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Application of a Modified Cellulose Material in Enrichment of Artificial Radionuclides

A radionuclide and cellulose technology, which is applied in the application field of modified cellulose materials in the enrichment of artificial radionuclides, can solve the problems of low concentration, difficult enrichment of nuclides, and long enrichment time, and achieve the goal of reducing Time cost, simple preparation method, rapid enrichment and effective effect

Active Publication Date: 2021-04-06
TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The water body in the ocean is huge, the artificial radionuclide diffuses quickly and the concentration is relatively low, and it is difficult to monitor the artificial radionuclide pollution in the event of a nuclear accident
In the existing technology, the concentration of K nuclides in seawater can be directly analyzed, and the rapid enrichment of radium nuclides can be realized. Due to the influence of high salt concentration in seawater, the rapid enrichment and monitoring of other nuclides is still a problem, especially Little research has been done on the artificial radionuclides zirconium and cerium
There are two major difficulties in the monitoring of artificial radionuclides in the ocean: one is that it is difficult to enrich nuclides in seawater
The second is that the enrichment time is too long, it takes about three to four days, and it is difficult to meet the requirements of rapid monitoring when a nuclear leakage accident actually occurs
[0003] At present, no material has been reported that can rapidly enrich the artificial radionuclides zirconium and cerium in the ocean
However, factors such as complex seawater environment, huge water bodies, fast diffusion of artificial radionuclides and relatively low concentrations make the enrichment of artificial radionuclides in the ocean a difficult problem.

Method used

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  • Application of a Modified Cellulose Material in Enrichment of Artificial Radionuclides
  • Application of a Modified Cellulose Material in Enrichment of Artificial Radionuclides

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] This embodiment provides a modified cellulose material, the preparation method of which is as follows:

[0030] The corn cob cellulose and phosphorus pentoxide are added into the ball milling tank at a mass ratio of 1:2, the catalyst methanesulfonic acid is added, and N,N-dimethylformamide is added into the ball milling tank, the corn cob fiber The weight-to-volume ratio of element and the methanesulfonic acid is 3:1 (g / ml), and the weight-to-volume ratio of the corncob cellulose to the N,N-dimethylformamide is 1:20 (g / ml) ml), set the ball milling time to 8 h; after the ball milling is completed, the product is washed with deionized water until neutral, and freeze-dried to obtain a modified cellulose material.

Embodiment 2

[0032] In this example, the modified cellulose material prepared in Example 1 is used to enrich zirconium and cerium in simulated seawater, and the specific operations are as follows:

[0033] With simulated seawater as solvent, configure 100mL containing Ce 4+ or Zr 4+ Add 0.05g of modified cellulose material, and stir magnetically for 30 minutes. After the reaction, filter the sample with a 0.22um filter membrane, and use an inductively coupled plasma emission spectrometer to measure the concentration of the solution before and after adsorption.

[0034] Phosphorous groups in the modified cellulose material react with radionuclides, Ce 4+ The concentration of Zr decreased from 10.36ppm before adsorption to 0.18ppm after adsorption; Zr 4+ The concentration decreased from 10.91ppm before adsorption to 5.12ppm after adsorption.

Embodiment 3

[0036] In this example, the modified cellulose material prepared in Example 1 is used to enrich zirconium and cerium in simulated seawater, and the specific operations are as follows:

[0037] With simulated seawater as solvent, configure 100mL containing Ce 4+ or Zr 4+ Add 0.1 g of modified cellulose material, and stir magnetically for 30 minutes. After the reaction, filter the sample with a 0.22um filter membrane, and use an inductively coupled plasma emission spectrometer to measure the concentration of the solution before and after adsorption.

[0038] Phosphorous groups in the modified cellulose material react with radionuclides, Ce 4+ The concentration of Zr decreased from 10.36ppm before adsorption to 0.11ppm after adsorption; Zr 4+ The concentration decreased from 10.91ppm before adsorption to 2.71ppm after adsorption.

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Abstract

The present invention relates to the field of radionuclide enrichment, in particular to the application of a modified cellulose material in the enrichment of artificial radionuclide; the modified cellulose material described in the present invention can realize fast, efficient and selective enrichment The nuclides zirconium, cerium, iron, zinc, lead, strontium, magnesium, barium, and calcium in the ocean, especially the enrichment of artificial radionuclides cerium and zirconium, are fast and efficient, which greatly reduces the time cost, and can be applied in offshore In addition to routine monitoring of zirconium nuclide and cerium nuclide pollution in the region, it can also be applied to emergency monitoring of artificial radionuclide zirconium ions and cerium ions in the ocean when a nuclear accident breaks out. At the same time, the modified cellulose material of the present invention can also enrich various nuclides in fresh water, including but not limited to the following: zinc, iron, zirconium, cerium, lead, strontium, magnesium, barium, calcium.

Description

technical field [0001] The invention relates to the field of enrichment of radionuclides, in particular to the application of a modified cellulose material in the enrichment of artificial radionuclides. Background technique [0002] At the present stage, the nuclear energy industry is developing rapidly, and potential nuclear accidents have increased the pressure of nuclear pollution in coastal areas. The water body in the ocean is huge, the artificial radionuclide diffuses quickly and the concentration is relatively low, and it is difficult to monitor the artificial radionuclide pollution in the event of a nuclear accident. In the existing technology, the concentration of K nuclides in seawater can be directly analyzed, and the rapid enrichment of radium nuclides can be realized. Due to the influence of high salt concentration in seawater, the rapid enrichment and monitoring of other nuclides is still a problem, especially Little research has been done on the artificial ra...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01T7/02G21F9/12
CPCG01T7/02G21F9/12
Inventor 黄勇王婷张同玲李金培吴敏
Owner TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI