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A method for enriching uranium from an aqueous solution containing uranyl ions
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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: 2017-11-17
SHANGHAI INST OF APPLIED PHYSICS - CHINESE ACAD OF SCI
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[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
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[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.
[0028] 3. Take out the PE grafted polyacrylic acidfilm 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] 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
A method for enriching uranium from an aqueous solution containing uranyl ions, comprising the following steps: adsorbing an aqueous solution containing uranyl ions with a uranylion adsorbing material; and the uranyl ion absorbing material is a material containing a group. A low-production-cost uranyl ion adsorbing material is used for enriching the uranium element from a low concentration uranyl ion aqueous solution, avoiding the use of the toxic compound acrylonitrile, with low pollution to the environment in the production process and a low adsorption capacity for vanadium; the adsorption capacity and the re-use efficiency of the material cannot be reduced because of the vanadium poisoning of the material; the adsorption rate is high; the maximum adsorption capacity for uranium can be as high as 7.57 mg / g; the stability is good and the re-use efficiency is high; and the average adsorption capacity loss is only 5% after 10 times of recycling use, and the adsorption capacity for uranium is still very high after 100 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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Patent Type & Authority Patents(China)
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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