Uranium extraction from seawater adsorbent with antibacterial property and preparation method thereof

An adsorbent and seawater technology, applied in chemical instruments and methods, other chemical processes, physical treatment, etc., can solve the problems of not being able to be reused for a long time, the loss of active adsorption groups, and the reduction of uranium extraction effect, and the reaction conditions can be easily controlled , Improve adsorption efficiency, low price effect

Active Publication Date: 2017-06-27
INST OF NUCLEAR PHYSICS & CHEM CHINA ACADEMY OF
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Corrosion of the adsorbent matrix material by marine microorganisms will lead to the loss of adsorption active groups and the reduction of the strength of the substrate, resulting in reduced uranium extraction effect and cannot be reused for a long time

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Add 70 parts of acrylonitrile, 50 parts of methacrylic acid, 80 parts of 10% ZnO aqueous dispersion and 10 parts of natural wool fiber into the reactor and mix well; after sealing the reactor with tin foil, place it under the electron beam Irradiate for 6 hours with an irradiation dose of 300 kGy; after the irradiation is completed, soak the irradiated product with an acetone solution at 40°C to remove unreacted reagents and homopolymers; obtain an intermediate product after drying; take 2 parts of the grafted product Place in 100 parts of hydroxylamine hydrochloride methanol aqueous solution, and react at a constant temperature at 90 °C for 8 h. After the reaction, wash the amidoximation product with methanol aqueous solution, dry it at 40 °C and store it. The obtained adsorbent has an inhibition rate of 87% for Escherichia coli and 95% for Staphylococcus aureus; the saturated adsorption capacity for uranyl is 73.5mg / g.

Embodiment 2

[0032] Add 50 parts of acrylonitrile, 30 parts of acrylic acid, 10 parts of 10% ZnO aqueous dispersion, and 10 parts of polyethylene fiber into the reactor and mix well; seal the reactor with tin foil, and place it under electron beam irradiation 2 hours, the irradiation dose is 50kGy; after the irradiation is completed, soak the irradiated product with acetone solution at 40°C to remove unreacted reagents and homopolymers; obtain an intermediate product after drying; take 2 parts of the grafted product and place it under 20 Parts of hydroxylamine hydrochloride methanol aqueous solution, at 40 ℃, constant temperature reaction for 6h, after the reaction was completed, the amidoximation product was washed with methanol aqueous solution, dried at 40 ℃ and stored. The obtained adsorbent has an inhibition rate of 80% for Escherichia coli and 85% for Staphylococcus aureus; the saturated adsorption capacity for uranyl is 45.5mg / g.

Embodiment 3

[0034] Add 50 parts of acrylonitrile, 55 parts of methyl acrylate, 60 parts of 10% ZnO aqueous dispersion, and 10 parts of polypropylene fiber into the reactor and mix well; after sealing the reactor with tin foil, place it under the electron beam Irradiate for 5 hours, and the irradiation dose is 180kGy; after the irradiation is completed, soak the irradiated product with acetone solution at 40°C to remove unreacted reagents and homopolymers; obtain an intermediate product after drying; take 2 parts of the grafted product React in 65 parts of hydroxylamine hydrochloride methanol aqueous solution at 70°C for 5 hours at a constant temperature. After the reaction, wash the amidoximation product with methanol aqueous solution, dry it at 40°C and store it. The obtained adsorbent has an inhibitory rate of 83.5% to Escherichia coli and a 91% inhibitory rate to Staphylococcus aureus; the saturated adsorption capacity of uranyl is 51.5 mg / g.

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Abstract

The invention discloses a uranium extraction from seawater adsorbent with antibacterial property and a preparation method thereof. The uranium extraction from seawater adsorbent comprises the following ingredients in parts by weight: 10 parts of basic materials, 50-70 parts of acrylonitrile, 30-50 parts of an acrylic acid reagent, 5-80 parts of metallic oxide aqueous dispersion and 10-50 parts of hydroxylamine hydrochloride methanol aqueous solution. The preparation method comprises the following steps: performing a grafting reaction on basic materials, acrylonitrile, an acrylic acid reagent and metallic oxide aqueous dispersion under the condition of co-radiation; performing amidoximation under a neutral and alkaline environment, so as to obtain the uranium extraction from seawater adsorbent with antibacterial property. The antibacterial rates of the uranium extraction from seawater adsorbent with antibacterial property obtained by the invention to golden yellow staphylococcocci and escherichia coli reach 95% and 90% respectively; due to the synergistic effect of metallic oxides and amidoxime groups, the adsorbing capacity is improved by 131%. In the uranium extraction from seawater adsorbent with antibacterial property, animal hairs and synthetic fibers are taken as the basic materials, so that the sources of the materials are wide, and the cost of the materials is low; co-radiation grafting is adopted in the preparation processes, and any initiator does not need to be added, therefore, the preparation cost is effectively lowered.

Description

technical field [0001] The invention relates to an adsorbent with antibacterial performance for extracting uranium from seawater and a preparation method thereof. Background technique [0002] At present, there are about 5.9 million tons of proven uranium mines on land, and these uranium mines will be exhausted in the next 87 years if new and proposed nuclear power plants are not considered [Leggett C J, Endrizzi F, Rao L. ScientificBasis for Efficient Extraction of Uranium from Seawater, II: Fundamental Thermodynamic and Structural Studies. Industrial & Engineering Chemistry Research, 2015, 55(15): 4257-4263.]. my country's uranium demand in 2012 has reached 6,550 tons [Cui Na, Wang Yongping. Uranium foreign dependence and nuclear power development. China Nuclear Industry, 2014, 8: 013.], while my country's own uranium production is only 1,500 tons, and my country has proven China's terrestrial uranium resource reserves are only 200,000 tons. Because uranium is the only ma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/24B01J20/26B01J20/28B01J20/30C22B60/02D06M10/06
CPCB01J20/06B01J20/24C22B60/0217D06M10/06D06M16/00B01J20/264B01J20/28011B01J20/28028
Inventor 李巧钰文君程海明胡胜汪小琳张樊刘博煜陈柏华熊洁
Owner INST OF NUCLEAR PHYSICS & CHEM CHINA ACADEMY OF
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