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A method for improving selective adsorption efficiency of uranyl ions

A technology of uranyl ion and adsorption efficiency, applied in the field of polymer material modification, can solve the problems of low efficiency and poor selectivity of uranyl ion, and achieve the effects of improving adsorption selectivity, reducing adsorption and improving adsorption efficiency

Active Publication Date: 2021-07-02
SHANGHAI INST OF APPLIED PHYSICS - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a method for improving the selective adsorption efficiency of uranyl ions, thereby solving the problems of low efficiency and poor selectivity in the adsorption of uranyl ions in the prior art

Method used

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  • A method for improving selective adsorption efficiency of uranyl ions
  • A method for improving selective adsorption efficiency of uranyl ions
  • A method for improving selective adsorption efficiency of uranyl ions

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] First, weigh 0.4g of ultra-high molecular weight polyethylene fiber (UHMWPE-AO) containing amidoxime group, soak it in 200mL UO containing 100mg / L 2 2+ After 12 hours in the solution, rinse the surface with distilled water for 3 times and dry in an oven at 60°C for 24 hours.

[0024] Then, transfer the material adsorbed with uranyl ions obtained through the above steps to a ziplock bag filled with distilled water, and irradiate under a 300kGy electron beam; then, place the irradiated material in 100mL of 0.5mM hydrochloric acid solution, Mix and shake for 2 hours, rinse the surface with distilled water three times and dry in a 60°C oven for 24 hours to obtain the uranyl ion-imprinted adsorption material UHMWPE-AO-II.

Embodiment 2

[0026] First weigh 0.4g polyethylene polypropylene fiber (PE / PP-NH2) containing ethylenediamine, soak it in 200mL100mg / L UO 2 2+ After 12 hours in the solution, rinse the surface with distilled water three times and dry in an oven at 60°C for 24 hours.

[0027] Then, the material adsorbed with uranyl ions was transferred to a ziplock bag filled with distilled water, and irradiated under a 200 kGy cobalt source; then, the irradiated material was placed in 100 mL of 0.1 mM hydrochloric acid solution, mixed and shaken for 1 h, Rinse the surface with distilled water three times and put it in a 60°C oven to dry for 24 hours to obtain the uranyl ion imprinted adsorption material PE / PP-NH 2 -II.

Embodiment 3

[0029] First, weigh 0.4g of high-density polyethylene fiber (HDPE-NH2) containing triethylenetetramine, soak it in 200mL of 100mg / L UO 2 2+ After 12 hours in the solution, rinse the surface with distilled water three times and dry in an oven at 60°C for 24 hours.

[0030] Then, the material adsorbed with uranyl ions was transferred to a ziplock bag filled with distilled water, and irradiated under a 250 kGy electron beam; then, the irradiated material was placed in 100 mL of 0.5 mM hydrochloric acid solution, mixed and shaken for 2 h, Rinse the surface with distilled water three times and put it in a 60°C oven to dry for 24 hours to obtain the uranyl ion-imprinted adsorption material HDPE-NH 2 -II.

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Abstract

The invention provides a method for improving the selective adsorption efficiency of uranyl ions, which includes the steps: S1: arranging polymer fibers or nonwovens containing adsorption functional groups in a solution containing uranyl ions to obtain adsorbed uranyl ions Ionic polymer fibers or non-woven fabrics; S2: transfer the polymer fibers or non-woven fabrics adsorbed with uranyl ions to water, and use radiation cross-linking to imprint uranyl ions to obtain uranyl ions Imprinted adsorbent material; S3: put the uranyl ion-imprinted adsorbent material into a solution containing uranyl ions and other coexisting ions, and the uranyl ions in the solution will be selectively adsorbed to the uranyl ion-imprinted adsorbent material. According to the method provided by the present invention, high selectivity and high efficiency adsorption of uranyl ions are realized, while the adsorption capacity of other coexisting ions decreases. In order to find alternative uranium resources to cope with the shortage of land uranium resources and maintain my country's military nuclear power make a significant contribution to sustainable development.

Description

technical field [0001] The invention relates to the field of polymer material modification, in particular to a method for improving the selective adsorption efficiency of uranyl ions. Background technique [0002] The development of nuclear plants has brought about a large amount of radioactive nuclear waste discharge pollution. Because uranium is radioactive and chemically toxic, uranium is considered to be one of the most important pollutants in waste liquid, and it is also a substance harmful to the environment and human health. At the same time, uranium is also an indispensable raw material in the nuclear industry. Therefore, for the sustainable development of the nuclear industry, extracting uranium from radioactive wastewater is a very necessary technology. However, in nuclear waste liquid, there are many other radioactive and non-radioactive metal ions co-existing with uranium ions, and it is a very important technical means to selectively extract uranium from these...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/26B01J20/30G21F9/12
CPCB01J20/265G21F9/12
Inventor 马红娟敖浚轩徐晓邢哲张岚李晴暖吴国忠
Owner SHANGHAI INST OF APPLIED PHYSICS - CHINESE ACAD OF SCI