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Material capable of enriching and separating uranium in aqueous solution and its preparation method

An aqueous solution and enrichment technology, applied in chemical instruments and methods, improvement of process efficiency, other chemical processes, etc., can solve the problems of easy powder agglomeration, difficult recovery, and difficult to process and shape, and achieve mild desorption conditions and simple methods. Ease of operation and energy saving effect

Active Publication Date: 2017-06-30
LANZHOU UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although HAP has excellent adsorption performance, the preparation cost of HAP is high, the brittleness is high, and it is not easy to process and shape. At the same time, HAP powder is easy to agglomerate and recovery is difficult, which limits its practical application range as an adsorption material.

Method used

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  • Material capable of enriching and separating uranium in aqueous solution and its preparation method
  • Material capable of enriching and separating uranium in aqueous solution and its preparation method
  • Material capable of enriching and separating uranium in aqueous solution and its preparation method

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Embodiment Construction

[0023] The present invention is illustrated below in conjunction with examples.

[0024] One, the preparation of material of the present invention

[0025] Under vigorous stirring, 0.3M 25mL H 3 PO 4 Add 50mL of 0.25M Ca(OH) dropwise at a rate of 1mL / min 2 , the reaction was maintained at 55 ° C, after the addition of phosphoric acid was completed, the N 2 After a period of time, add 1±0.0010g (1:1) or 0.5±0.0010g (2:1) of acrylic acid, and then add 0.2g of cross-linking agent (N,N-methylene acrylamide (TEMED)), the increase The temperature is controlled at about 80°C. After the temperature is reached, add 0.5 mg of initiator (potassium persulfate) heated and dissolved in a small beaker, and continue under N 2 The reaction was heated under protection for a total reaction time of 8 hours. After the reaction stopped, the product was centrifuged, washed several times with deionized water, centrifuged and dried.

[0026] Characterization of the prepared material: IR infrare...

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Abstract

The invention relates to a material capable of enriching and separating uranium in a water solution and a preparation method of the material. The material capable of enriching and separating the uranium in the water solution is polyacrylic acid modified hydroxyapatite. The material is a uranium separation agent which is easily available in raw materials and relatively good in performance; the preparation method is simple and feasible, and the desorption and absorption conditions of the material are moderate, and no a large amount of strong acid and no a large quantity of toxin harmful substances are not emitted; no secondary pollution is generated and the material is a green novel material; and the material has strong specificity, and elements of a first main group and a second main group have no obvious influences on a separation system.

Description

technical field [0001] The invention relates to a material capable of enriching and separating uranium in aqueous solution and a preparation method of the material. Background technique [0002] With the peaceful use of nuclear energy and the continuous development of nuclear power, the efficiency and safety of radioactive waste disposal methods are key issues affecting the sustainable development of nuclear energy today. As a special class of metals, radioactive metal elements are different from common heavy metal elements in terms of properties and modes of action. Therefore, in terms of treatment methods, it is necessary to actively develop new treatment methods and methods while referring to the original treatment methods. craft. Common methods for treating radioactive waste include: ion exchange resin method, chemical precipitation method, membrane separation method, extraction method and biological adsorption method. Among these methods, adsorption is one of the most...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/26B01J20/30G21F9/12C22B60/02C22B7/00
CPCB01J20/26C22B60/0252G21F9/12Y02P10/20
Inventor 刘同环徐真段国建胡佩卓吴王锁
Owner LANZHOU UNIVERSITY
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