according to any one of the first to sixth inventions is retained, the collection efficiency of the pel and polyfluoroalkyl compounds is improved. At the same time, it can be provided with good handleability.
- the pel and polyfluoroalkyl compound adsorption activated carbon of the present invention is composed of fibrous activated carbon or granular activated carbon.
- the fibrous activated carbon is an activated carbon obtained by carbonizing and activating an appropriate fiber, and examples thereof include a phenol resin type, an acrylic resin type, a cellulose type, and a coal pitch type.
- the fiber length, cross-sectional diameter, etc. are appropriate.
- Raw materials for granular activated carbon include wood (waste wood, thinned wood, ogako), coffee bean pomace, rice husks, coconut husks, bark, and fruit nuts. These naturally derived raw materials are likely to develop pores by carbonization and activation. Moreover, since it is a secondary use of waste, it can be procured at low cost. In addition, fired products derived from synthetic resins such as tires, petroleum pitches, urethane resins, and phenol resins, and coal and the like can also be used as raw materials.
- the activated carbon raw material is carbonized by heating in a temperature range of 200 ° C. to 600 ° C. as needed to form fine pores. Subsequently, the activated carbon raw material is exposed to water vapor and carbon dioxide gas in a temperature range of 600 ° C. to 1200 ° C. and is activated. As a result, activated carbon with various pores developed is completed. In addition, at the time of activation, there is also zinc chloride activation and the like. In addition, sequential cleaning is also performed.
- the physical properties of the activated carbon thus produced define the adsorption performance of the substance to be adsorbed.
- the adsorption performance of activated carbon that adsorbs pel and polyfluoroalkyl compounds, which are substances to be adsorbed, is defined by the specific surface area, which is an index indicating the amount of pores formed in the activated carbon.
- the specific surface area of each prototype is measured by the BET method (Brunauer, Emmett and Teller method).
- Activated carbon is also defined by the pore size of the pores.
- an adsorbent such as activated carbon
- any of micropores, mesopores, and macropores is present.
- the adsorption target and performance of activated carbon change depending on which range of pores are developed more.
- the activated carbon desired in the present invention is to desorbably and effectively adsorb molecules of pel and polyfluoroalkyl compounds.
- acidic functional groups on the surface of activated carbon there are acidic functional groups on the surface of activated carbon.
- the acidic functional groups that increase due to the surface oxidation of activated carbon are mainly hydrophilic groups such as carboxyl groups and phenolic hydroxyl groups. Acidic functional groups on the surface of activated carbon affect the collection capacity. The amount of these acidic functional groups can be grasped as the amount of surface oxide. When the amount of surface oxide of activated carbon is increased, the hydrophilicity of the surface of activated carbon is increased, and it is considered that the collection performance of fluorotelomer alcohols having a hydrophilic group among pel and polyfluoroalkyl compounds is improved.
- the following methods can be mentioned as methods for increasing the surface oxide of activated carbon.
- One is a method of promoting the oxidation of surface residues and increasing the number of acidic functional groups by going through the heating step again. That is, oxidation in air or oxygen atmosphere.
- air having a temperature of 25 to 40 ° C. and a humidity of 60 to 90% is introduced in an air atmosphere. Therefore, activated carbon having an increased amount of surface oxide can be obtained by heating at 150 to 900 ° C. for 1 to 10 hours. It is considered that the amount of acidic functional groups increases due to oxidation of hydrocarbon groups such as alkyl groups existing on the surface of activated carbon by heating with moist air and introduction of hydroxyl groups of water to the surface.
- Another method is to oxidize the surface of activated carbon with an oxidizing agent to increase the surface oxide.
- the oxidizing agent include hypochlorous acid and hydrogen peroxide.
- Activated carbon with an increased amount of surface oxide can be obtained by immersing the activated carbon in a liquid containing these oxidizing agents and then drying it.
- the amount of acidic functional groups on the surface of the activated carbon can be measured as the amount of surface oxide as shown in each prototype described later.
- the adsorption performance of activated carbon that desorbably adsorbs pel and polyfluoroalkyl compounds in an atmospheric sample is exhibited by setting the specific surface area to 900 m 2 / g or more, as derived from the examples described later. When the pores of the activated carbon are formed to a certain level or more, the adsorption performance of the compound is ensured.
- the micropores refer to pores having a pore diameter of 1 nm or less, and the total pore volume (V mic ) of the micropores is 0.35 cm 3 / g or more as derived from the examples described later. Then, the adsorption performance of the pel and the polyfluoroalkyl compound in the atmospheric sample is improved.
- the micropore volume of 1 nm or less in each prototype is measured by the MP method (Micropore method). It is considered that when the micropores are formed to a certain level or more, the compound is easily collected in the pores.
- the mesopore refers to a pore having a pore diameter in the range of 2 to 60 nm, and the total pore volume (V met) of the mesopore is 0 as derived from the examples described later.
- V met the total pore volume of the mesopore
- the mesopore volume in the range of 2 to 60 nm of each prototype is measured by the DH method (Dollimore-Heal method). Since it was measured by the DH method, the measurement target was pores of 2.43 to 59.72 nm. It is considered that when the mesopores are formed to a certain level or more, the compound can easily penetrate into the micropores.
- the difference between the pore volume of the micropores and the pore volume of the mesopores is also considered to contribute to the efficient adsorption of the per and polyfluoroalkyl compounds.
- the volume difference (V s ) between the sum of the micropore volumes (V mic ) and the sum of the mesopore volumes (V met ) is 0.45 or more in the atmospheric sample.
- Per and polyfluoroalkyl compounds can be efficiently and desorbably adsorbed.
- the adsorption performance of the pel and polyfluoroalkyl compounds is improved, and the compounds are smoothed during the subsequent extraction operation. It is considered that quantitative measurement can be performed satisfactorily by making it desorbable.
- the hydrophilicity of the surface of activated carbon can be enhanced, and the per and polyfluoroalkyl compounds in the atmospheric sample can be efficiently adsorbed.
- Activated carbon adsorbent used The inventors used the following raw materials to prepare pel and polyfluoroalkyl compound adsorption activated carbon.
- the specific surface area (m 2 / g) was determined by the BET method by measuring the nitrogen adsorption isotherm at 77K using the automatic specific surface area / pore distribution measuring device "BELSORP? MiniII” manufactured by Microtrac Bell Co., Ltd. (BET specific surface area).
- the average pore diameter (nm) was calculated by a mathematical formula (iv) using the values of the pore volume (cm 3 / g) and the specific surface area (m 2 / g), assuming that the shape of the pores is cylindrical. ..
- Table 1 shows the physical characteristics of the activated carbons of Prototype Examples 1 to 5. From the top of Table 1, the amount of surface oxide (meq / g), BET specific surface area (m 2 / g), average pore diameter (nm), and average fiber diameter ( ⁇ m) are shown.
- FTOHs fluorotelomer alcohol
- N-EtFOSA ethyl perfluorooctanosulfonamide
- N-EtFOSA is a substance represented by the following chemical formula (v).
- Each standard substance was diluted to 100 ppb with methanol, and 100 ⁇ l was added to flexible polyurethane foam (PUF), which was set in the first stage. Subsequently, 1.2 g of the adsorption activated carbon of the prototype example was filled in the case of 45 mm ⁇ in the second stage, and air at 22 to 24 ° C. was applied to the PUF of the first stage and the fibrous activated carbon of the second stage at a speed of 20 l / min. Ventilated for 48 hours.
- PUF flexible polyurethane foam
- the activated carbon adsorbent of the prototype example was sufficiently contact-stirred with 15 ml of a mixed solvent containing dichloromethane and ethyl acetate as main components, followed by centrifugation, solid-liquid separation, and an extract was collected.
- the extract was quantitatively measured in MRM mode using GC-MS / MS (QuatrimicroGC manufactured by Waters), and the collection performance was confirmed.
- Table 2 shows the recovery rate (%) of fluorotelomer alcohol (FTOH) for each target substance for the activated carbons of Prototype Examples 1 to 5.
- the target substances are 4: 2FTOH (IUPAC name: 3,3,4,4,5,5,6,6,6-nonafluoro-1-hexanol), 6: 2FTOH (IUPAC name: 3,3,4,4). , 5,5,6,6,7,7,8,8,8-tridecafluoro-1-octanol), 8: 2FTOH, 10: 2FTOH (IUPAC name: 3,3,4,5,5) , 6,6,7,7,8,8,9,9,10,10,11,11,12,12,12-henicosafluoro-1-dodecanol), N-EtFOSA.
- ND indicates that it is below the lower limit of quantification.
- recovery rate was 150% or more due to the co-elution phenomenon in which the mass number affected the same fragment.
- ⁇ Prototype example 9 10 g of Futamura Chemical's fibrous activated carbon "FE3010" (C2) was immersed in 500 ml of a hydrogen peroxide concentration 4.2% solution, allowed to stand for 150 hours, then taken out and dried to obtain the activated carbon of Prototype Example 9.
- the pore volume was measured by nitrogen adsorption using an automatic specific surface area / pore distribution measuring device (“BELSORP-miniII”, manufactured by Microtrac Bell Co., Ltd.).
- the volume difference (V s ) of Prototype Examples 6 to 21 is the value obtained by subtracting the sum of mesopore volumes (V met ) (cm 3 / g) from the sum of micropore volumes (V mic ) (cm 3 / g). Therefore, it was calculated from the above equation (i).
- the physical characteristics of the activated carbons of Prototype Examples 6 to 21 are shown in Tables 3 and 4. From the top of Table 3, the amount of surface oxide (meq / g), BET specific surface area (m 2 / g), average pore diameter (nm), micropore volume (V mic ) (cm 3 / g), mesopores. The volume (V met ) (cm 3 / g) and the volume difference (V s ) (cm 3 / g).
- Each standard substance was diluted to 100 ng / ml (100 ppb) with methanol, 100 ⁇ l was added to flexible polyurethane foam (PUF), and the mixture was set in the first stage.
- the activated carbon of the prototype example was filled in the case of 47 mm ⁇ in the second stage so that the thickness at the time of filling was about 2 mm, and air at 22 to 24 ° C. was applied to the PUF in the first stage and the second stage at a speed of 20 l / min.
- the fibrous activated carbon of the eyes was aerated for 48 hours.
- the activated carbon of the prototype was transferred to a PP centrifuge tube (capacity: 15 ml), and 10 ml of a mixed solvent containing dichloromethane and ethyl acetate as main components was added.
- the centrifuge tube was shaken at 225 rpm for 10 minutes, and then the extract was collected. The process of collecting the extract was repeated twice in succession, and a total of 30 ml of the extract was collected.
- Tables 6 to 8 show the recovery rate (%) of fluorotelomer alcohols (FTOHs) for each target substance for the activated carbons of Prototype Examples 6 to 21.
- the target substances are 4: 2FTOH (IUPAC name: 3,3,4,4,5,5,6,6,6-nonafluoro-1-hexanol), 6: 2FTOH (IUPAC name: 3,3,4,4). , 5,5,6,6,7,7,8,8,8-tridecafluoro-1-octanol), 8: 2FTOH, 10: 2FTOH (IUPAC name: 3,3,4,5,5) , 6,6,7,7,8,8,9,9,10,10,11,11,12,12,12-henicosafluoro-1-dodecanol).
- Prototype Examples 10 to 21 were recoverable for any of the FTOHs. It was shown that the target substance can be adsorbed when the BET specific surface area is 900 m 2 / g or more. It is inferred that the parameter of the specific surface area of activated carbon has a certain effect on the adsorption performance of each FTOH. In particular, Prototype Examples 10 to 19, which are fibrous activated carbons, had good results of 50% or more in any FTOH recovery rate. From the viewpoint of the contact efficiency between the target substance and the activated carbon, it is considered that the fibrous activated carbon can adsorb FTOH more efficiently.
- Prototype Examples 10 to 21 the pore volumes of both the micropores and the mesopores are large, and it is considered that both pores are sufficiently developed, so that the FTOH molecule is smoothly introduced into the pores of the activated carbon. It can be inferred that excellent adsorption performance was shown.
- Prototype Examples 12 to 19 showed particularly excellent FTOH recovery performance.
- Prototype Examples 12 to 19 are characterized in that the pore volume of the micropores is large and the pore volume of the mesopores is not so large although the pores of the mesopores are developed. After adsorbing the FTOH molecule in the micropores, it is easy to be smoothly desorbed from the pores during the extraction operation, so it is considered that a particularly good recovery rate was shown.
- Prototype Examples 20 and 21 can be said to be activated carbons having pores that are complicatedly developed from large pores to small pores because both the micropores and the mesopores have large pore volumes. It is presumed that the FTOH molecules adsorbed in the complicatedly developed pores were difficult to be smoothly desorbed during the extraction operation, and the recovery rate of FTOH was slightly inferior to that of Prototype Examples 12 to 19. Will be done. In view of these results, the sum of the pore volumes of the micropores of the activated carbon (V mic ), the sum of the pore volumes of the mesopores (V met ), and the volume difference (V s ), which is the difference between them, are the recovery of FTOH. It is understood that the rate is affected.
- the pel and polyfluoroalkyl compound adsorption activated carbon of the present invention can desorbably adsorb the pel and polyfluoroalkyl compound in the atmospheric sample, the quantification of the compound, which was not possible with the existing collection material. The measurement was made possible. This enabled effective quantitative evaluation of persistent organic pollutants.
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Abstract
Description
発明者らは、ペル及びポリフルオロアルキル化合物吸着活性炭を作成するため、下記の原料を使用した。
・繊維状活性炭
フタムラ化学株式会社製:繊維状活性炭「CF」(平均繊維径:15μm)
{以降、C1と表記する。}
フタムラ化学株式会社製:繊維状活性炭「FE3010」(平均繊維径:15μm)
{以降、C2と表記する。}
フタムラ化学株式会社製:繊維状活性炭「FE3012」(平均繊維径:15μm)
{以降、C3と表記する。}
フタムラ化学株式会社製:繊維状活性炭「FE3013」(平均繊維径:15μm)
{以降、C4と表記する。}
フタムラ化学株式会社製:繊維状活性炭「FE3015」(平均繊維径:15μm)
{以降、C5と表記する。}
フタムラ化学株式会社製:繊維状活性炭「FE3018」(平均繊維径:15μm)
{以降、C6と表記する。}
・粒状活性炭
フタムラ化学株式会社製:ヤシ殻活性炭「CW480SZ」(平均粒径:250μm)
{以降、C7と表記する。}
フタムラ化学株式会社製:フェノール樹脂活性炭「QW250」(平均粒径:250μm)
{以降、C8と表記する。}
発明者らは下記の試作例1~5を用いて、大気試料中のペル及びポリフルオロアルキル化合物の捕集実験1を行った。
<試作例1>
FE3010と同原料であるフェノール樹脂繊維を600℃で炭化した繊維状活性炭「CF」(C1)を試作例1の活性炭とした。
フタムラ化学製繊維状活性炭「FE3015」(C5)を試作例2の活性炭とした。
フタムラ化学製繊維状活性炭「FE3010」(C2)10gを、過酸化水素濃度6%溶液500mlに浸漬させ、150時間静置後、取り出して乾燥させ試作例3の活性炭とした。
フタムラ化学製繊維状活性炭「FE3015」(C5)10gを、過酸化水素濃度6%溶液500mlに浸漬させ、70時間静置後、取り出して乾燥させ試作例4の活性炭とした。
フタムラ化学製繊維状活性炭「FE3018」(C6)10gを、過酸化水素濃度6%溶液500mlに浸漬させ、50時間静置後、取り出して乾燥させ試作例5の活性炭とした。
〔表面酸化物量〕
表面酸化物量(meq/g)は、Boehmの方法を適用し、0.05N水酸化ナトリウム水溶液中において各例の吸着活性炭を振とうした後に濾過し、その濾液を0.05N塩酸で中和滴定した際の水酸化ナトリウム量とした。
比表面積(m2/g)は、マイクロトラック・ベル株式会社製、自動比表面積/細孔分布測定装置「BELSORP?miniII」を使用して77Kにおける窒素吸着等温線を測定し、BET法により求めた(BET比表面積)。
平均細孔直径(nm)は、細孔の形状を円筒形と仮定し、細孔容積(cm3/g)及び比表面積(m2/g)の値を用いて数式(iv)より求めた。
ペル及びポリフルオロアルキル化合物として、今回はフルオロテロマーアルコール(以降「FTOHs」と表記する。)及びエチルペルフルオロオクタンスルホアミド(IUPAC名:N-エチル-1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8,8-ヘプタデカフルオロオクタン-1-スルホアミド)(以降「N-EtFOSA」と表記する。)を用いて評価を行った。FTOHsは上記した化学式(ii)に表される物質であって、炭素数によって物質名が異なる。例えば、C8F17CH2CH2OHの場合は、8:2FTOH(IUPAC名:3,3,4,4,5,5,6,6,7,7,8,8,9,9,10,10,10-ヘプタデカフルオロ-1-デカノール)と命名される。N-EtFOSAは以下の化学式(v)に表される物質である。
次に、発明者らは下記の試作例6~21を用いて、GC-MS/MSのMRMモードの最適なトランジションとコリジョンエネルギーを再検討し、より精度の高い分析条件の下、大気試料中のペル及びポリフルオロアルキル化合物の捕集実験2を行った。
<試作例6>
フタムラ化学製繊維状活性炭「CF」(C1)10gを試作例6の活性炭とした。
フタムラ化学製繊維状活性炭「CF」(C1)10gを過酸化水素濃度4.2%溶液500mlに浸漬させ、220時間静置後、取り出して乾燥させ試作例7の活性炭とした。
フタムラ化学製繊維状活性炭「FE3010」(C2)10gを試作例8の活性炭とした。
フタムラ化学製繊維状活性炭「FE3010」(C2)10gを過酸化水素濃度4.2%溶液500mlに浸漬させ、150時間静置後、取り出して乾燥させ試作例9の活性炭とした。
フタムラ化学製繊維状活性炭「FE3012」(C3)10gを試作例10の活性炭とした。
フタムラ化学製繊維状活性炭「FE3012」(C3)10gを過酸化水素濃度4.2%溶液500mlに浸漬させ、100時間静置後、取り出して乾燥させ試作例11の活性炭とした。
フタムラ化学製繊維状活性炭「FE3013」(C4)10gを過酸化水素濃度1.5%溶液500mlに浸漬させ、70時間静置後、取り出して乾燥させ試作例12の活性炭とした。
フタムラ化学製繊維状活性炭「FE3015」(C5)10gを試作例13の活性炭とした。
フタムラ化学製繊維状活性炭「FE3015」(C5)10gを過酸化水素濃度1.5%溶液500mlに浸漬させ、40時間静置後、取り出して乾燥させ試作例14の活性炭とした。
フタムラ化学製繊維状活性炭「FE3015」(C5)10gを過酸化水素濃度4.2%溶液500mlに浸漬させ、70時間静置後、取り出して乾燥させ試作例15の活性炭とした。
フタムラ化学製繊維状活性炭「FE3015」(C5)10gを過酸化水素濃度14.0%溶液500mlに浸漬させ、350時間静置後、取り出して乾燥させ試作例16の活性炭とした。
フタムラ化学製繊維状活性炭「FE3015」(C5)10gを過酸化水素濃度18.9%溶液500mlに浸漬させ、480時間静置後、取り出して乾燥させ試作例17の活性炭とした。
フタムラ化学製繊維状活性炭「FE3018」(C6)10gを試作例18の活性炭とした。
フタムラ化学製繊維状活性炭「FE3018」(C6)10gを過酸化水素濃度4.2%溶液500mlに浸漬させ、50時間静置後、取り出して乾燥させ試作例19の活性炭とした。
フタムラ化学製ヤシ殻活性炭「CW480SZ」(C7)10gを過酸化水素濃度4.2%溶液500mlに浸漬させ、70時間静置後、取り出して乾燥させ試作例20の活性炭とした。
フタムラ化学製フェノール樹脂活性炭「QW250」(C8)10gを過酸化水素濃度4.2%溶液500mlに浸漬させ、70時間静置後、取り出して乾燥させ試作例21の活性炭とした。
試作例6~21の表面酸化物、比表面積及び平均細孔直径は上記「活性炭の測定1」と同様に求めた。
細孔容積については、自動比表面積/細孔分布測定装置(「BELSORP-miniII」、マイクロトラック・ベル株式会社製)を使用し、窒素吸着により測定した。試作例6~21の細孔直径1nm以下の範囲の細孔容積であるミクロ孔容積の和(Vmic)(cm3/g)は、細孔直径1nm以下の範囲におけるdV/dDの値を窒素ガスの吸着等温線のt-plotからMP法により解析して求めた。
細孔直径が2~60nmの範囲におけるdV/dDの値は、窒素ガスの吸着等温線からDH法により解析した。なお、解析ソフトにおける細孔直径2~60nmの直径範囲は2.43~59.72nmである。この解析結果より、試作例6~21細孔直径2~60nmの範囲の細孔容積であるメソ孔容積の和(Vmet)(cm3/g)を求めた。
試作例6~21の容積差(Vs)は、ミクロ孔容積の和(Vmic)(cm3/g)からメソ孔容積の和(Vmet)(cm3/g)を引いた値であって、上記(i)式から算出した。
ペル及びポリフルオロアルキル化合物として、上記捕集実験1と同様にFTOHsを用いて試作例6~21について評価を行った。
試作例6~9は、いずれのFTOHにおいても回収率は定量下限値以下であり、対象物質の吸着が不十分であった。対象物質の吸着に必要な細孔ないし比表面積を有していないため、吸着性能が発揮されなかったと推察される。
Claims (7)
- BET比表面積が900m2/g以上である活性炭吸着材からなる
大気試料中のペル及びポリフルオロアルキル化合物を脱離可能に吸着するための
ペル及びポリフルオロアルキル化合物吸着活性炭。 - 前記活性炭吸着材の1nm以下のミクロ孔容積の和(Vmic)が0.35cm3/g以上である請求項1に記載のペル及びポリフルオロアルキル化合物吸着活性炭。
- 前記活性炭吸着材の2~60nm以下のメソ孔容積の和(Vmet)が0.02cm3/g以上である請求項1又は2に記載のペル及びポリフルオロアルキル化合物吸着活性炭。
- 前記活性炭吸着材の表面酸化物量が0.10meq/g以上である請求項1ないし4のいずれか1項に記載のペル及びポリフルオロアルキル化合物吸着活性炭。
- 前記活性炭吸着材が繊維状活性炭である請求項1ないし5のいずれか1項に記載のペル及びポリフルオロアルキル化合物吸着活性炭。
- 請求項1ないし6のいずれか1項に記載の吸着活性炭を保持してなることを特徴とするペル及びポリフルオロアルキル化合物吸着フィルター体。
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
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BR112022003001A BR112022003001A2 (pt) | 2019-08-20 | 2020-08-11 | Carvão ativado por adsorção de compostos per- e polifluoroalquila |
US17/753,068 US20220289578A1 (en) | 2019-08-20 | 2020-08-11 | Per- and polyfluoroalkyl compound-adsorbing activated carbon |
AU2020334452A AU2020334452A1 (en) | 2019-08-20 | 2020-08-11 | Per- and polyfluoroalkyl compound-adsorbing activated carbon |
CN202080058499.5A CN114302769B (zh) | 2019-08-20 | 2020-08-11 | 吸附全氟和多氟烷基化合物的活性炭 |
EP20855566.4A EP4019124A4 (en) | 2019-08-20 | 2020-08-11 | PER- AND POLYFLUORALKYL COMPOUND ADSORBING ACTIVE CARBON |
KR1020227007779A KR20220068989A (ko) | 2019-08-20 | 2020-08-11 | 퍼 및 폴리플루오로알킬 화합물 흡착 활성탄 |
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