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Magnetic nano functional material for extracting uranium from seawater, and preparation method thereof

A technology of magnetic nano and functional materials, applied in seawater treatment, chemical instruments and methods, water pollutants, etc., can solve the problems of low adsorption capacity, easy agglomeration and sedimentation, and low stability, and achieve good and stable magnetic properties Durable, suitable for pH range, good effect of biological resistance

Active Publication Date: 2019-04-05
LANZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problems of easy agglomeration and sedimentation caused by using magnetic nanoparticles as the adsorbent, and the problems of low adsorption capacity and low stability of the existing composite nano-adsorbent, the present invention researches and develops a , easy solid-liquid / solid-solid separation, high adsorption capacity (q max pH6.5=350mg / L) magnetic nano-functional material, and it can be used for the purification of uranium-containing wastewater and the extraction of uranium in simulated seawater, with high specific selectivity, biological resistance and stability

Method used

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  • Magnetic nano functional material for extracting uranium from seawater, and preparation method thereof
  • Magnetic nano functional material for extracting uranium from seawater, and preparation method thereof
  • Magnetic nano functional material for extracting uranium from seawater, and preparation method thereof

Examples

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Embodiment 1

[0036] A method for preparing a magnetic nano functional material for extracting uranium from seawater, comprising the following steps:

[0037] Step 1: Weigh ferric chloride hexahydrate and trisodium citrate dihydrate and dissolve them in ethylene glycol, then add anhydrous sodium acetate to it to control ferric chloride hexahydrate, trisodium citrate dihydrate and anhydrous sodium acetate The molar ratio is 3:1:16, heated and stirred to dissolve, refluxed at 70°C and stirred for 30-60 minutes, then transferred to a reaction kettle at 160-200°C for 8-12 hours, and naturally cooled to room temperature after the reaction , magnetically separated, washed, and dried to obtain black magnetic Fe 3 o 4 particles;

[0038] Step 2: Take Magnetic Fe 3 o 4 The particles are dispersed in the mixed solution A composed of ethanol, water and ammonia water, the volume ratio of ethanol, water and ammonia water in A is 75:5:4, the concentration of ammonia water is 28wt.%. 3 o 4 The mass ...

Embodiment 2

[0044] Fe 3 o 4 @s-TiO 2 - The preparation method of AO is the same as that of Example 1, wherein, in step 2, the volume ratio of ethanol, water and ammonia water in the mixed solution A is 85:5:4, and the concentration of ammonia water is 28wt.%; tetraethyl silicate The volume ratio with ethanol is 1:90. In Step 3, the volume ratio of ethanol to ammonia water in the mixed solution B is 250:1. In step 4, the reaction temperature of the high-temperature furnace in the autoclave was set at 150° C. for 24 hours. In step five, the addition of crosslinking agent N, N'-methylenebisacrylamide and potassium persulfate is 8% of the total mass of reactants in step five. The consumption of all the other materials is all the same as in Example 1.

Embodiment 3

[0046] Fe 3 o 4 @s-TiO 2 - The preparation method of AO is the same as that of Example 1, wherein, in step 2, the volume ratio of ethanol, water and ammonia water in the mixed solution A is 90:5:4, and the concentration of ammonia water is 28wt.%; tetraethyl silicate The volume ratio with ethanol is 1:180. In Step 3, the volume ratio of ethanol to ammonia water in the mixed solution B is 1000:3. In step 4, the reaction temperature of the high-temperature furnace in the autoclave was set at 200° C. for 16 hours. In step five, the addition of crosslinking agent N, N'-methylenebisacrylamide and potassium persulfate is 10% of the total mass of reactants in step five. The consumption of all the other materials is all the same as in Example 1.

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Abstract

The invention discloses a magnetic nano functional material for extracting uranium from seawater, and a preparation method thereof. The preparation method includes the following steps: step 1, reacting ferric chloride hexahydrate with trisodium citrate dihydrate to obtain Fe3O4 particles; step 2, preparing Fe3O4@SiO2 particles through a compound reaction; step 3, dispersing Fe3O4@SiO2 in a mixed solution of ethanol and ammonium hydroxide, adding titanium isopropoxide, and obtaining Fe3O4@SiO2@TiO2 particles after reaction; step 4, dispersing Fe3O4@SiO2@TiO2 in an NaOH solution, and performingcalcination after reaction to obtain Fe3O4@s-TiO2 particles with developed surfaces; step 5, dispersing Fe3O4@s-TiO2 in acetic acid, adding a crosslinking agent, and carrying out an oil bath reactionto obtain cyanated Fe3O4@s-TiO2-CN particles; step 6, dispersing Fe3O4@s-TiO2-CN in a mixed solution of methanol and water, adding hydroxylamine hydrochloride, adjusting the pH of the solution to 7, and carrying out an oil bath reaction to obtain amidoximated Fe3O4@s-TiO2-AO particles. The Fe3O4@s-TiO2-AO material prepared by the preparation method has a developed surface, good magnetic properties, high stability, durability and bio-resistance and excellent adsorption selectivity for the uranium, and can be used for eliminating the uranium in uranium-containing water bodies and extracting theuranium from the seawater.

Description

technical field [0001] The invention belongs to the technical field of preparation of nanometer materials, and in particular relates to a magnetic nanometer functional material for extracting uranium from seawater and a preparation method thereof. Background technique [0002] Uranium resources are the basic resources for the development of the nuclear industry and the strategic resources for the country's nuclear energy development. Under the background of the current rapid development of nuclear energy, the issue of nuclear fuel uranium security has become increasingly prominent. my country has proven reserves of uranium resources of about 200,000 tons, ranking tenth in the world. However, as the most populous country in the world, my country has a large demand for energy, but the per capita possession is very small. Therefore, the development and utilization of unconventional uranium resources is conducive to ensuring the sustainable development of nuclear energy and ener...

Claims

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Application Information

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IPC IPC(8): B01J20/28B01J20/06B01J20/30C02F1/28C02F101/00C02F103/08
CPCB01J20/06C02F1/281B01J20/28007B01J20/28009C02F2103/08C02F2101/006
Inventor 潘多强赵敏唐俊豪胡亚蒙孙亚楼范富有吴王锁
Owner LANZHOU UNIVERSITY
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