JP2012237735A - 放射性物質類除染システム、及び放射性物質類の除染方法、及び除染用磁性複合粒子 - Google Patents
放射性物質類除染システム、及び放射性物質類の除染方法、及び除染用磁性複合粒子 Download PDFInfo
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Abstract
【解決手段】本発明に係る放射性物質類除染システムは、放射性物質類を液体中で捕捉する除染用磁性複合粒子1と、液体中において、除染用磁性複合粒子1を集積する磁力集積手段30とを備える。除染用磁性複合粒子1は、コア部に磁性ナノ粒子10、表層に液体中の放射性物質類を捕捉する捕捉性化合物18、及び、磁性ナノ粒子10を直接被覆し、磁性ナノ粒子10と捕捉性化合物18の間に実質的に形成されている被覆層15の多層構造からなる。
【選択図】図3C
Description
本発明に係る放射性物質類除染システムについて、図1〜図3Dを用いつつ説明する。図1は、第1実施形態に係る放射性物質類の除染方法のフローチャート図である。図2Aは、第1実施形態に係る除染用磁性複合粒子の模式的説明図であり、図2Bは、除染用磁性複合粒子の一部分解図であり、図2Cは、図2AのIIC−IIC切断部断面図である。また、図2D〜図2Iは、除染用磁性複合粒子の磁性ナノ粒子がクラスターを形成している場合の説明図等を示す。図3A〜図3Dは、第1実施形態に係る放射性物質類除染システムの説明図である。
次に、上記実施形態とは異なる放射性物質類の除染方法の一例について説明する。第2実施形態に係る放射性物質類の除染方法は、以下の点を除く基本的な方法は上記第1実施形態と同様である。すなわち、第2実施形態に係る放射性物質類の除染方法は、除染用磁性複合粒子の回収方法が第1実施形態と相違する。第1実施形態においては、放射性物質類を含む液体内に磁力集積手段を直接、浸漬して引き上げていたが、第2実施形態においては、磁性ナノ粒子を捕捉できるフィルターにより除染用磁性複合粒子を回収している点において相違する。
第3実施形態に係る放射性物質類の除染方法は、以下の点を除く基本的な構成は上記第2実施形態と同様である。すなわち、第3実施形態に係る放射性物質類の除染方法は、フィルター吸着物剥離手段を具備している点において、これを有しない第2実施形態とは相違する。
第4実施形態に係る放射性物質類の除染方法は、以下の点を除く基本的な構成は上記第1実施形態と同様である。すなわち、第4実施形態に係る放射性物質類の除染方法は、除染用磁性複合粒子が、上記第1実施形態と相違する。
第5実施形態に係る放射性物質類の除染方法は、以下の点を除く基本的な構成は上記第1実施形態と同様である。すなわち、第5実施形態に係る放射性物質類の除染方法は、除染用磁性複合粒子が、上記第1実施形態と相違する。
(実施例1)
<酸化鉄微粒子の調製> 7.95gの塩化第一鉄(II)・四水和物を8mlの純水に溶解した。次いで、21.62gの塩化第二鉄(III)・六水和物を8mlの純水に溶解した。そして、これらを混合し、総量が50mlになるように、純水を加えた。次いで、この水溶液を攪拌しながら、アンモニア水(25%)を加え、磁性スラリーを得た。
<酸化鉄微粒子の調製> 0.02モルの塩化第一鉄(II)(和光純薬社製)、0.04モルの塩化第二鉄(III)(和光社製)を、25mlの純水に溶解した。次いで、アルゴン・ガスの下で、25mlのアンモニア水(25%)を加え、黒色の磁性スラリーを得た。得られた磁性スラリーは、10分間3000Gで遠心分離を行い、塩化アンモニウムの副産物を除去するために35mlの純水で10回洗浄した。
上記実施例5のイライトをゼオライトに変えて同様の実験を行った。具体的には、ゼオライト顆粒1グラムを乳鉢でよくすりつぶした。得られたゼオライト粉末0.5グラムを、50mlポリプロピレン製コニカルチューブに入れた純水50mlに加え、よく攪拌した。5分間静置後、上澄み5mlを採取した。粒径、ゼータ電位を測定したところ、約200nm、−35〜−50mV(pH4〜10)であった。
10 磁性ナノ粒子
12 磁性籠状骨格
13 中空構造
14 空隙
15 被覆層
18 捕捉性化合物
20 放射能汚染水
21 放射性セシウム(放射性物質類)
25 塩化セシウム
30 磁力集積手段
31 磁石
32 シールド手段
33 ケーシング
41 磁性フィルター
42 磁気制御部
43 浄化管
44 支持部
45 磁性金網
46 空隙部
47 接合部
48 超音波照射手段
50 捕捉回収装置
51 シリンジ
52 磁気フィルター
53 ネオジウム磁石
60 ガラスバイアル
61 分散液
62 磁気回路
Claims (20)
- 放射性物質類除染システムであって、
放射性物質類を液体中で捕捉する除染用磁性複合粒子と、
前記液体中の前記除染用磁性複合粒子を集積する磁力集積手段と、を備え、
前記除染用磁性複合粒子は、
コア部に磁性ナノ粒子、
表層に前記液体中の前記放射性物質類を捕捉する捕捉性化合物、
及び、前記磁性ナノ粒子を直接被覆し、前記磁性ナノ粒子と前記捕捉性化合物の間に実質的に形成されている被覆層の多層構造からなる放射性物質類除染システム。 - 前記被覆層は、脂質、界面活性剤、高分子、無機物により形成されていることを特徴とする請求項1に記載の放射性物質類除染システム。
- 前記磁性ナノ粒子は、クラスターを形成していることを特徴とする請求項1又は2に記載の放射性物質類除染システム。
- 前記被覆層と前記捕捉性化合物は、静電結合、若しくは共有結合により結合されていることを特徴とする請求項1〜3のいずれか1項に記載の放射性物質類除染システム。
- 前記磁性ナノ粒子はFe,Co、Niのいずれかを少なくとも一部に含むものであることを特徴とする請求項1〜4のいずれか1項に記載の放射性物質類除染システム。
- 前記磁力集積手段は、磁力のON−OFF制御が可能であって、前記液体中にある前記放射性物質類を前記磁力集積手段の磁力により集積し、集積後に前記磁力集積手段から前記放射性物質類を分離する構成を備えていることを特徴とする請求項1〜5のいずれか1項に記載の放射性物質類除染システム。
- 前記捕捉性化合物は、金属フェロシアン化物、ゼオライト、イオン交換体、ナノ多孔材料のいずれかであることを特徴とする請求項1〜6のいずれか1項に記載の放射性物質類除染システム。
- 前記放射性物質類は、放射性セシウム、及び非放射性セシウムであることを特徴とする請求項1〜7のいずれか1項に記載の放射性物質類除染システム。
- 前記磁性ナノ粒子及び前記被覆層が形成された被覆性磁性ナノ粒子と、前記捕捉性化合物とを、別々に前記液体中に投入し、当該液体中で前記除染用磁性複合粒子を形成することを特徴とする請求項1〜8のいずれか1項に記載の放射性物質類除染システム。
- 前記磁力集積手段は、磁力のON−OFF制御が可能であって、前記放射性物質類を含む液体を濾過して、前記放射性物質類を捕獲する磁性フィルターを具備することを特徴とする請求項1〜9のいずれか1項に記載の放射性物質類除染システム。
- 前記磁性ナノ粒子は、内部に中空を有する籠状骨格を成していることを特徴とする請求項1〜10のいずれか1項に記載の放射性物質類除染システム。
- 前記捕捉性化合物は、フェロシアン化鉄、フェロシアン化ニッケル、又はフェロシアン化コバルトのいずれかであることを特徴とする請求項1〜11のいずれか1項に記載の放射性物質類除染システム。
- 前記液体は、海水、河川、湖、池、貯水槽、雨水、地下水、雪解け水、汚染土壌を含む土壌水、汚染した塵の分散水、汚染した埃の分散水、汚染がれき洗浄水、装置洗浄水、機械洗浄水、輸送手段の洗浄水、上水道への供給水、中水道への供給水、下水道から集められた水、下水汚泥、浄水汚泥、放射性物質類を含む焼却灰の分散水、飲料水、母乳、血清、体液、動物・植物・微生物由来の水分・汚染水・洗浄水のいずれかであることを特徴とする請求項1〜12のいずれか1項に記載の放射性物質類除染システム。
- 液体中の放射性物質類の除染方法であって、
(i)コア部に磁性ナノ粒子、
表層に前記液体中の前記放射性物質類を捕捉する捕捉性化合物、
及び、前記磁性ナノ粒子を直接被覆し、前記磁性ナノ粒子と前記捕捉性化合物の間に実質的に形成されている被覆層を有する除染用磁性複合粒子を前記液体中に投入し、若しくは、(ii)前記磁性ナノ粒子及び前記被覆層が形成された被覆性磁性ナノ粒子と、前記捕捉性化合物とを、別々に前記液体中に投入して当該液体中で前記除染用磁性複合粒子を形成させ、
前記除染用磁性複合粒子により、前記液体中にある前記放射性物質類を捕捉し、
その後、磁力集積手段を利用して前記液体中から前記除染用磁性複合粒子を回収する放射性物質類の除染方法。 - 前記磁力集積手段は、前記液体に対して磁力のON−OFF制御が可能な磁石を具備し、前記放射性物質類を前記磁力集積手段によって集積後、当該磁力集積手段から前記放射性物質類を分離する分離回収手段を具備していることを特徴とする請求項14に記載の放射性物質類の除染方法。
- さらに、前記分離回収手段は、遠心分離工程を備えることを特徴とする請求項15に記載の放射性物質類の除染方法。
- 前記磁力集積手段は、磁性フィルターと、前記磁性フィルターに対して磁気を照射する磁気照射手段を具備し、前記放射性物質類を前記磁性フィルターに集積することを特徴とする請求項14〜16のいずれか1項に記載の放射性物質類の除染方法。
- 前記磁性フィルターから前記放射性物質類を分離回収するために、前記磁性フィルター吸着物剥離のための物理的エネルギーを加えながら行うステップを含むことを特徴とする請求項17に記載の放射性物質類の除染方法。
- 前記物理的エネルギーは、加熱手段、超音波印加手段、超音波よりも周波数の小さな機械的振動印加手段、衝撃波印加手段、圧力調整手段、活性光線照射手段の少なくともいずれかであることを特徴とする請求項18に記載の磁性ナノ粒子回収の方法。
- 請求項1〜13のいずれか1項に記載の放射性物質類除染システムに用いられる放射性物質類を捕捉可能な除染用磁性複合粒子であって、
前記除染用磁性複合粒子は、
コア部に磁性ナノ粒子、
表層に前記液体中の前記放射性物質類を捕捉する捕捉性化合物、
及び、前記磁性ナノ粒子を直接被覆し、前記磁性ナノ粒子と前記捕捉性化合物の間に実質的に形成されている被覆層を有する除染用磁性複合粒子。
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JP4932054B1 (ja) | 2012-05-16 |
WO2012147266A1 (ja) | 2012-11-01 |
EP2704154B1 (en) | 2016-12-14 |
JP2012237738A (ja) | 2012-12-06 |
EP2704154A4 (en) | 2014-11-12 |
JP5991508B2 (ja) | 2016-09-14 |
CN103548094B (zh) | 2016-03-30 |
EP2704154A1 (en) | 2014-03-05 |
CN103548094A (zh) | 2014-01-29 |
TWI547956B (zh) | 2016-09-01 |
KR20140045357A (ko) | 2014-04-16 |
RU2602272C2 (ru) | 2016-11-20 |
JP2012237740A (ja) | 2012-12-06 |
US20140042068A1 (en) | 2014-02-13 |
RU2013152745A (ru) | 2015-06-10 |
TW201248650A (en) | 2012-12-01 |
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