A kind of material and method for recovering trace uranium in seawater

A technology of seawater and microspheres, which is applied in the field of uranium recovery, can solve problems such as retention, and achieve the effects of improving adsorption efficiency, good U/V separation effect, and improving adsorption selectivity

Active Publication Date: 2022-04-26
PEKING UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, so far, the seed swelling method has only stayed in the preparation of molecularly imprinted polymers, and has not been applied to the preparation of ionically imprinted polymers.

Method used

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  • A kind of material and method for recovering trace uranium in seawater
  • A kind of material and method for recovering trace uranium in seawater
  • A kind of material and method for recovering trace uranium in seawater

Examples

Experimental program
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Embodiment 1

[0035] 1. Synthesis of U-IIP (NIP)

[0036] The monodisperse porous polymer microspheres were prepared by the seed swelling method, and the schematic diagram of the process is shown in figure 1 shown.

[0037] 1.0 mL of polystyrene seed microspheres was added to a dispersion formed by sonication of 0.48 mL of DBP, 0.025 g of SDS and 100 mL of water. In the first step of swelling, stir at 35°C for 12 hours until the oil droplets completely disappear. Next, add the microemulsion formed by 10mg initiator AIBN, 5mL porogen toluene, 10mL dispersant PVA (4.8%) and 12.5mL water to the above mixture, start the second step of swelling, and stir at 35°C for 2h. Then, 0.125 g (0.25 mmol) of UO 2 (NO 3 ) 2 ·6H 2 O, 0.170 g (0.5 mmol) BVBPAC, 69.6 μL (0.5 mmol) Et 3 N, 0.755mL (4mmol) EGDMA, then the above mixture was added to the swelling liquid in the second step, stirred for the third step of swelling, and stirred at 35°C for 2h. After the swelling process is completed, at N 2 ...

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Abstract

The invention discloses a material and a method for recovering trace uranium in seawater. The present invention selects 2-(bis(4-vinylbenzyl)phosphoryl)acetic acid as the functional monomer, and uses polystyrene seed microspheres to prepare porous uranyl ion imprinted polymer U-IIP through the seed swelling method. The chemical adsorption material is used for the extraction of trace uranium in seawater. The material can efficiently recover trace uranium in spiked seawater. In addition, when combined with ICP‑AES / MS, the material can also be used to quickly and accurately detect the concentration of metal ions.

Description

technical field [0001] The invention provides a method for recovering uranium in seawater solution, in particular to a method and material for highly selective enrichment of trace uranium from seawater with added standards. Background technique [0002] Uranium (U) is the basic resource for the development of the nuclear industry and a strategic resource for the development of nuclear energy. In order to ensure the sustainable development of nuclear energy, the development of unconventional uranium resources is particularly important. The reserves of uranium in seawater are about 4.5 billion tons, which is more than 1000 times that of uranium reserves on land. Therefore, the extraction of uranium from seawater has attracted more and more attention. However, the concentration of uranium in seawater is extremely low (about 3.3 μg L –1 ), and there are many interfering ions, the selective extraction of trace uranium from seawater is still a great challenge. [0003] The firs...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F257/02C08F230/02C08F222/14C08J9/28B01J20/26B01J20/28B01J20/30C22B60/02C22B3/24
CPCC08F257/02C08J9/28B01J20/268B01J20/28021C22B60/0265C08F230/02C08F222/102
Inventor 沈兴海郏丽配
Owner PEKING UNIV
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