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Method for concentrating uranium from water solution with uranyl ions

A technology of uranyl ion and aqueous solution, which is applied in the field of enriching uranium, can solve the problems of unsuitability for industrial production, low reuse rate, and short service life, and achieve the effects of high reuse efficiency, low environmental pollution, and low adsorption capacity

Active Publication Date: 2015-09-16
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

[0008] The technical problem to be solved by the present invention is to overcome the defects of low adsorption rate, poor selectivity, low reuse rate, short service life, high production cost and unsuitability for industrial production of uranyl ion adsorption materials in the prior art. Method for enriching uranium from aqueous solution containing uranyl ions

Method used

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  • Method for concentrating uranium from water solution with uranyl ions
  • Method for concentrating uranium from water solution with uranyl ions
  • Method for concentrating uranium from water solution with uranyl ions

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Adsorption of uranyl ions in concentrated seawater by PE grafted polyacrylic acid film material in embodiment 1

[0026] 1. Take 5L of concentrated seawater, in which the concentration of each ion (in terms of elements) is: UO 2 2+ 330ppb, VO 3 - 152ppb, Fe 3+ 141ppb,Co 2+ 5.3ppb, Ni 2+ 101ppb, Cu 2+ 65ppb, Zn 2+ 408ppb, Pb 2+ 34.6ppb, Mg 2+ 1.2×10 5 ppb, Ca 2+ 0.6×10 5 ppb.

[0027] 2. Add 0.1g of PE-grafted polyacrylic acid film material to it, and shake and absorb at room temperature (25°C) for 24 hours.

[0028] 3. Take out the PE grafted polyacrylic acid film material, and test the adsorption capacity of each ion on the PE grafted polyacrylic acid film material as shown in Table 1:

[0029] Table 1 PE grafted polyacrylic acid film material to the adsorption amount table of each ion

[0030]

Embodiment 2

[0031] Adsorption of uranyl ions in seawater by PE grafted polyacrylic acid film material in embodiment 2

[0032] 1. Seawater passes through the PE grafted polyacrylic acid film material at a flow rate of 20ml / min, and is adsorbed at 25°C for 42 days (6 weeks). Among them, the concentration of each ion in seawater is shown in Table 2:

[0033] Table 2 Concentration of each ion in seawater

[0034] the element

U

V

Fe

co

Ni

Cu

Zn

Pb

Mg

Ca

Concentration (ppb)

3.5

1.9

40.6

0.3

1.1

5.4

8.2

31.6

1.2×10 5

0.6×10 5

[0035] 2. Take out the PE grafted polyacrylic acid film material, and test the adsorption capacity of each ion on the PE grafted polyacrylic acid film material, as shown in Table 3:

[0036] Table 3 PE grafted polyacrylic acid film material to the adsorption amount table of each ion

[0037]

Embodiment 3

[0038] Adsorption of uranyl ions in seawater by PE grafted polymethacrylic acid film material in embodiment 3

[0039] 1. Place the PE grafted polymethacrylic acid film material in seawater at 25°C for 50 days, and the concentration of each ion in the seawater is the same as in Example 2.

[0040] 2. Take out the PE grafted polymethacrylic acid film material, wash away the sediment and microorganisms attached to the surface, and test the adsorption capacity of each ion on the PE grafted polymethacrylic acid film material as shown in Table 4:

[0041] Table 4 PE grafted polymethacrylic acid film material to the adsorption amount table of each ion

[0042]

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Abstract

The invention discloses a method for concentrating uranium from a water solution with uranyl ions. The method for concentrating uranium from the water solution with the uranyl ions comprises the following steps that a uranyl ion absorbing material is used for conducting adsorption on the water solution with the uranyl ions; the uranyl ion absorbing material is a material containing a group (please see the formula in the instruction) or (please see the formula in the instruction). According to the method for concentrating uranium from the water solution with the uranyl ions, the low-production-cost uranyl ion absorbing material is used, the uranium element is concentrated from the low concentration uranyl ion water solution, the use of poisonous compound acrylonitrile is avoided, in the production process, the pollution to the environment is small, the adsorption capacity on vanadium is low, the adsorption capacity and the repeating use efficiency of the material can not be lowered even if vanadiumism happens to the material, the adsorption rate is high, the maximum adsorption capacity on the uranium can be as high as 7.57 mg / g, the stability is good, the repeating use efficiency is high, the average capacity loss is only 5% after recycling use for ten times, and the adsorption capacity on the uranium is still very high after the uranyl ion absorbing material is used for one hundred times.

Description

technical field [0001] The invention specifically relates to a method for enriching uranium from an aqueous solution containing uranyl ions. Background technique [0002] In recent years, my country's energy strategy has taken nuclear energy as an important component, and the demand for uranium will increase year by year. According to the medium and long-term development plan of my country's nuclear power, the total installed capacity of nuclear power in my country will reach 86 million kilowatts by 2020, and the demand for natural uranium will be about 8,500 tons. However, my country's terrestrial uranium resources are not rich, and most of them are lean ores. The annual output of natural uranium is only about 700 tons. Therefore, by 2020, my country's uranium fuel gap will reach more than 90%, relying heavily on imports, which poses a serious threat to my country's nuclear energy development. [0003] In addition to terrestrial uranium deposits, there are a large number ...

Claims

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Application Information

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IPC IPC(8): G21F9/04
CPCG21F9/04G21F9/12
Inventor 李景烨张伯武马红娟刘西艳凌长见杨晓娟虞鸣张阔
Owner SHANGHAI INST OF APPLIED PHYSICS - CHINESE ACAD OF SCI
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