KR20190090521A - Radioactive cesium absorbent and method of the same - Google Patents

Abstract

The present invention relates to a cesium adsorbent for removing cesium, which is a radioactive substance remaining in contaminated water. The cesium adsorbent according to an embodiment of the present invention comprises: a porous hydrogel including micropores and dispersed in water; and Prussian blue adsorbed to the micropores.

Description

Cesium adsorbent and its preparation method {Radioactive cesium absorbent and method of the same}

The present invention relates to a cesium adsorbent and a method for manufacturing the same, and a cesium adsorbent for removing cesium, which is a radioactive substance remaining in radioactive contaminated water, and a method for producing the same. According to the present invention, there is an advantage that can separate the cesium spilled into the sea water.

The Japanese earthquake in March 2011 destroyed a nuclear power plant, and large amounts of iodine and cesium were found in high concentrations in seawater and groundwater **. Such radioactive contamination can directly damage humans and land animals and plants, and also contaminate groundwater flowing through the soil, which can adversely affect the entire environment such as the marine environment and the atmosphere, and thus requires special treatment.

In general, the method of treating radioactive contamination is to measure the radioactive contamination, and then transfer the radioactive pollutants to a radioactive waste treatment plant for long-term storage or to remove radionuclides according to the measured radioactive contamination.

In addition, radionuclide wastewater is considered a radioactive waste, even if it contains very low concentrations of radioactive material, requiring very difficult management and treatment procedures.

As a liquid radioactive waste treatment method such as radionuclide wastewater, evaporation method, membrane filtration method, ion exchange method and the like are used as conventional techniques. However, the evaporation method has a disadvantage in that all moisture is evaporated and the remaining wastes must be treated. The membrane filtration method and the ion exchange method are non-selective treatment methods, which simultaneously remove non-radioactive salts such as sodium, calcium, and iron present with radionuclides. Since the concentration of the radionuclide material is very low in comparison with these non-radioactive salts, it is expensive to remove the non-radioactive material and has a disadvantage of low economic efficiency.

Published Patent Publication No. 10-2005-0120312

Radioactive liquid wastes are liquid wastes generated during nuclear power generation and include fission products and active elements containing extremely dangerous radioisotopes such as radioactive iodine, radioactive cesium, radioactive strontium and radioactive cerium.

As a technique for treating radioactive cesium, various methods are used. Among them, the method of treating radioactive cesium using adsorption is easy to process and can be operated at low temperature. Although various studies have been made on radioactive cesium adsorbents, further research and development of adsorbents having higher selectivity and adsorption to radioactive cesium are needed.

Accordingly, an object of the present invention is to provide a cesium adsorbent for removing cesium, which is a radioactive substance remaining in radioactive contaminated water, and a method of manufacturing the same.

Other objects and advantages of the present invention will become more apparent from the following detailed description of the invention, claims and drawings.

The cesium adsorbent for removing cesium, which is a radioactive substance remaining in contaminated water, according to an embodiment of the present invention for achieving the problem to be solved, includes a porous hydrogel dispersed in water and the micropores, It may include adsorbed Prussian Blue.

The porous hydrogel is any one of collagen, gelatin, fibrin, alginic acid, hyaluronic acid, chitosan, polyacrylamide, polyacrylic acid, polyethylene oxide, polyvinyl alcohol and polyphosphazene.

According to another aspect of the present invention, there is provided a method for preparing a cesium adsorbent for removing cesium, which is a radioactive substance remaining in contaminated water, comprising: a) a porous hydrogel containing micropores and dispersed in water. And b) absorbing a solution comprising K ₃ [Fe (CN) ₆ ] in the micropores of the porous hydrogel; and c) FeCl the porous hydrogel after the b) step. ₃ may be immersed in a solution and heated to form Prussian Blue.

The Prussian Blue is adsorbed to the micropores.

Providing the porous hydrogel includes forming a porous hydrogel by adding a crosslinking agent, a monomer for preparing a hydrogel, and an initiator to a reaction solvent.

The reaction solvent is aqueous, saturated hydrocarbon (hexane, pentane, petroleum ether), aromatic hydrocarbon (benzene, toluene, xylene), alcohol (methanol, ethanol, benzyl alcohol), ketone (acetone, methyl ethyl ketone , Methyl butyl ketone, cyclohexanone), ester type (methyl acetate, ethyl acetate, etc.), ether type (diethyl ether, isopropyl ether, THR, dioxane), amide type (dimethylformamide, diethylformamide) , Sulfoxide-based (dimethylsulfoxide, sulfolane), organic acid (formic acid, acetic acid, propionic acid), acetnitrayl and tetralin.

The crosslinking agent is glutaraldehyde, N, N'-methylene-bis-acrylamide (N, N'-methylene-bis-acrylamide, BIS), N, N, N ', N'-tetramethyl ethylene Diamine (N, N, N ', N'-tetramethyl ethylene diamine), at least one selected from ethylene glycol dimethacrylate (ethylene glycol dimethacrylate).

The monomer may be acrylamide (Am), acrylic acid (AA), HA, alginic acid, pectin, carrageenan, chondroitin sulfate, dextransulfate ( dextran sulfate, chitosan, polylysine, collagen, carboxyethyl chitin, fibrin, dextran, agarose, pullulan , PEG-PLA-PEG, PEG-PLGA-PEG, PEG-PCL-PEG, PLA-PEG-PLA, PHB, P (PEG / PBO) terephthalate, PEG-bis- (PLA-acrylate), PEG-gP (AAm -co-Vamine), PAAm, P (NIPAAm-co-AAc), P (NIPAAm-co-EMA), PVAc / PVA, PNVP, P (MMA-co-HEMA), P (AN-co-ally sulfate) , P (bisscrboxy-phenoxy-phosphazene), P (GEMA-sulfate), P (PEG-co-peptides), alginate-g- (PEO-PPO-PEO), P (PLGA-co-serine), collagen-acrylate , P (HPMA-g-peptide), P (HEMA / Materigel), and HA-g-NIPAAm.

The initiator is, ammonium persulfate (APS), acetyl peroxide, benzoyl peroxide, diacyl peroxide, cumene hydroperoxide, alkyl peroxide, potassium peroxide, ammonium peroxide, ammonium peroxide, azobisisoiso Butyronitrile (azobisisobutyronitrile (AIBN), azobiscyclohexanecarbonyl, tetramethylthiuram disulfide, dibenzoyldisulfide, P-toluolsulfinic acid, alkanesulfinic acid.

Step c) is carried out in a temperature atmosphere of 40 ℃ ~ 200 ℃.

The features and advantages of the present invention are summarized as follows. There is provided a cesium adsorbent and a method for producing the cesium blue which can be uniformly dispersed in an aqueous solution by a porous hydrogel, and can selectively absorb cesium, which is a radioactive substance remaining in contaminated water.

1 is a photograph of a cesium adsorbent according to an embodiment of the present invention.
2 is a flowchart illustrating a method of preparing a cesium adsorbent according to an embodiment of the present invention.
3 and 4 are photographs showing the manufacturing process of the cesium adsorbent.
5 is a SEM, TEM electron micrograph of the cesium adsorbent prepared by the above production method.
6 is an X-ray diffraction spectroscopy (XRD) -pattern of cesium adsorbent prepared.

Advantages and features of the present invention and methods for achieving them will be apparent with reference to the embodiments described below in detail with the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as being limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. Is provided to fully convey the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims. DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. &Quot; and / or "include each and every combination of one or more of the mentioned items. ≪ RTI ID = 0.0 >

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. In the present specification, the singular form includes plural forms unless otherwise specified in the specification. The terms " comprises "and / or" comprising "used in the specification do not exclude the presence or addition of one or more other elements in addition to the stated element.

Unless defined otherwise, all terms (including technical and scientific terms) used herein may be used in a sense commonly understood by one of ordinary skill in the art to which this invention belongs. Also, commonly used predefined terms are not ideally or excessively interpreted unless explicitly defined otherwise.

Hereinafter, a cesium (Cs) adsorbent and a method for preparing the same according to embodiments of the present invention will be described.

First, Figure 1 is a photograph of a cesium adsorbent according to an embodiment of the present invention. Referring to FIG. 1, the cesium adsorbent 10 according to the embodiment of the present invention includes a porous hydrogel 100 and a micropore 102 including a support structure 101 and a micropore 102 made of a polymer material. It may include Prussian Blue adsorbed on. The hydrogel here has a water-soluble property of being dispersed in water.

More specifically, a hydrogel is a material in which a hydrophilic polymer capable of swelling in water has a three-dimensional network structure and is physically or chemically crosslinked and is not dissolved in an aqueous solution and an aqueous environment by a crosslinking structure. Its inherent hydrophilicity absorbs large amounts of water and swells. The three-dimensional network structure of the hydrogel may be formed by various factors such as covalent bonds, hydrogen bonds, Van der Waals bonds or physical aggregation. In addition, various polymer hydrogels react sensitively to external stimuli such as temperature, pH, solvent composition, ion concentration, electric field, light intensity, chemicals, etc., and exhibit changes in physical properties such as water content continuously or discontinuously.

The porous hydrogel 100 may be any one of collagen, gelatin, fibrin, alginic acid, hyaluronic acid, chitosan, polyacrylamide, polyacrylic acid, polyethylene oxide, polyvinyl alcohol, and polyphosphazene.

Prussian Blue particles are dispersed and adsorbed in the micropores 102 of the porous hydrogel 100. Prussian blue is a material having excellent cesium selectivity, and can be selectively adsorbed with cesium contained in contaminated water. By selectively adsorbing cesium and Prussian blue, cesium contained in the contaminated water can be removed. That is, the radioactive cesium in the radioactive liquid waste can be adsorbed and separated.

Subsequently, a method of preparing a cesium adsorbent according to another embodiment of the present invention will be described with reference to FIGS. 1 to 4.

2 is a flowchart illustrating a method of preparing a cesium adsorbent according to an embodiment of the present invention, and FIGS. 3 and 4 are photographs showing a process of preparing a cesium adsorbent.

Cesium adsorbent for removing cesium, which is a radioactive substance remaining in the contaminated water, a method for producing a cesium adsorbent comprising a) microporous, dispersed in water, and b) the micropores of the porous hydrogel Absorbing a solution containing K ₃ [Fe (CN) ₆ ], and c) immersing the porous hydrogel passed through step b) in a FeCl ₃ solution and applying heat to Prussian Blue. It may include forming a.

First, to provide a porous hydrogel containing micropores in order to prepare a cesium adsorbent (S10).

In the providing of the porous hydrogel 100, a porous hydrogel may be prepared by adding a crosslinking agent, a monomer for preparing a hydrogel, and an initiator to a reaction solvent.

In order to prepare the porous hydrogel 100, a reaction solvent is prepared. The reaction solvent is aqueous, saturated hydrocarbon (hexane, pentane, petroleum ether), aromatic hydrocarbon (benzene, toluene, xylene), alcohol (methanol, ethanol, benzyl alcohol), ketone (acetone, methyl ethyl ketone, Methyl butyl ketone, cyclohexanone), ester type (methyl acetate, ethyl acetate, etc.), ether type (diethyl ether, isopropyl ether, THR, dioxane), amide type (dimethylformamide, diethylformamide), It may be any one selected from the group consisting of sulfoxide type (dimethyl sulfoxide, sulfolane), organic acid (formic acid, acetic acid, propionic acid), acetnitrayl and tetralin.

Subsequently, a crosslinking agent can be added to the reaction solvent. The crosslinking agent is glutaraldehyde, N, N'-methylene-bis-acrylamide (N, N'-methylene-bis-acrylamide, BIS), N, N, N ', N'-tetramethyl ethylenediamine One or a mixture of two or more selected from (N, N, N ', N'-tetramethyl ethylene diamine) and ethylene glycol dimethacrylate may be used, but is not limited thereto.

Subsequently, a monomer for forming the main body of the porous hydrogel 100 may be added to the reaction solvent. Monomers include acrylamide (Am), acrylic acid (AA), HA, alginic acid, pectin, carrageenan, chondroitin sulfate, dextransulfate sulfate, chitosan, polylysine, collagen, carboxyethyl chitin, fibrin, dextran, agarose, pullulan, PEG-PLA-PEG, PEG-PLGA-PEG, PEG-PCL-PEG, PLA-PEG-PLA, PHB, P (PEG / PBO) terephthalate, PEG-bis- (PLA-acrylate), PEG-gP (AAm- co-Vamine), PAAm, P (NIPAAm-co-AAc), P (NIPAAm-co-EMA), PVAc / PVA, PNVP, P (MMA-co-HEMA), P (AN-co-ally sulfate), P (bisscrboxy-phenoxy-phosphazene), P (GEMA-sulfate), P (PEG-co-peptides), alginate-g- (PEO-PPO-PEO), P (PLGA-co-serine), collagen-acrylate, It may be any one selected from the group consisting of P (HPMA-g-peptide), P (HEMA / Materigel) and HA-g-NIPAAm.

Subsequently, an initiator for initiating the polymerization of the monomers described above can be added to the reaction solvent. Initiators include ammonium persulfate (APS), acetyl peroxide, benzoyl peroxide, diacyl peroxide, cumene hydroperoxide, alkyl peroxide, potassium peroxide, ammonium peroxide, ammonium peroxide, azobisisobuty One or a mixture of two or more selected from anitrile (azobisisobutyronitrile (AIBN), azobiscyclohexanecarbonyl, tetramethylthiuram disulfide, dibenzoyldisulfide, P-toluolsulfinic acid and alkanesulfinic acid can be used. It is not limited to this.

After adding a crosslinking agent, a monomer for preparing a hydrogel, and an initiator to the reaction solvent described above, the step of gelling by stirring is performed. The support structure 101 and the micropores 102 are formed by the polymerization and crosslinking of the monomers. The micropores 102 may be pores having a size of 10 ~ 300㎛.

The porous hydrogel 100 may generally maximize specific surface area by imparting voids to the inside of the hydrogel. Hydrogel 100 may form a variety of pore structure according to the manufacturing method, the swelling speed and the absorbency may vary depending on the presence, size, shape of the pore.

Porous hydrogel 100 according to the present invention is a porous hydrogel having a pore of 10 ~ 300㎛ shows an absorption effect by the capillary phenomenon by forming open channels connected to all pores. Methods for synthesizing the porous hydrogel include porosigen technique, phase separation technique, salt leaching method, freeze-dry method, gas blowing method.

Subsequently, b) absorbing a solution containing K ₃ [Fe (CN) ₆ ] in the micropores 102 of the porous hydrogel 100 (S20). The micropores _{(102) K 3 [Fe (} CN) 6] so that this can be uniformly impregnated is immersed the _{K 3 [Fe (CN) 6} ] The porous hydrogel 100 to the dissolved solution. K ₃ [Fe (CN) ₆ ] can be dissolved in a solvent such as distilled water, methanol, ethanol, or the like to form a solution containing K ₃ [Fe (CN) ₆ ]. As a result, K ₃ [Fe (CN) ₆ ] may be evenly distributed in the micropores 102 of the porous hydrogel 100. Referring to FIG. 3, it can be observed that K ₃ [Fe (CN) ₆ ] is absorbed into the micropores 102.

Subsequently, the porous hydrogel 100 in which K ₃ [Fe (CN) ₆ ] is absorbed is immersed in a FeCl ₃ solution, and heat is formed to form Prussian Blue (S30).

FeCl ₃ can be dissolved in a solvent such as distilled water, methanol, ethanol, or the like, and can be formed into a solution containing FeCl ₃ . Thereafter, the porous hydrogel 100 of step b) is immersed in a solution containing FeCl ₃ . As a result, K ₃ [Fe (CN) ₆ ] and FeCl ₃ absorbed in the micropores 102 of the porous hydrogel 100 may react with each other. That is, FeCl _{3 is} also included in the solution, and is absorbed into the micropores 102 of the porous hydrogel 100, and as FeCl ₃ is absorbed, K ₃ [Fe (CN) ₆ ] and FeCl ₃ may react with each other. Can be. Referring to FIG. 4, it can be seen that K ₃ [Fe (CN) ₆ ] and FeCl ₃ are absorbed into the micropores 102.

Subsequently, heat is applied to the porous hydrogel 100. By heat, the flow advances to _{K 3 [Fe (CN) 6} ] and of FeCl ₃ at a temperature atmosphere of 40 ℃ ~ 200 ℃. K ₃ [Fe (CN) ₆ ] and FeCl ₃ may form Prussian Blue particles by a redox reaction. As Prussian Blue particles are formed, Prussian Blue is fixed to the micropores 102 in which the reaction proceeds. As a result, Prussian Blue may be fixed to the inside of the porous hydrogel 100.

By the above-described steps, cesium adsorbent 10 as shown in FIG. 1 may be formed.

Cesium adsorbent 10 formed by the present invention is fixed by the Prussian blue 110 to the porous hydrogel 100, the Prussian blue 110 can be evenly dispersed in the aqueous solution by the porous hydrogel (100). have. That is, although Prussian blue had a property of decreasing dispersibility in water, it is dispersed by a hydrogel having excellent dispersibility in water, thereby improving and maintaining the dispersibility of Prussian blue in water. In addition, Prussian blue is dispersed in the form of particles in an aqueous solution, so it is difficult to collect after use. However, when the Prussian Blue is dispersed by fixing to the hydrogel, the Prussian Blue may be collected through the collection of the hydrogel, which is relatively easy to collect, thereby improving convenience of use.

The cesium adsorbent 110 of the present invention can improve the dispersibility and ease of use of Prussian blue for removing cesium, which is a radioactive substance remaining in the contaminated water, and is expected to be used in a radioactive contaminated zone.

Hereinafter, the present invention will be described in more detail with reference to Examples. It is to be understood by those skilled in the art that these embodiments are only for describing the present invention in more detail and that the scope of the present invention is not limited by these embodiments in accordance with the gist of the present invention .

Preparation Example 1 Preparation of Porous Hydrogel

In a vial bottle, 10 mL of distilled water as a solvent, 0.1 g of BIS as a crosslinking agent, 1 g of monomer acrylamide (Acrylamide, Am) for producing a hydrogel, and 0.01 g of APS as an initiator were completely dissolved, and then 1 mL of the mixed solution was added to a mold. Slowly add 4 ml of oil. The mixture was stirred at 1500 rpm to form a high internal phase emulsion and then reacted for 4 hours in an oven preheated to 40 ° C.

After completion of the reaction, the mixture was cooled to room temperature and desorbed from the hydrogel, and the process of washing with tetrahydrofuran (Tetrahydrofuran (THF) and acetone) was repeated three to five times to remove the solvent and oil remaining in the hydrogel. . As a result, a porous hydrogel including micropores was prepared.

Preparation Example 2 Preparation of Cesium Adsorbent

3.29 g of potassium hexacyanoferrate (II) acid (K ₃ [Fe (CN) ₆ ]) was added and dissolved in 100 mL of distilled water to prepare a solution containing K ₃ [Fe (CN) ₆ ]. The porous hydrogel prepared in Preparation Example 1 was immersed in the solution. Immersion was performed for 30 minutes so that K ₃ [Fe (CN) ₆ ] was sufficiently absorbed into the micropores of the porous hydrogel.

Subsequently, 1.62 g of iron chloride (FeCl ₃ ) was added to 100 mL of distilled water, followed by stirring to completely dissolve iron chloride to prepare an iron chloride solution. Spontaneous redox reduction of K ₃ [Fe (CN) ₆ ] and FeCl ₃ for 6 hours at 40 ° C. in a state of immersing the porous hydrogel absorbed with K ₃ [Fe (CN) ₆ ] in the prepared iron chloride solution. It was induced to react. As a result, Prussian blue was formed in the micropores of the porous hydrogel. As Prussian blue was formed in the micropores, Prussian blue was fixed to the micropores of the porous hydrogel, thereby finally completing the cesium adsorbent having Prussian blue fixed to the porous hydrogel.

5 is a SEM, TEM electron micrograph of the cesium adsorbent prepared by the above production method. As can be seen in Figure 5, it can be seen that the Prussian blue is formed and fixed on the surface of the micropores of the porous hydrogel. In addition, FIG. 6 is an X-ray diffraction spectroscopy (XRD) -pattern of the prepared cesium adsorbent, and it was found that the XRD-pattern of the Prussian blue and the XRD-pattern of the prepared cesium adsorbent were the same. That is, it was found that the cesium adsorbent prepared effectively contained Prussian blue.

Experimental Example: Measurement of cesium absorption capacity of the prepared cesium adsorbent

The radioactive cesium adsorption characteristics of the Prussian blue-fixed porous hydrogel prepared by the preparation example were confirmed. Adsorption characteristics of radioactive cesium in porous hydrogels were confirmed by evaluation of adsorption capacity by adjusting the concentration of radioactive simulative waste solution (CsCl).

0.02 g of the cesium adsorbent thus prepared was added to the reactor, and 50 ml of the radioactive simulative waste solution (CsCl aqueous solution) prepared at a concentration of 6 to 27 ppm was added to the reactor. After the experiment was completed, a sample was collected by syringe filtering, and the sample was analyzed for cesium concentration using an inductively coupled plasma mass spectrometer (ICP-MS, ELAN DRC2, PerkinElmer, USA). The results are shown in Table 1.

Initial cesium concentration (ppm) Cesium Adsorbent Amount (g) Max adsorption amount (mmol / g) 7 0.2 0.02704 14 0.2 0.05222 21 0.2 0.06882 27 0.2 0.07667

As can be seen from Table 1, the cesium adsorbent of the present invention was confirmed to exhibit a high cesium adsorption amount. As the initial concentration of cesium increases gradually, the cesium maximum adsorption amount of the cesium adsorbent increases. This means that the cesium adsorbent can adsorb more cesium in proportion to the increase in concentration of cesium and exhibit excellent cesium adsorption properties. Therefore, the cesium adsorbent of the present invention can selectively adsorb and react with the radioactive cesium, it can be seen that exhibits excellent adsorption characteristics of radioactive cesium.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, It will be understood that the invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive.

Claims (10)

In the cesium adsorbent for removing cesium, which is a radioactive substance remaining in the contaminated water,
Porous hydrogel containing micropores and dispersed in water; And
Cesium adsorbent comprising Prussian Blue adsorbed to the micropores. The method according to claim 1,
The porous hydrogel is a cesium adsorbent of any one of collagen, gelatin, fibrin, alginic acid, hyaluronic acid, chitosan, polyacrylamide, polyacrylic acid, polyethylene oxide, polyvinyl alcohol, and polyphosphazene. In the method for producing a cesium adsorbent for removing cesium which is a radioactive substance remaining in the contaminated water,
a) providing a porous hydrogel comprising micropores and dispersed in water;
b) absorbing a solution containing K ₃ [Fe (CN) ₆ ] in the micropores of the porous hydrogel; And
c) a method of preparing a cesium adsorbent comprising immersing the porous hydrogel passed through step b) in a FeCl ₃ solution and applying heat to form Prussian Blue. The method of claim 3,
The Prussian Blue is a method for producing a cesium adsorbent adsorbed to the micropores. The method of claim 3,
Providing the porous hydrogel,
A method of producing a cesium adsorbent comprising forming a porous hydrogel by adding a crosslinking agent, a monomer for preparing a hydrogel, and an initiator to a reaction solvent. 6. The method of claim 5,
The reaction solvent is aqueous, saturated hydrocarbon (hexane, pentane, petroleum ether), aromatic hydrocarbon (benzene, toluene, xylene), alcohol (methanol, ethanol, benzyl alcohol), ketone (acetone, methyl ethyl ketone , Methyl butyl ketone, cyclohexanone), ester type (methyl acetate, ethyl acetate, etc.), ether type (diethyl ether, isopropyl ether, THR, dioxane), amide type (dimethylformamide, diethylformamide) , Sulfoxide-based (dimethyl sulfoxide, sulfolane), organic acid (formic acid, acetic acid, propionic acid), a method of producing a cesium adsorbent any one selected from the group consisting of acetnitrayl and tetralin. 6. The method of claim 5,
The crosslinking agent is glutaraldehyde, N, N'-methylene-bis-acrylamide (N, N'-methylene-bis-acrylamide, BIS), N, N, N ', N'-tetramethyl ethylene Method for producing a cesium adsorbent which is at least one selected from diamines (N, N, N ', N'-tetramethyl ethylene diamine), ethylene glycol dimethacrylate (ethylene glycol dimethacrylate). 6. The method of claim 5,
The monomer may be acrylamide (Am), acrylic acid (AA), HA, alginic acid, pectin, carrageenan, chondroitin sulfate, dextransulfate ( dextran sulfate, chitosan, polylysine, collagen, carboxyethyl chitin, fibrin, dextran, agarose, pullulan , PEG-PLA-PEG, PEG-PLGA-PEG, PEG-PCL-PEG, PLA-PEG-PLA, PHB, P (PEG / PBO) terephthalate, PEG-bis- (PLA-acrylate), PEG-gP (AAm -co-Vamine), PAAm, P (NIPAAm-co-AAc), P (NIPAAm-co-EMA), PVAc / PVA, PNVP, P (MMA-co-HEMA), P (AN-co-ally sulfate) , P (bisscrboxy-phenoxy-phosphazene), P (GEMA-sulfate), P (PEG-co-peptides), alginate-g- (PEO-PPO-PEO), P (PLGA-co-serine), collagen-acrylate , P (HPMA-g-peptide), P (HEMA / Materigel) and HA-g-NIPAAm is a method for producing a cesium adsorbent any one selected from the group consisting of. 6. The method of claim 5,
The initiator may be ammonium persulfate (APS), acetyl peroxide, benzoyl peroxide, diacyl peroxide, cumene hydroperoxide, alkyl peroxide, potassium peroxide, ammonium peroxide, ammonium peroxide, azobisisoiso A method for producing cesium adsorbent which is at least one selected from butyronitrile (azobisisobutyronitrile, AIBN), azobiscyclohexanecarbonyl, tetramethylthiuram disulfide, dibenzoyldisulfide, P-toluolsulfinic acid and alkanesulfinic acid. The method of claim 3,
The c) step is a method of producing a cesium adsorbent is carried out in a temperature atmosphere of 40 ℃ ~ 200 ℃.

Images