Material for adsorbing uranium from basic nuclear waste liquid and preparation method

A nuclear waste liquid and alkaline technology, applied in chemical instruments and methods, nuclear engineering, radioactive purification, etc., can solve the problems of poor water/chemical stability, low adsorption capacity, slow kinetics, etc., and achieve high adsorption selectivity, The effect of high adsorption capacity and fast adsorption kinetics

Active Publication Date: 2019-06-21
LANZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these adsorbents suffer from disadvantages such as low adsorption capacity, slow kinetics, weak affinity, and poor water / chemical stability.

Method used

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  • Material for adsorbing uranium from basic nuclear waste liquid and preparation method
  • Material for adsorbing uranium from basic nuclear waste liquid and preparation method
  • Material for adsorbing uranium from basic nuclear waste liquid and preparation method

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Experimental program
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Embodiment Construction

[0021] The present invention is explained below in conjunction with the embodiment of the specific material PAF-1.

[0022] One, PAF-1 preparation of the present invention

[0023] a) First synthesize the matrix material PPN-6 polymer.

[0024] b) Prepare PPN-6-CH 2 Cl.

[0025] c) Synthetic preparation of PAF-1.

[0026] Concrete preparation process is as follows:

[0027] Synthetic matrix material PPN-6

[0028] 2,2' bipyridine (0.452g 2.90mmol), 1,5 cyclooctadiene (0.36mL 2.92mmol), 1,5 cyclooctadiene nickel (0) (0.8g 2.90mmol), 4-bromobenzene Methyl methane (0.407g 0.64mmol), tetrahydrofuran (60mL). After stirring overnight at room temperature, the product was washed with water and methanol three times and dried.

[0029] Synthesis of PPN-6-CH 2 Cl

[0030] Concentrated HCl (20mL), concentrated H 3 PO 4 (3.0mL), glacial acetic acid (6.0mL), paraformaldehyde (1.0g) and PPN-6 (0.2g) in N 2 Under protection, heat and reflux at 90°C for 3 days, wash the product wit...

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Abstract

The invention discloses a material for adsorbing uranium from a basic nuclear waste liquid and a preparation method of the material. The material for adsorbing uranium from the basic nuclear waste liquid is prepared from a polymer PPN-6 as a matrix by connecting short-chain quaternary phosphonium salt with the chlorinated carbon atom number being 1-4 onto a benzene ring of PPN-6. The material hasquite high adsorption capacity on uranyl tricarbonate, and has quite high adsorption selectivity and faster adsorption kinetics, a back extraction agent of the material is diluted hydrochloric acid, and besides, a back extraction method is very simple and convenient and has good recyclability; the material can be incinerated after being repeatedly used, and no secondary waste is produced.

Description

technical field [0001] The present invention relates to a material that can be used to absorb uranium from alkaline nuclear waste liquid and its preparation method. Specifically, the present invention relates to an organic material that can separate uranium from alkaline low-level radioactive waste water discharged from the nuclear industry. Methods of preparation of organic materials. Background technique [0002] With the vigorous promotion and application of nuclear energy, more and more uranium-containing radioactive wastewater is produced. In order to prevent the migration and diffusion of radionuclides in water bodies and pollute the environment, the effective treatment of uranium-containing radioactive wastewater has become an urgent problem to be solved. Nuclear industry wastewater is a kind of high-salinity wastewater, when pH>8, uranium is mainly [UO 2 (CO 3 ) 3 ] 4- form, and the coexisting anions are mainly NO 3 - , SO 4 2- , CO 3 2- , F - , Cl - ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26B01J20/28B01J20/30G21F9/12
Inventor 沈颖林楚妮妮
Owner LANZHOU UNIVERSITY
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