Preparation method of solid-phase extraction agent that can be used for plutonium separation

A solid-phase extraction agent and extraction technology, which is applied in the direction of improving process efficiency, can solve the problem of low plutonium separation efficiency, and achieve the effects of fast extraction rate, good selectivity, and large extraction capacity

Inactive Publication Date: 2021-06-04
63653 FORCES PLA
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Problems solved by technology

[0004] Purpose of the invention: the purpose of this invention is to provide a kind of pyridine solid-phase extraction agent, to solve the problems such as low plutonium separation efficiency in existing materials

Method used

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  • Preparation method of solid-phase extraction agent that can be used for plutonium separation

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Embodiment

[0017] Example: Separation / recovery of plutonium in plutonium-containing waste liquid

[0018] 1) Preparation of extractant:

[0019] Weigh 3 g of polyvinylpyridine particles (2% cross-linked 60 mesh 8meq / g) into a 500 mL flask, add 100 mL of iodomethane (analytical grade), and then stir and react at 40 °C for 2 h. After the reaction product was nearly dried by rotary evaporation, it was washed with deionized water for more than 3 times, and dried for later use.

[0020] 2) Extraction and stripping of plutonium

[0021] Adjust the plutonium-containing waste liquid to a nitric acid concentration of 8-10 mol / L, add the synthesized solid-phase extraction agent at 10 mg extractant / 3 ml waste liquid, and stir or shake for 30 minutes. Centrifuge solid-liquid separation. Add 0.2 mol / L disodium EDTA at a ratio of about 10ml of stripping agent per gram of extractant, strip for 20 minutes, centrifuge for solid-liquid separation, and collect the stripped solution enriched in plutonium...

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Abstract

The present invention relates to solid phase extraction technology, be the preparation method of the solid phase extraction agent that can be used for plutonium separation, get 3g poly-4-vinylpyridine particle in the round bottom flask, add methyl iodide reagent (analytical grade, Bai Lingwei reagent), in 40 The reaction was stirred at ℃ for 2 h, then rotary evaporated to dryness, and the composition was washed with deionized water for more than 3 times to obtain the desired product. The pyridine solid phase extraction agent provided by the invention has the advantages of large extraction capacity, good selectivity, fast extraction rate, etc., and is especially suitable for the separation of plutonium in plutonium-containing waste liquid.

Description

technical field [0001] The invention relates to a solid-phase extraction agent, which can be used for the separation and recovery of plutonium in waste water. Background technique [0002] Activities such as the nuclear industry produce a large amount of radioactive waste liquid, and the waste water discharged from nuclear power plants may contain highly toxic plutonium. These waste liquids need to undergo a strict purification process before being discharged into the natural environment, that is, elements such as plutonium need to be separated, and then disposed or recycled. On the other hand, the measurement of plutonium in environmental samples requires the establishment of a reasonable and applicable plutonium separation and purification process. The work in the above two aspects urgently needs high-efficiency plutonium separation materials, but the existing traditional plutonium separation materials such as anion exchange resins cannot fully meet the requirements in te...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B3/36C22B60/04C22B7/00
CPCC22B7/006C22B60/04C22B3/362Y02P10/20
Inventor 不公告发明人
Owner 63653 FORCES PLA
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