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High-speed selective cesium adsorption resin material, method for preparing same and application thereof

A technology for adsorbing resins and polymer materials, applied in chemical instruments and methods, radioactive purification, other chemical processes, etc., to achieve the effects of strong controllability, good economic benefits, and high reaction efficiency

Inactive Publication Date: 2014-01-01
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] At present, there is no relevant literature report that ammonium phosphomolybdate can be fixed on the surface of the adsorption material to prepare a cesium adsorption resin material with high-speed adsorption characteristics.

Method used

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  • High-speed selective cesium adsorption resin material, method for preparing same and application thereof
  • High-speed selective cesium adsorption resin material, method for preparing same and application thereof
  • High-speed selective cesium adsorption resin material, method for preparing same and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0037] 1) Using crystalline cellulose microspheres (about 200 microns in average diameter, 76% crystallinity) as a polymer substrate, put 10 grams of the above materials into a PE bag containing nitrogen, and use an electron accelerator to perform electron beam radiation to make it Generate active free radicals that can be used for grafting reactions. Irradiation conditions: the irradiation voltage is 2MeV, the irradiation dose is 30kGy, and the dose rate is 10kGy / pass.

[0038] 2) The above-mentioned particles after irradiation are immediately put into an emulsion reaction system composed of 30wt% GMA+3wt% polyoxyethylene sorbitan monolaurate (Tween20)+67wt% water for graft polymerization. The emulsification reaction system of GMA monomer is continuously blown with nitrogen for 30 minutes before use to exhaust oxygen in the water. The graft polymerization reaction is carried out at 50°C, and the reaction is terminated after about 2 hours (the grafting rate of the substrate reac...

Embodiment 2

[0042] 1) Using polypropylene microsphere material (average diameter of 250 microns, crystallinity of 60%) as the polymer substrate, 10g of the above material and 1.5g of azobisisobutyronitrile, put in 30wt% 4-HBAGE+70wt% The graft polymerization reaction is carried out in an organic solvent (about 50g) composed of acetone. After the graft polymerization reaction is carried out at 60°C for 8 hours (the grafting rate of the substrate reaches about 80%), the reaction is terminated.

[0043] 2) The above-mentioned 4-HBAGE monomer grafted product, after washing and drying, put it into a 5wt% ammonium phosphotungstate suspension aqueous solution for epoxy ring-opening reaction, and shake the reaction at 80°C for 24 hours (ammonium phosphotungstate The introduction rate is about 15wt%), the cesium adsorption resin material is prepared after taking it out, washing and drying.

[0044] The adsorption resin material obtained by the above method has a diameter of about 300 microns, a densit...

Embodiment 3

[0046] 1. Static adsorption test of Cs adsorption resin material

[0047] Weigh 0.1 g of the adsorbent material prepared in Example 1, and put it in 100 ml of an aqueous solution prepared with stable isotope 133Cs at room temperature to perform a static batch adsorption test. The Cs solution used in the adsorption test was prepared from 133Cs nitrate, with an initial concentration of 5 mg / L and pH 5.8. The above adsorption test was stirred at room temperature, the adsorption time was different from 5 min to 60 min, the supernatant was recovered, and the residual Cs concentration was analyzed by atomic absorption spectroscopy to calculate the adsorption amount.

[0048] From figure 2 We can see that the adsorption speed of the Cs adsorption resin obtained in the present invention is very fast, and the adsorption equilibrium is basically reached within 20 minutes, and it has the characteristics of high-speed adsorption of Cs.

[0049] 2. Column pressure test of Cs adsorption resin ma...

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Abstract

The invention relates to a cesium adsorption material. The cesium adsorption material is an organic-inorganic composite resin material formed by reaction of a high-molecular material containing an epoxy group and a phosphorus heteropoly acid salt-containing inorganic material. A surface layer of the composite resin material is mainly inorganic constituents. According to the cesium adsorption material, an ion adsorbent is led into the surface of a high-molecular base material, and accordingly the grain size of the cesium adsorption material can reach 400 microns and requirements for industrial absorption column filling are satisfied; the cesium adsorption material has the advantages of being high in absorption speed, Cs attached to resin can be completely desorbed easily through eluent, the treated absorption resin can absorb the Cs again and can be reused, and the cesium adsorption material has good economical benefits.

Description

Technical field [0001] The invention belongs to the technical field of cesium adsorption resin materials, and particularly relates to a high-speed selective cesium adsorption resin material and a preparation method and application thereof. Background technique [0002] Uranium-based nuclear fuel is produced during fission 134 Cs and 137 Cs and other radionuclides, these radioactive Cs emit strong gamma rays during the decay process, and the cesium in the high-level liquid waste needs to be separated and recovered in the nuclear fuel cycle treatment. Generally speaking, these radioactive Cs will not appear in the environment, and the recovery technology for the low-level radioactive cesium in the environment has not been paid attention to. However, since the Fukushima nuclear power accident in Japan in March 2011, a large amount of radioactive Cs has leaked into the environment, posing a serious threat to living organisms. The development of radioactive Cs separation and recovery...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26B01J20/30G21F9/12
Inventor 赵龙
Owner SHANGHAI JIAO TONG UNIV
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