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Method for absorbing uranium from seawater

A seawater and adsorbent technology, applied in seawater treatment, chemical instruments and methods, adsorbed water/sewage treatment, etc., can solve the problems of low concentration of uranium resources, high extraction difficulty, complex structure, etc., and achieve good selectivity and adsorption efficiency. High, easy-to-use effects

Inactive Publication Date: 2017-06-13
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The total amount of uranium in seawater in the world is as high as 4.5 billion tons, which is more than 1,000 times that of the proven uranium reserves on land. It is recognized as the future of nuclear power, but compared with other marine chemical resources, the concentration of uranium resources is lower. The structure is more complex and the extraction is more difficult

Method used

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  • Method for absorbing uranium from seawater
  • Method for absorbing uranium from seawater
  • Method for absorbing uranium from seawater

Examples

Experimental program
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Effect test

Embodiment 1

[0025] Dissolve 0.5g of the compound naphthyl amide oxime (NpAO) shown in structural formula I in 45.0mL of dichloromethane, mix homogeneously to obtain a solution; add 4.5g of SiO to this solution 2 -P Stir evenly, and use a rotary evaporator to evaporate dichloromethane under reduced pressure to volatilize the methylene chloride until the material is in a near-dry state, and then vacuum-dry the near-dry material at 55°C for 24 hours to obtain an adsorbent.

Embodiment 2

[0027] Dissolve 0.5g of the compound naphthyl amidoxime (NpAO) shown in structural formula I in 40.0mL of dichloromethane, mix well to obtain a solution; add 4.0g of SiO to this solution 2 -P Stir evenly, and use a rotary evaporator to evaporate dichloromethane under reduced pressure to volatilize the material to a near-dry state, and then vacuum-dry the near-dry material at 50°C for 24 hours to obtain an adsorbent.

Embodiment 3

[0029] Dissolve 0.5g of the compound naphthyl amidoxime (NpAO) shown in structural formula I in 50.0mL of dichloromethane, mix uniformly to obtain a solution; add 5.5g of SiO to this solution 2 -P Stir evenly, and use a rotary evaporator to evaporate dichloromethane under reduced pressure to volatilize the methylene chloride until the material is in a near-dry state, and then vacuum-dry the near-dry material at 60°C for 24 hours to obtain an adsorbent.

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Abstract

The invention discloses a method for absorbing uranium from seawater, wherein the method includes steps of mixing absorbent with seawater, and absorbing uranium in the sea water by the absorbent, wherein the absorbent is prepared by loading organic chelating agent naphthyl amidoxime on a big hole SiO2 of the covered polymer. The pH value of the seawater is 7-7.5. Every g absorbent is mixed with 20-30 mL seawater. The preparation method of the absorbent includes steps of dissolving a compound shown in a structural formula I in dichloromethane; adding carrier in the solution and mixing evenly; after rotary evaporating and drying, acquiring the absorbent. Every g compound shown as the structural formula I is dissolved in 80-100 mL dichloromethane. The method for absorbing uranium from seawater can absorb uranium from sweater; the method is simple in operation, good in selectivity and high in absorbing efficiency.

Description

technical field [0001] The invention relates to the technical field of element separation, in particular to a method for adsorbing uranium from seawater. Background technique [0002] The operating time of a nuclear power plant is usually at least 60 years, and a large amount of capital needs to be invested during the construction period. Therefore, before the construction of a nuclear power plant, it is necessary to ensure that uranium at a reasonable price can be obtained in the next few decades. There is uncertainty about whether land-based uranium resources are sufficient. Uncertainty has always affected decision-making in the nuclear energy industry. [0003] China's terrestrial uranium resources are not rich, and the storage of uranium resources is related to the sustainable development of China's nuclear power. The total amount of uranium in seawater in the world is as high as 4.5 billion tons, which is more than 1,000 times that of the proven uranium reserves on lan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/22B01J20/30C02F1/28C22B60/02C02F103/08
CPCB01J20/22C02F1/288C02F2103/08C22B60/0204
Inventor 张安运
Owner ZHEJIANG UNIV