JP6820148B2 - 使用済み放射性セシウム吸着繊維の減容化方法 - Google Patents
使用済み放射性セシウム吸着繊維の減容化方法 Download PDFInfo
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- JP6820148B2 JP6820148B2 JP2016020584A JP2016020584A JP6820148B2 JP 6820148 B2 JP6820148 B2 JP 6820148B2 JP 2016020584 A JP2016020584 A JP 2016020584A JP 2016020584 A JP2016020584 A JP 2016020584A JP 6820148 B2 JP6820148 B2 JP 6820148B2
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- radioactive cesium
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- 230000002285 radioactive effect Effects 0.000 title claims description 76
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- 238000000034 method Methods 0.000 title claims description 12
- 229910052792 caesium Inorganic materials 0.000 claims description 55
- TVFDJXOCXUVLDH-UHFFFAOYSA-N caesium atom Chemical compound [Cs] TVFDJXOCXUVLDH-UHFFFAOYSA-N 0.000 claims description 55
- 238000010438 heat treatment Methods 0.000 claims description 32
- 239000002861 polymer material Substances 0.000 claims description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 20
- 229910021536 Zeolite Inorganic materials 0.000 claims description 17
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 claims description 17
- 239000010457 zeolite Substances 0.000 claims description 17
- 239000002245 particle Substances 0.000 claims description 15
- 229920002492 poly(sulfone) Polymers 0.000 claims description 14
- 239000011148 porous material Substances 0.000 claims description 10
- 229920000642 polymer Polymers 0.000 claims description 9
- 239000000243 solution Substances 0.000 description 15
- 238000010828 elution Methods 0.000 description 10
- SECXISVLQFMRJM-UHFFFAOYSA-N N-Methylpyrrolidone Chemical compound CN1CCCC1=O SECXISVLQFMRJM-UHFFFAOYSA-N 0.000 description 6
- 238000011038 discontinuous diafiltration by volume reduction Methods 0.000 description 6
- 238000002360 preparation method Methods 0.000 description 6
- 238000005979 thermal decomposition reaction Methods 0.000 description 5
- 238000001179 sorption measurement Methods 0.000 description 4
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 description 3
- 238000000465 moulding Methods 0.000 description 3
- 239000003960 organic solvent Substances 0.000 description 3
- 239000008188 pellet Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- LRHPLDYGYMQRHN-UHFFFAOYSA-N N-Butanol Chemical compound CCCCO LRHPLDYGYMQRHN-UHFFFAOYSA-N 0.000 description 2
- 239000004677 Nylon Substances 0.000 description 2
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- DCYOBGZUOMKFPA-UHFFFAOYSA-N iron(2+);iron(3+);octadecacyanide Chemical compound [Fe+2].[Fe+2].[Fe+2].[Fe+3].[Fe+3].[Fe+3].[Fe+3].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-] DCYOBGZUOMKFPA-UHFFFAOYSA-N 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- BDAGIHXWWSANSR-UHFFFAOYSA-N methanoic acid Natural products OC=O BDAGIHXWWSANSR-UHFFFAOYSA-N 0.000 description 2
- 229920001778 nylon Polymers 0.000 description 2
- 229920002239 polyacrylonitrile Polymers 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 229960003351 prussian blue Drugs 0.000 description 2
- 239000013225 prussian blue Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- OSWFIVFLDKOXQC-UHFFFAOYSA-N 4-(3-methoxyphenyl)aniline Chemical compound COC1=CC=CC(C=2C=CC(N)=CC=2)=C1 OSWFIVFLDKOXQC-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 150000008360 acrylonitriles Chemical class 0.000 description 1
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- 238000002845 discoloration Methods 0.000 description 1
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- 235000013312 flour Nutrition 0.000 description 1
- -1 for example Substances 0.000 description 1
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- 229910021645 metal ion Inorganic materials 0.000 description 1
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- 229920000172 poly(styrenesulfonic acid) Polymers 0.000 description 1
- 229940005642 polystyrene sulfonic acid Drugs 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/62—Plastics recycling; Rubber recycling
Landscapes
- Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
- Artificial Filaments (AREA)
Description
原料として、ポリスルホン(BASF社製、分子量不明、グレードE2010)、ゼオライト(日東粉化商事株式会社製、粒径150メッシュ)、NMP(米山科学工業社製)を用いた。
加熱加圧工程における最適な温度を検討するため、上記で作製した使用前の放射性セシウム吸着繊維を大気下の常圧で各温度にて2時間加熱して、外観、質量、BET比表面積の変化を測定した。
内径40mmのステンレス製の円筒内に上記で作製した使用前の放射性セシウム吸着繊維を入れ、一定温度に温度を制御しながら油圧プレス機を用いて100kgf/cm2の圧力で加圧し、ペレット状試料を作製した。そして、加熱加圧工程前後の体積変化から、減容化率を求めた。その結果を下表に示す。
(4−1)非放射性セシウムを用いた試験
セシウム濃度5,000ppmの溶液1Lに50gの上記で作製した放射性セシウム吸着繊維を入れ、48時間震盪してセシウムを吸着させた。吸着後のセシウム濃度を測定したところ平衡濃度695ppmであり、放射性セシウム吸着繊維のセシウム吸着量は86.1mg/gであった。この放射性セシウム吸着繊維に真空乾燥を行い、繊維状試料とした。また、同じ放射性セシウム吸着繊維を400℃で加熱加圧工程を施し、ペレット状試料とした。そして、それぞれの試料について溶出試験を行い、溶液中に含まれる非放射性セシウム濃度を原子吸光光度計で測定し、溶出率を算出した。その結果を下表に示す。
上記で作製した放射性セシウム吸着繊維2kgをカラムに収容し、放射性セシウムを含む焼却灰を熱水抽出することにより得られた放射性セシウム濃度488Bq/kgの抽出水70Lを300分間循環させ、放射性セシウム吸着繊維に放射性セシウムを吸着させた。抽出水の放射性セシウムの最終平衡濃度は80Bq/kgであった。カラムから放射性セシウム吸着繊維を取り出し、表面を簡単に水で洗浄した後、繊維状試料とした。また、同じ放射性セシウム吸着繊維を400℃で加熱加圧工程を施し、ペレット状試料とした。そして、それぞれの試料について溶出試験を行い、溶液中に含まれる放射性セシウム濃度をGe半導体検出器で測定し、溶出率を算出した。その結果を下表に示す。
Claims (1)
- 多孔質粒子を担持した多孔質の高分子材料からなり放射性セシウムを吸着した放射性セシウム吸着繊維の減容化方法であって、前記放射性セシウム吸着繊維は前記高分子材料を溶解し前記多孔質粒子を分散させたポリマー溶液を水中に押し出すことによって得られたものであり、前記放射性セシウム吸着繊維を加熱しながら加圧する加熱加圧工程を備え、前記多孔質粒子はゼオライトであって、前記高分子材料はポリスルホンであり、前記加熱加圧工程は、250〜450℃で行われ、前記加熱加圧工程において、前記高分子材料が融解して放射性セシウムを細孔内に吸着した前記多孔質粒子の細孔を覆うことを特徴とする使用済み放射性セシウム吸着繊維の減容化方法。
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JP6524429B2 (ja) * | 2017-10-29 | 2019-06-05 | Hkテクノロジー株式会社 | 放射性廃棄物処理システム及び処理方法 |
KR102582976B1 (ko) * | 2019-11-07 | 2023-10-06 | 서강대학교산학협력단 | 제올라이트 복합체를 이용한 방사능 흡착 폐기물의 감용 방법 |
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US4762647A (en) * | 1985-06-12 | 1988-08-09 | Westinghouse Electric Corp. | Ion exchange resin volume reduction |
JP2523764B2 (ja) * | 1988-02-19 | 1996-08-14 | 日本碍子株式会社 | 固体廃棄物の圧縮減容処理方法 |
DE4323389A1 (de) * | 1993-07-13 | 1995-01-19 | Hoechst Ag | Modifizierte Acrylnitril Polymere, Verfahren zu deren Herstellung sowie deren Verwendung |
JPWO2013187505A1 (ja) * | 2012-06-14 | 2016-02-08 | 株式会社カサイ | 放射性セシウム吸着繊維及びその製造方法並びに放射性セシウム吸着繊維を用いた水中の放射性セシウム濃度の検出装置 |
JP2014000546A (ja) * | 2012-06-20 | 2014-01-09 | Oji Holdings Corp | 環境汚染物質除去用シートの処理方法 |
JP2014173868A (ja) * | 2013-03-06 | 2014-09-22 | Japan Vilene Co Ltd | カートリッジフィルタ |
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