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Preparation method for cesium-137 extracting composite material

A composite material and uniform mixing technology, applied in chemical instruments and methods, ion exchange, other chemical processes, etc., to achieve the effects of high mechanical strength, convenient desorption, and simple operation

Inactive Publication Date: 2013-06-05
CHINA INSTITUTE OF ATOMIC ENERGY
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  • Description
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Problems solved by technology

Currently, my country's 137 The Cs radioactive standard solution is basically imported from abroad, which is mainly due to the fact that our country does not have a good 137 Cs extraction technology

Method used

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  • Preparation method for cesium-137 extracting composite material
  • Preparation method for cesium-137 extracting composite material
  • Preparation method for cesium-137 extracting composite material

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Embodiment Construction

[0026] Accurately weigh 32.2g of zirconium oxychloride in a 1000mL beaker with an electronic balance, then add 100ml of deionized water to completely dissolve the zirconium oxychloride. Then take 10ml of 85% phosphoric acid from the sampler, slowly add it into the beaker, and stir for about 2 hours to fully react. Then, stand at room temperature for about 4 hours, and pour off the supernatant. Next, use a vacuum filter to filter under a vacuum of 0.1 MPa to obtain a precipitate. Finally, the precipitate is placed in a constant temperature drying oven at 120-130° C. and dried to a constant weight to obtain zirconium phosphate ZrP particles.

[0027] Use an electronic balance to accurately weigh 25g of ammonium phosphomolybdate (AMP) into a 1000ml clean beaker, then use a graduated cylinder to measure 200ml of 3mol / L nitric acid solution and pour it into the beaker, then stir with a glass rod to fully dissolve it. Then, 25 g of ZrP particles synthesized by the above method wer...

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Abstract

The present invention provides a preparation method for a cesium-137 extracting composite material, wherein the preparation method has a characteristic of simple operation. The method comprises the following steps: (1) stirring dissolved zirconium oxychloride and a phosphoric acid solution; (2) carrying out standing, precipitation, filtration and drying to obtain zirconium phosphate; (3) adopting a nitric acid solution to dissolve ammonium phosphomolybdate; (4) adding the zirconium phosphate to the ammonium phosphomolybdate solution, and stirring; (5) carrying out standing, precipitation, filtration, washing and drying to obtain an inorganic particle material; and (6) adopting an adhesive to carry out granulation, and carrying out drying constant weight, grinding and screening to obtain the composite material. The method has characteristics of simple operation and easy condition control. The material provides high selectivity for Cs, and is easy to desorb. The material particles have a high mechanical strength, and can meet cesium extraction requirements of column operation.

Description

technical field [0001] The invention relates to the field of radionuclide separation, in particular to a method for preparing a composite material for extracting cesium-137. Background technique [0002] 137 Cs is one of the most important fission products with a long half-life (T 1 / 2 =30.17a), with high branching ratio and moderate ray energy (662keV), it can be used as various radiation sources. Therefore, its distribution is very wide, and it exists in places such as spent fuel reprocessing waste liquid, nuclear power operation waste liquid, nuclear facility decontamination and decommissioning waste liquid, and laboratory waste liquid. Cs is in group IA of the 6th period of the periodic table, and it is easy to lose electrons to form stable monovalent cations, which are monovalent in almost all compounds. therefore, 137 Cs are easy to get into the environment. 137 As a moderate radiotoxic nuclide, Cs will be very harmful to humans once it enters the environment. The...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/02B01J20/30B01D15/08C22B26/10
Inventor 游新锋张振涛马辉
Owner CHINA INSTITUTE OF ATOMIC ENERGY
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