JP3290505B2 - Radionuclide adsorbent - Google Patents
Radionuclide adsorbentInfo
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- JP3290505B2 JP3290505B2 JP13303093A JP13303093A JP3290505B2 JP 3290505 B2 JP3290505 B2 JP 3290505B2 JP 13303093 A JP13303093 A JP 13303093A JP 13303093 A JP13303093 A JP 13303093A JP 3290505 B2 JP3290505 B2 JP 3290505B2
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- Prior art keywords
- adsorbent
- activated carbon
- fibrous activated
- oxidation
- group
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
- Carbon And Carbon Compounds (AREA)
- Inorganic Fibers (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は特定の物性を有する繊維
状活性炭からなり放射性廃液中の放射性核種を吸着する
ための放射性核種吸着材に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radionuclide adsorbent made of fibrous activated carbon having specific properties for adsorbing radionuclides in radioactive waste liquid.
【０００２】[0002]
【従来の技術】原子力発電所で発生する使用済み核燃料
を再処理する施設の各種廃液の中には、セシウムなどの
長寿命β、γ核種、ウラン、プルトニウムなどの放射性
核種が含まれている。これらの放射性廃液の処理におい
ては、被曝を低減するために廃液中の放射性核種を除去
し、放射線レベルを低下させる必要がある。2. Description of the Related Art Various kinds of wastewater from facilities for reprocessing spent nuclear fuel generated in nuclear power plants contain long-lived β and γ nuclides such as cesium, and radioactive nuclides such as uranium and plutonium. In the treatment of these radioactive waste liquids, it is necessary to remove radioactive nuclides in the waste liquid and reduce the radiation level in order to reduce exposure.
【０００３】従来、一般廃液中の金属の除去には、イオ
ン交換樹脂やキレート樹脂が使用されている。しかし、
放射性廃液の処理の場合、有機高分子からなるイオン交
換樹脂やキレート樹脂は放射線による化学的作用により
劣化しやすく使用できないという問題がある。Conventionally, ion-exchange resins and chelate resins have been used to remove metals from general waste liquids. But,
In the case of treating a radioactive waste liquid, there is a problem that ion exchange resins and chelate resins made of organic polymers are easily deteriorated due to chemical action by radiation and cannot be used.
【０００４】放射線に対する耐久性のある吸着材として
は無機系の吸着材が考えられるが、吸着性に優れたもの
は得られていないのが現状である。一方、有機系の母体
に無機系官能基を担持させた吸着材として、特公昭６３
−２４４１５号公報において、アクリル繊維にフェロシ
アン酸塩を担持した吸着材が提案されている。しかし、
母体が有機物のため耐久性には問題があった。[0004] As an adsorbent which is durable to radiation, an inorganic adsorbent can be considered, but at present there is no adsorbent excellent in adsorbability. On the other hand, as an adsorbent in which an inorganic base is supported on an organic base, it is known as JP-B-63
In Japanese Patent No. 24415, an adsorbent in which a ferrocyanate is supported on an acrylic fiber is proposed. But,
There was a problem in durability because the mother was organic.
【０００５】また、繊維状活性炭を放射性核種吸着材と
して使用するのは公知であるが、放射性核種のより良好
な吸着性を示す吸着材の限定は明確ではなかった。Although it is known to use fibrous activated carbon as a radionuclide adsorbent, the limitation of the adsorbent exhibiting better adsorption of radionuclides has not been clarified.
【０００６】[0006]
【発明が解決しようとする課題】上記のように、従来の
吸着材は、いずれも耐久性および吸着性に問題があっ
た。As described above, all of the conventional adsorbents have problems in durability and adsorbability.
【０００７】本発明はこのような課題を解決するもの
で、放射線に対して耐久性があり、かつ良好な放射性核
種の吸着を示す放射性核種吸着材を提供することを目的
とするものである。An object of the present invention is to provide a radionuclide adsorbent which is durable against radiation and exhibits good adsorption of radionuclides.
【０００８】[0008]
【課題を解決するための手段】本発明者らはこのような
課題を解決するために鋭意研究の結果、特定の物性を有
する無機系の骨格を持つ繊維状活性炭は放射線に対する
耐久性に優れ、しかも放射性廃液中に含まれる放射性核
種の良好な吸着を示すことを見い出して本発明に到達し
た。Means for Solving the Problems The present inventors have conducted intensive studies to solve such problems, and as a result, a fibrous activated carbon having an inorganic skeleton having specific physical properties has excellent durability against radiation, In addition, they have found that the present invention exhibits good adsorption of radionuclides contained in radioactive waste liquid, and arrived at the present invention.
【０００９】すなわち、本発明は下記の通りである。空
気酸化、オゾン酸化、液相酸化のいずれかの酸化処理も
しくはアミノメチルホスホン酸系以外の親水基を有する
官能基の添着処理が施された繊維状活性炭にて構成され
た吸着材であって、前記繊維状活性炭は、ＢＥＴ比表面
積が１２００ｍ2／ｇ以上であり、かつ相対湿度４５％
における平衡水分率が１５％以上であることを特徴とす
る放射性核種吸着材。That is, the present invention is as follows. Sky
Oxidation treatment of gas oxidation, ozone oxidation, liquid phase oxidation
Or a hydrophilic group other than aminomethylphosphonic acid
It is composed of fibrous activated carbon treated with functional groups.
And a adsorbent, the fibrous activated carbon is a BET specific surface area of 1200 m 2 / g or more and 45% relative humidity
A radionuclide adsorbent, characterized in that the equilibrium moisture content of the adsorbent is 15% or more.
【００１０】以下、本発明について詳細に説明する。本
発明の吸着材は、比表面積が１２００ｍ2 ／ｇ以上で相
対湿度４５％の平衡水分率が１５％以上の繊維状活性炭
吸着材であるが、吸着材を構成する繊維状活性炭の原料
は木材、椰子殻、石炭、タールピッチ、レーヨンやアク
リルなどの有機繊維のいずれでも良い。Hereinafter, the present invention will be described in detail. The adsorbent of the present invention is a fibrous activated carbon adsorbent having a specific surface area of 1200 m 2 / g or more and a relative humidity of 45% and an equilibrium moisture content of 15% or more. The raw material of the fibrous activated carbon constituting the adsorbent is wood. Any of organic fibers such as coconut shell, coal, tar pitch, rayon and acrylic may be used.
【００１１】またＢＥＴ比表面積としては液体窒素温度
で窒素ガス吸着等温線により、いわゆるＢＥＴ法により
求められるものである。本発明の繊維状活性炭の比表面
積は１２００ｍ2 ／ｇ以上が必要であり、好ましくは１
５００ｍ2 ／ｇ〜２５００ｍ 2 ／ｇである。１２００ｍ
2 ／ｇより小さい場合は吸着性能が低下する。The BET specific surface area is the temperature of liquid nitrogen.
By the nitrogen gas adsorption isotherm and the so-called BET method
It is required. Specific surface of the fibrous activated carbon of the present invention
The product is 1200mTwo / G or more, preferably 1
500mTwo / G ~ 2500m Two / G. 1200m
Two If it is less than / g, the adsorption performance is reduced.
【００１２】一般に活性炭は本来炭素を主体とするもの
であるからそれ自体は無極性であり、したがってその表
面は疎水性である。このため４５％程度の低い相対湿度
ではほとんど水分を吸着せず、平衡水分率は低いもので
ある。[0012] Generally, activated carbon is inherently mainly composed of carbon, and thus is itself nonpolar, and its surface is hydrophobic. Therefore, at a relative humidity as low as about 45%, almost no water is adsorbed, and the equilibrium moisture content is low.
【００１３】本発明の吸着材は、相対湿度４５％の平衡
水分率で１５％以上が必要であり、好ましくは２０％以
上である。１５％より小さい場合は吸着性能が低下す
る。相対湿度４５％における平衡水分率が１５％以上の
繊維状活性炭は、空気酸化、オゾン酸化、液相酸化、ま
たは親水性を有する官能基を添着することによって得る
ことができる。[0013] The adsorbent of the present invention requires an equilibrium moisture content of 45% or more at a relative humidity of 45%, and preferably 20% or more. If it is less than 15%, the adsorption performance will decrease. The fibrous activated carbon having an equilibrium moisture content of 15% or more at a relative humidity of 45% can be obtained by air oxidation, ozone oxidation, liquid phase oxidation, or by attaching a hydrophilic functional group.
【００１４】空気酸化としては温度３００℃〜７００
℃、好ましくは３５０℃〜６００℃の雰囲気で施せば良
い。３００℃未満になると酸化に要する時間が非常に長
くなり、７００℃を超えると燃焼反応が進んで繊維状活
性炭が減量する。酸化時間は温度と関係するが、１０分
間〜５時間が好ましい。また、加熱空気を流通させなが
ら空気酸化処理を施しても良い。The air oxidation is performed at a temperature of 300.degree.
C., preferably 350 ° C. to 600 ° C. If the temperature is lower than 300 ° C., the time required for oxidation becomes extremely long. If the temperature exceeds 700 ° C., the combustion reaction proceeds, and the amount of fibrous activated carbon is reduced. The oxidation time is related to the temperature, but is preferably from 10 minutes to 5 hours. Further, the air oxidation treatment may be performed while flowing heated air.
【００１５】オゾン酸化は繊維状活性炭をオゾン中で酸
化することによって行なう。この場合のオゾン濃度は１
００ｐｐｍ〜５００ｐｐｍ、特に２５０ｐｐｍ〜４５０
ｐｐｍが好ましい。オゾン濃度が１００ｐｐｍより低い
と酸化時間が長くなり、５００ｐｐｍより高いと繊維状
活性炭が減量する。Ozone oxidation is carried out by oxidizing fibrous activated carbon in ozone. The ozone concentration in this case is 1
00 ppm to 500 ppm, especially 250 ppm to 450
ppm is preferred. If the ozone concentration is lower than 100 ppm, the oxidation time is prolonged, and if it is higher than 500 ppm, the amount of fibrous activated carbon is reduced.
【００１６】次に、液相酸化は繊維状活性炭を酸化剤水
溶液中に浸漬し、数時間〜数日放置して行ない、ろ別
し、水洗後乾燥する。酸化剤としては、過マンガン酸
塩、クロム酸塩、次亜塩素酸塩、過硫酸塩、臭素酸イオ
ン、塩素、希硝酸、濃硝酸、および過酸化水素などが挙
げられる。Next, in the liquid phase oxidation, fibrous activated carbon is immersed in an oxidizing agent aqueous solution, left for several hours to several days, filtered, washed with water and dried. Examples of the oxidizing agent include permanganate, chromate, hypochlorite, persulfate, bromate ion, chlorine, dilute nitric acid, concentrated nitric acid, and hydrogen peroxide.
【００１７】また、繊維状活性炭に添着する官能基は、
アミノメチルホスホン酸系以外の親水性を有するもので
あれば特に限定されるものではないが、例えば水酸基、
カルボキシル基、カルボニル基、第一，第二，第三アミ
ノ基、あるいは第四級アンモニウム塩、スルホン酸基、
ホスホン酸基（アミノメチルホスホン酸系を除く）、エ
ステル基、アミド基、ニトロソ基、ニトロ基、チオール
基、シラノール基、セレノール基などが挙げられる。こ
れらの官能基は単独あるいは二種以上を組み合わせて添
着させても良い。[0017] In addition, the functional group to be affixed to the fibrous activated carbon,
Although it is not particularly limited as long as it has a hydrophilic property other than aminomethylphosphonic acid , for example, a hydroxyl group,
Carboxyl group, carbonyl group, primary, secondary, tertiary amino group, or quaternary ammonium salt, sulfonic acid group,
Examples include a phosphonic acid group (excluding an aminomethylphosphonic acid type) , an ester group, an amide group, a nitroso group, a nitro group, a thiol group, a silanol group, and a selenol group. These functional groups may be attached alone or in combination of two or more.
【００１８】繊維状活性炭へのこれら官能基の添着は、
官能基を有する低分子量化合物あるいは高分子量化合物
を添着する方法、官能基を有する低分子量化合物を添着
した後、添着した低分子量化合物を高分子量化する方
法、官能基を保有しない化合物を添着した後、官能基を
付加する方法、繊維状活性炭に官能基を直接付加する方
法などを採用することができる。The attachment of these functional groups to the fibrous activated carbon is as follows:
A method of attaching a low molecular weight compound having a functional group or a high molecular weight compound, a method of attaching a low molecular weight compound having a functional group, and a method of increasing the molecular weight of the attached low molecular weight compound, and a method of attaching a compound having no functional group. A method of adding a functional group, a method of directly adding a functional group to fibrous activated carbon, and the like can be employed.
【００１９】また、官能基を添着する際の繊維状活性炭
の形態は特に限定されるものではなく、原綿状、シート
状やカートリッジ状に成形されたものでも良い。なお、
官能基を添着すると、繊維状活性炭の比表面積は添着前
よりは小さくなるが、添着後においても１２００ｍ2 ／
ｇ以上必要である。The form of the fibrous activated carbon to which the functional group is attached is not particularly limited, and may be formed into a raw cotton, sheet, or cartridge. In addition,
When the functional group is attached, the specific surface area of the fibrous activated carbon becomes smaller than that before the attachment, but even after the attachment, 1200 m 2 /
g or more is required.
【００２０】[0020]
【実施例】次に、本発明を実施例により具体的に説明す
る。 実施例１ 繊維状活性炭（ユニチカ（株）製Ａ−２０；比表面積２
１１６ｍ2 ／ｇ）３ｇをあらかじめ６００℃に設定して
おいた電気炉（（株）池田理化製 MPC-400）で１０分間
酸化することによって酸化処理活性炭吸着材を得た。得
られた吸着材は、比表面積が２０７１ｍ2 ／ｇ、相対湿
度４５％における平衡水分率は５３％であった。Next, the present invention will be described in detail with reference to examples. Example 1 Fibrous activated carbon (A-20 manufactured by Unitika Ltd .; specific surface area 2)
3 g of 116 m 2 / g) was oxidized for 10 minutes in an electric furnace (MPC-400 manufactured by Ikeda Rika Co., Ltd.) preset at 600 ° C. to obtain an oxidized activated carbon adsorbent. The obtained adsorbent had a specific surface area of 2071 m 2 / g and an equilibrium moisture content at a relative humidity of 45% was 53%.
【００２１】得られた吸着材０．２５ｇを、プルトニウ
ム（Ｐｕ）濃度５．０×１０-3ｍｇ／ｍｌ、酸濃度１．
０ＮのＰｕ溶解液５０ｍｌ中に浸漬し、１２０時間吸着
処理を行なった。その結果、Ｐｕの吸着率は９６．１％
であった。The obtained adsorbent material (0.25 g) was subjected to a plutonium (Pu) concentration of 5.0 × 10 −3 mg / ml and an acid concentration of 1.
It was immersed in 50 ml of 0N Pu solution and subjected to an adsorption treatment for 120 hours. As a result, the adsorption rate of Pu was 96.1%.
Met.
【００２２】実施例２ ５リットルの硝子製ビーカーにフェノール９４ｇを採取
し、フェノールの温度を５０℃以下に保ちながら９８％
濃硫酸１７０ｇを攪拌しながら徐々に添加した。次に、
３７％ホルマリン９ｍｌを同様に添加した後、液温を７
０℃に上げて１時間反応させ、その後ただちに常温に冷
却した。この反応液８．７ｇを採取し、これに亜燐酸
２．１ｇ、イオン交換水０．７５ｇの混合液を攪拌しな
がら添加し、次に３７％ホルマリン９ｍｌを同様に添加
した。この液を、さらに水１５００ｍｌで希釈した後、
繊維状活性炭（ユニチカ（株）製Ａ−２０；比表面積２
１１０ｍ2 ／ｇ）３０ｇを添加して十分反応液と接触さ
せ、直ちにジエチレントリアミン１．２ｍｌを添加し
た。この液の温度を８０℃とし３時間反応させた後、残
液を分離除去した。さらに水洗した後、反応物を１２５
℃で２時間熱処理してアミノメチルホスホン酸系官能基
添着の繊維状活性炭を得た。この吸着材の上記の比表面
積は１２８０ｍ2 ／ｇ、相対湿度４５％における平衡水
分率は４１％であった。Example 2 94 g of phenol was collected in a 5-liter glass beaker, and 98% of the phenol was kept at a temperature of 50 ° C. or less.
170 g of concentrated sulfuric acid was gradually added with stirring. next,
After adding 9 ml of 37% formalin in the same manner, the liquid temperature was reduced to 7%.
The mixture was heated to 0 ° C. and reacted for 1 hour, and then immediately cooled to room temperature. 8.7 g of the reaction solution was collected, and a mixed solution of 2.1 g of phosphorous acid and 0.75 g of ion-exchanged water was added thereto with stirring, and then 9 ml of 37% formalin was similarly added. After further diluting this solution with 1500 ml of water,
Fibrous activated carbon (A-20 manufactured by Unitika Ltd .; specific surface area 2)
30 g of (110 m 2 / g) was added to sufficiently contact with the reaction solution, and immediately 1.2 ml of diethylenetriamine was added. After the temperature of the liquid was raised to 80 ° C. and the reaction was performed for 3 hours, the remaining liquid was separated and removed. After further washing with water, the reaction was
Heat treatment was performed at 2 ° C. for 2 hours to obtain fibrous activated carbon having an aminomethylphosphonic acid-based functional group. The specific surface area of the adsorbent was 1280 m 2 / g, and the equilibrium moisture content at a relative humidity of 45% was 41%.
【００２３】得られた吸着材０．２５ｇを用いる以外は
実施例１と同様にしてＰｕ溶解液の吸着処理を行なっ
た。その結果、Ｐｕの吸着率は８６．８％であった。A Pu solution was adsorbed in the same manner as in Example 1 except that 0.25 g of the obtained adsorbent was used. As a result, the Pu adsorption rate was 86.8%.
【００２４】比較例１ 吸着材として、比表面積９５０ｍ2 ／ｇ、発火点４８０
℃、相対湿度４５％における平衡水分率が３１％の繊維
状活性炭（ユニチカ（株）製Ａ−１０）を用いる以外は
実施例１と同様にしてＰｕ溶解液の吸着処理を行なっ
た。その結果、Ｐｕの吸着率は６０％に過ぎなかった。Comparative Example 1 The specific surface area was 950 m 2 / g and the ignition point was 480 as an adsorbent.
The adsorption treatment of the Pu solution was performed in the same manner as in Example 1 except that a fibrous activated carbon (A-10 manufactured by Unitika Ltd.) having an equilibrium moisture content of 31% at 45 ° C. and a relative humidity of 45% was used. As a result, the Pu adsorption rate was only 60%.
【００２５】比較例２ 繊維状活性炭（ユニチカ（株）製Ａ−２０；比表面積２
１１６ｍ2 ／ｇ）１０ｇを電気管状炉で７５ｍｌ／ｍｉ
ｎの流量で水素を流しながら、昇温速度３００℃／ｈ
ｒ、処理温度９００℃で１５分間還元処理し、還元処理
活性炭吸着材を得た。得られた吸着材は比表面積２０６
０ｍ2 ／ｇ、発火点４８０℃、相対湿度４５％における
平衡水分率が０．９％であった。Comparative Example 2 Fibrous activated carbon (A-20 manufactured by Unitika Ltd .; specific surface area 2)
116 m 2 / g) 10 g in an electric tube furnace at 75 ml / mi
n while flowing hydrogen at a flow rate of 300 ° C./h
r, a reduction treatment was performed at a treatment temperature of 900 ° C. for 15 minutes to obtain a reduction-treated activated carbon adsorbent. The obtained adsorbent has a specific surface area of 206.
The equilibrium moisture content at 0 m 2 / g, ignition point of 480 ° C, and relative humidity of 45% was 0.9%.
【００２６】得られた吸着材を用いる以外は実施例１と
同様にしてＰｕ溶解液の吸着処理を行なった。その結
果、Ｐｕの吸着率は５０％に過ぎなかった。Except that the obtained adsorbent was used, the Pu solution was adsorbed in the same manner as in Example 1. As a result, the adsorption rate of Pu was only 50%.
【００２７】比較例３ ５リットルの硝子製ビーカーに水１５００ｇとフェノー
ル２．８２ｇを加え、この水溶液中に繊維状活性炭（ユ
ニチカ（株）製Ａ−２０；比表面積２１１０ｍ 2 ／ｇ）
３０ｇを添加して５０℃で１時間浸漬した。次に９８％
濃硫酸５．１ｇとイオン交換水４５ｇの混合液を添加
し、さらに亜燐酸２．１ｇ、イオン交換水０．７５ｇの
混合液を添加し５０℃で３０分反応させた。次に３７％
ホルマリン９ｍｌを添加し、５０℃で１時間反応させ、
さらにジエチレントリアミン１．２ｍｌを添加し、温度
を８０℃として３時間反応させた後、残液を分離除去し
た。さらに水洗した後、反応物を１２５℃で２時間熱処
理して添着繊維状活性炭吸着材を得た。得られた吸着材
の比表面積は１８６２ｍ2 ／ｇ、相対湿度４５％におけ
る平衡水分率は８％であった。Comparative Example 3 In a 5-liter glass beaker, 1500 g of water and phenol were added.
2.82 g of toluene, and fibrous activated carbon (U
A-20 manufactured by Nichika Corporation; specific surface area 2110 m Two / G)
30 g was added and immersed at 50 ° C. for 1 hour. Then 98%
Add a mixture of 5.1 g of concentrated sulfuric acid and 45 g of ion-exchanged water
And 2.1 g of phosphorous acid and 0.75 g of ion-exchanged water.
The mixture was added and reacted at 50 ° C. for 30 minutes. Then 37%
9 ml of formalin was added and reacted at 50 ° C. for 1 hour.
Further, 1.2 ml of diethylenetriamine was added, and the temperature was lowered.
Was reacted at 80 ° C. for 3 hours, and the remaining liquid was separated and removed.
Was. After further washing with water, the reaction was heat treated at 125 ° C. for 2 hours.
Thus, an impregnated fibrous activated carbon adsorbent was obtained. Obtained adsorbent
Has a specific surface area of 1,862mTwo / G, at 45% relative humidity
The equilibrium moisture content was 8%.
【００２８】得られた吸着材を用いる以外は実施例１と
同様にしてＰｕ溶解液の吸着処理を行なった。その結
果、Ｐｕの吸着率は６６％に過ぎなかった。Except that the obtained adsorbent was used, the Pu solution was adsorbed in the same manner as in Example 1. As a result, the Pu adsorption rate was only 66%.
【００２９】[0029]
【発明の効果】以上のように本発明の吸着材は、無機系
の骨格を持つ繊維状活性炭に酸化処理などを施すことに
よって親水性にしているため、放射線に対して耐久性が
あり、かつ放射性核種を良好に吸着することができる。
しかも繊維状であるため、シート、カートリッジ、成形
品などに容易に成形することができる。As described above, since the adsorbent of the present invention is made hydrophilic by subjecting the fibrous activated carbon having an inorganic skeleton to an oxidation treatment or the like, it is durable against radiation, and Radionuclide can be adsorbed well.
Moreover, since it is fibrous, it can be easily formed into sheets, cartridges, molded products, and the like.
【００３０】また、本発明の吸着材と繊維状活性炭を併
用して放射性廃液を処理すれば、その相乗効果により吸
着率の向上を図ることができる。Further, if the radioactive waste liquid is treated by using the adsorbent of the present invention and fibrous activated carbon in combination, the adsorption rate can be improved by the synergistic effect.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 中野 岳 茨城県那珂郡東海村白方字白根２番地の ４ 日本原子力研究所東海研究所内 (72)発明者 森 忠弘 京都府宇治市宇治小桜23番地 ユニチカ 株式会社中央研究所内 (72)発明者 高橋 英樹 京都府宇治市宇治小桜23番地 ユニチカ 株式会社中央研究所内 (56)参考文献 特開 平５−168917（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) B01J 20/00 - 20/34 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Takeshi Nakano 2 Shirane, Shirakata, Tokai-mura, Naka-gun, Ibaraki Pref. Unitika Central Research Laboratory Co., Ltd. (72) Inventor Hideki Takahashi 23 Uji Kozakura, Uji City, Kyoto Prefecture Unitika Central Research Laboratory Co., Ltd. (56) References JP-A-5-168917 (JP, A) (58) Int.Cl. 7 , DB name) B01J 20/00-20/34
Claims (1)
れかの酸化処理もしくはアミノメチルホスホン酸系以外
の親水基を有する官能基の添着処理が施された繊維状活
性炭にて構成された吸着材であって、前記繊維状活性炭
は、ＢＥＴ比表面積が１２００ｍ2／ｇ以上であり、か
つ相対湿度４５％における平衡水分率が１５％以上であ
ることを特徴とする放射性核種吸着材。1. Any of air oxidation, ozone oxidation and liquid phase oxidation
Other than oxidation treatment or aminomethylphosphonic acid
Fibrous active material to which a functional group having a hydrophilic group is attached
An adsorbent made of charcoal, wherein the fibrous activated carbon is
Is a radionuclide adsorbent characterized by having a BET specific surface area of 1200 m 2 / g or more and an equilibrium moisture content at a relative humidity of 45% of 15% or more.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13303093A JP3290505B2 (en) | 1993-06-03 | 1993-06-03 | Radionuclide adsorbent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13303093A JP3290505B2 (en) | 1993-06-03 | 1993-06-03 | Radionuclide adsorbent |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06343856A JPH06343856A (en) | 1994-12-20 |
| JP3290505B2 true JP3290505B2 (en) | 2002-06-10 |
Family
ID=15095167
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13303093A Expired - Fee Related JP3290505B2 (en) | 1993-06-03 | 1993-06-03 | Radionuclide adsorbent |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3290505B2 (en) |
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|---|---|---|---|---|
| JP4860133B2 (en) * | 2004-10-07 | 2012-01-25 | 積水化学工業株式会社 | Method for analyzing glycated hemoglobin |
| JP5766028B2 (en) * | 2011-04-13 | 2015-08-19 | 相部 紀夫 | Radiocesium adsorption method |
| EP2698348A4 (en) * | 2011-04-15 | 2015-04-22 | Environment Energy Nano Technical Res Inst | Apparatus for producing carbon nanomaterial, and use thereof |
| JP5872186B2 (en) * | 2011-05-16 | 2016-03-01 | 相部 紀夫 | Production method of radioactive metal adsorbent and adsorption method of radioactive metal |
| JP2013202594A (en) * | 2012-03-29 | 2013-10-07 | Osaka Gas Co Ltd | Metallic ion adsorbent and method of removing metallic ion using the same |
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1993
- 1993-06-03 JP JP13303093A patent/JP3290505B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06343856A (en) | 1994-12-20 |
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