JP2019522563A - 磁性セシウム吸着剤、その製造方法およびこれを用いたセシウム除去方法 - Google Patents
磁性セシウム吸着剤、その製造方法およびこれを用いたセシウム除去方法 Download PDFInfo
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- JP2019522563A JP2019522563A JP2019500288A JP2019500288A JP2019522563A JP 2019522563 A JP2019522563 A JP 2019522563A JP 2019500288 A JP2019500288 A JP 2019500288A JP 2019500288 A JP2019500288 A JP 2019500288A JP 2019522563 A JP2019522563 A JP 2019522563A
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- cesium
- hexacyanoferrate
- magnetic
- metal
- crystal structure
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- 229910052792 caesium Inorganic materials 0.000 title claims abstract description 115
- TVFDJXOCXUVLDH-UHFFFAOYSA-N caesium atom Chemical compound [Cs] TVFDJXOCXUVLDH-UHFFFAOYSA-N 0.000 title claims abstract description 107
- 238000000034 method Methods 0.000 title claims abstract description 15
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 14
- 239000003463 adsorbent Substances 0.000 title claims description 57
- UETZVSHORCDDTH-UHFFFAOYSA-N iron(2+);hexacyanide Chemical compound [Fe+2].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-] UETZVSHORCDDTH-UHFFFAOYSA-N 0.000 claims abstract description 109
- 229910052751 metal Inorganic materials 0.000 claims abstract description 59
- 239000002184 metal Substances 0.000 claims abstract description 59
- 239000013078 crystal Substances 0.000 claims abstract description 50
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 84
- 238000001027 hydrothermal synthesis Methods 0.000 claims description 69
- 239000000243 solution Substances 0.000 claims description 36
- 238000000926 separation method Methods 0.000 claims description 19
- 238000001179 sorption measurement Methods 0.000 claims description 18
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 17
- 239000002245 particle Substances 0.000 claims description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 14
- 229910021645 metal ion Inorganic materials 0.000 claims description 12
- -1 iron ion Chemical class 0.000 claims description 10
- 239000007864 aqueous solution Substances 0.000 claims description 8
- 125000004093 cyano group Chemical group *C#N 0.000 claims description 8
- 239000003446 ligand Substances 0.000 claims description 8
- 229910001453 nickel ion Inorganic materials 0.000 claims description 8
- 229910052742 iron Inorganic materials 0.000 claims description 5
- WAEMQWOKJMHJLA-UHFFFAOYSA-N Manganese(2+) Chemical compound [Mn+2] WAEMQWOKJMHJLA-UHFFFAOYSA-N 0.000 claims description 4
- 229910001437 manganese ion Inorganic materials 0.000 claims description 4
- 229910052799 carbon Inorganic materials 0.000 claims description 2
- 125000004432 carbon atom Chemical group C* 0.000 claims description 2
- 238000001035 drying Methods 0.000 claims description 2
- 229910052757 nitrogen Inorganic materials 0.000 claims description 2
- 125000004433 nitrogen atom Chemical group N* 0.000 claims description 2
- 229910052759 nickel Inorganic materials 0.000 description 37
- 239000011572 manganese Substances 0.000 description 20
- 229910052748 manganese Inorganic materials 0.000 description 17
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 16
- 239000002122 magnetic nanoparticle Substances 0.000 description 10
- 239000011734 sodium Substances 0.000 description 9
- 238000006243 chemical reaction Methods 0.000 description 8
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 6
- 229910001172 neodymium magnet Inorganic materials 0.000 description 6
- 230000008901 benefit Effects 0.000 description 5
- 239000002131 composite material Substances 0.000 description 5
- 238000001069 Raman spectroscopy Methods 0.000 description 4
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 4
- 238000002441 X-ray diffraction Methods 0.000 description 4
- 239000012153 distilled water Substances 0.000 description 4
- 238000001095 inductively coupled plasma mass spectrometry Methods 0.000 description 4
- 229910052723 transition metal Inorganic materials 0.000 description 4
- 150000003624 transition metals Chemical class 0.000 description 4
- VEQPNABPJHWNSG-UHFFFAOYSA-N Nickel(2+) Chemical compound [Ni+2] VEQPNABPJHWNSG-UHFFFAOYSA-N 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 230000004992 fission Effects 0.000 description 3
- 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 3
- 150000002736 metal compounds Chemical class 0.000 description 3
- 239000002243 precursor Substances 0.000 description 3
- 229960003351 prussian blue Drugs 0.000 description 3
- 239000013225 prussian blue Substances 0.000 description 3
- 230000035484 reaction time Effects 0.000 description 3
- 238000004611 spectroscopical analysis Methods 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 150000001768 cations Chemical class 0.000 description 2
- 238000005119 centrifugation Methods 0.000 description 2
- 229910017052 cobalt Inorganic materials 0.000 description 2
- 239000010941 cobalt Substances 0.000 description 2
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000002244 precipitate Substances 0.000 description 2
- 230000002285 radioactive effect Effects 0.000 description 2
- 238000004626 scanning electron microscopy Methods 0.000 description 2
- 239000011780 sodium chloride Substances 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 238000000527 sonication Methods 0.000 description 2
- 238000001228 spectrum Methods 0.000 description 2
- 238000003786 synthesis reaction Methods 0.000 description 2
- 229910001428 transition metal ion Inorganic materials 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 238000012790 confirmation Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 125000000524 functional group Chemical group 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 239000010808 liquid waste Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002086 nanomaterial Substances 0.000 description 1
- 230000005408 paramagnetism Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000000376 reactant Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- AWDBHOZBRXWRKS-UHFFFAOYSA-N tetrapotassium;iron(6+);hexacyanide Chemical compound [K+].[K+].[K+].[K+].[Fe+6].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-] AWDBHOZBRXWRKS-UHFFFAOYSA-N 0.000 description 1
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Abstract
Description
図2は、水熱反応前のニッケルヘキサシアノフェレートと、4時間水熱反応後のニッケルヘキサシアノフェレートのラマン分光分析結果を示すグラフである。
図3は、水熱反応前のニッケルヘキサシアノフェレートと、4時間水熱反応後のニッケルヘキサシアノフェレートのXRDパターン分析結果を示すグラフである。
図4は、水熱反応前のニッケルヘキサシアノフェレートと、4時間水熱反応後のニッケルヘキサシアノフェレートのSEM分析結果を示す写真である。
図5は、水熱反応前のニッケルヘキサシアノフェレートを含むセシウム吸着剤と、4時間、8時間および18時間水熱反応後のニッケルヘキサシアノフェレートを含むセシウム吸着剤の磁性特性を示す写真である。
本発明は、(a)金属ヘキサシアノフェレートを用意する段階と、(b)前記金属ヘキサシアノフェレートを水熱反応させて、菱面体結晶構造の金属ヘキサシアノフェレートを製造する段階とを含む磁性セシウム吸着剤の製造方法を提供する。
本発明は、菱面体結晶構造の金属ヘキサシアノフェレートを含む磁性セシウム吸着剤を提供する。
本発明は、前記磁性セシウム吸着剤を、セシウムイオンを含む溶液に分散させて、セシウムを吸着する段階と、磁石またはフィルターを用いてセシウムが吸着された磁性セシウム吸着剤を分離する段階とを含むセシウム除去方法を提供する。
セシウムの吸着率(%)=(分離前の溶液内セシウムの濃度−分離後の溶液内セシウムの濃度)/分離前の溶液内セシウムの濃度×100
実施例1
10mmolのNi(OCOCH3)2・4H2O 2.69gをH2O 175mlおよびDMF 25mlに溶かして、第1溶液を製造した。10mmolのNa4[Fe(CN)6]・10H2O 4.84gおよびNaCl 7gをH2O 175mlに溶かして、第2溶液を製造した。第1溶液を第2溶液にゆっくり加えた後、常温で72時間の間に撹拌して反応させた結果、沈殿物を遠心分離して回収し、メタノールで3回リンスした後、空気中で乾燥させて、立方体結晶構造のニッケルヘキサシアノフェレート(Na2Ni[Fe(CN)6])を製造した(図1参照)。
9.2mmolのMn(OCOCH3)2・4H2O 2.30gをH2O 50mlに溶かして、第1溶液を製造した。2.4mmolのNa4[Fe(CN)6]・10H2O 1.14gおよびNaCl 7gをH2O 200mlに溶かして、第2溶液を製造した。第1溶液を第2溶液にゆっくり加えた後、常温で72時間の間に撹拌して反応させた結果、沈殿物を遠心分離して回収し、メタノールで3回リンスした後、空気中で乾燥させて、立方体結晶構造のマンガンヘキサシアノフェレート(Na2Mn[Fe(CN)6])を製造した。
実施例1によって、4時間、8時間および18時間水熱反応後に、ニッケルヘキサシアノフェレートを含むセシウム吸着剤10mgを、ビーカー内25ppmセシウムイオンを含む溶液15mlに分散させた後、ネオジム磁石をビーカーの外部壁面に位置させた。
セシウムの吸着率(%)=(分離前の溶液内セシウムの濃度−分離後の溶液内セシウムの濃度)/分離前の溶液内セシウムの濃度×100
実施例2によって、水熱反応前のマンガンヘキサシアノフェレートを含むセシウム吸着剤10mgと、120℃および140℃の温度下に、4時間水熱反応後のマンガンヘキサシアノフェレートを含むセシウム吸着剤10mgを、それぞれ、ビーカー内25ppmセシウムイオンを含む溶液15mlに分散させた後、ネオジム磁石をビーカーの外部壁面に位置させた。
セシウムの吸着率(%)=(分離前の溶液内セシウムの濃度−分離後の溶液内セシウムの濃度)/分離前溶液内セシウムの濃度×100
Claims (13)
- (a)金属ヘキサシアノフェレートを用意する段階と、
(b)前記金属ヘキサシアノフェレートを水熱反応させて、菱面体(rhombohedral)結晶構造の金属ヘキサシアノフェレートを製造する段階と、を含む
磁性セシウム吸着剤の製造方法。 - 前記(a)において金属ヘキサシアノフェレートは、立方体(cubic)結晶構造である、
請求項1に記載の磁性セシウム吸着剤の製造方法。 - 前記(a)において金属ヘキサシアノフェレートにおいてシアノリガンドの炭素原子は、鉄イオンと6配位結合を形成し、シアノリガンドの窒素原子は、金属イオンと6配位結合を形成する、
請求項1に記載の磁性セシウム吸着剤の製造方法。 - 前記金属イオンは、ニッケルまたはマンガンイオンである、
請求項3に記載の磁性セシウム吸着剤の製造方法。 - 前記(b)において水熱反応は、120℃〜200℃の温度および2bar〜15bar圧力の下に、20分〜20時間の間に行われる、
請求項1に記載の磁性セシウム吸着剤の製造方法。 - 前記(b)において水熱反応後に、水または水溶液を除去し、乾燥させる段階をさらに含む、
請求項1に記載の磁性セシウム吸着剤の製造方法。 - 菱面体結晶構造の金属ヘキサシアノフェレートを含む磁性セシウム吸着剤。
- 前記菱面体結晶構造の金属ヘキサシアノフェレートにおいて金属イオンがニッケルイオンである場合、17、24、25、35、38.5、39.8、49.5、51、53.5、56.2および57.4 2θ(±0.2°)でXRDピークを有する、
請求項7に記載の磁性セシウム吸着剤。 - 前記菱面体結晶構造の金属ヘキサシアノフェレートにおいて金属イオンがマンガンイオンである場合、17、23.5、24.2、34.2、37.8、38.5、48.2、49.5、52.2、54.8および55.6 2θ(±0.2°)でXRDピークを有する、
請求項7に記載の磁性セシウム吸着剤。 - 前記菱面体結晶構造の金属ヘキサシアノフェレートの平均粒子サイズは、0.1μm〜1mmである、
請求項7に記載の磁性セシウム吸着剤。 - 前記菱面体結晶構造の金属ヘキサシアノフェレートは、固まり合ってクラスターを形成する、
請求項7に記載の磁性セシウム吸着剤。 - 請求項7に記載の磁性セシウム吸着剤を、セシウムイオンを含む溶液に分散させて、セシウムを吸着する段階と、磁石またはフィルターを用いてセシウムが吸着された磁性セシウム吸着剤を分離する段階と、を含む
セシウム除去方法。 - 下記数式1で表されるセシウムの吸着率は、90%以上である、
請求項12に記載のセシウム除去方法。
[数式1]
セシウムの吸着率(%)=(分離前の溶液内セシウムの濃度−分離後の溶液内セシウムの濃度)/分離前の溶液内セシウムの濃度×100
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