Uranium adsorbent and preparation method and application thereof

An adsorbent and organic solvent technology, applied in the field of uranium adsorbent and its preparation, can solve the problems of limited industrial application and promotion, low adsorption capacity, poor mechanical strength, etc., and achieves low cost, high adsorption capacity, and increased hydrophilicity. Effect

Active Publication Date: 2021-08-10
EAST CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the current adsorption materials still have the problems of poor mechanical strength and low adsorption capacity, which limit their industrial application and promotion.

Method used

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  • Uranium adsorbent and preparation method and application thereof
  • Uranium adsorbent and preparation method and application thereof
  • Uranium adsorbent and preparation method and application thereof

Examples

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preparation example Construction

[0030] The invention provides a preparation method of uranium adsorbent, comprising the following steps:

[0031] The inorganic alkaline solution is mixed with the jute fiber for pretreatment to obtain the pretreated jute fiber matrix material;

[0032] Under an inert atmosphere, the pretreated jute fiber matrix material, acid chloride derivatives and organic solvents are mixed for chloroacetylation to obtain chloroacetylated jute fibers;

[0033] Under an inert atmosphere, mix hydroxylamine hydrochloride, an inorganic base and an organic solvent, heat, then mix with polyacrylonitrile for oximation to obtain oximated polyacrylonitrile;

[0034] The chloroacetylated jute fiber, the oximated polyacrylonitrile and an organic solvent are mixed for grafting reaction to obtain the uranium adsorbent.

[0035] In the present invention, unless otherwise specified, the raw materials used are all commercially available products in this field.

[0036] The invention mixes the inorganic ...

Embodiment 1

[0074] Add 45mL of deionized water and 5.00g of sodium hydroxide to a 250mL three-neck flask to configure a 10wt% alkali solution, immerse 4.55g of jute fiber in the above alkali solution, and keep the mixture at 50°C for 2 hours. After fully washing the jute fiber with deionized water, dry it in a blast drying oven for later use.

[0075] In an inert atmosphere, dissolve 100mmol of hydroxylamine hydrochloride in 100mL of N,N-dimethylacetamide. After the solid is completely dissolved, add 100mmol of sodium hydroxide to the mixture, and stir well to form a suspension. Subsequently, the temperature of the mixed liquid was raised to 60°C, and then 85 mesh, 120 mmol polyacrylonitrile powder was gradually added to the above mixed liquid, reacted for 6 hours at a stirring speed of 500 r / min, and then cooled to room temperature. Finally, the mixed solution was centrifuged to remove insoluble matter, and the obtained supernatant was directly poured into deionized water to precipitate ...

Embodiment 2

[0085] Add 45mL of deionized water and 24.23g of potassium hydroxide to a 250mL three-necked flask to configure a 35wt% alkali solution, immerse 12.12g of jute fibers in the above alkali solution, and keep the mixture at 90°C for 12 hours. After fully washing the jute fiber with deionized water, dry it in a blast drying oven for later use.

[0086] In an inert atmosphere, dissolve 100mmol of hydroxylamine hydrochloride in 100mL of N,N-dimethylformamide. After the solid is completely dissolved, add 100mmol of sodium hydroxide to the mixture, and stir well to form a suspension. Subsequently, the temperature of the mixed liquid was raised to 100°C, and then 150 mesh, 200 mmol polyacrylonitrile powder was gradually added to the above mixed liquid, reacted for 12 hours at a stirring speed of 1000 r / min, and then cooled to room temperature. Finally, the mixed solution was centrifuged to remove insoluble matter, and the obtained supernatant was directly poured into deionized water to...

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Abstract

The invention provides a uranium adsorbent and a preparation method and application thereof, and belongs to the technical field of polymer modification. The invention provides a uranium adsorbent preparation method, which comprises: mixing an inorganic alkaline solution and jute fibers, and carrying out pretreatment to obtain a pretreated jute fiber matrix material; in an inert atmosphere, mixing the pretreated jute fiber base material, an acyl chloride derivative and an organic solvent, and carrying out chloroacetylation to obtain chloroacetylated jute fibers; in an inert atmosphere, mixing hydroxylamine hydrochloride, inorganic alkali and an organic solvent, heating, mixing with polyacrylonitrile, and performing oximation to obtain oximated polyacrylonitrile; and mixing the chloracetylated jute fibers, oximated polyacrylonitrile and an organic solvent, and carrying out a grafting reaction to obtain the uranium adsorbent. The uranium adsorbent prepared by the invention has high strength and also has excellent uranium adsorption performance.

Description

technical field [0001] The invention relates to the technical field of polymer modification, in particular to a uranium adsorbent and its preparation method and application. Background technique [0002] Energy and the environment are two major issues facing mankind today. Nuclear energy, as a clean and efficient new energy source, has become one of the biggest contributors to carbon-free emissions. However, the radioactive wastewater generated during the development and utilization of nuclear energy and nuclear technology seriously threatens human health and the ecological environment. Therefore, the enrichment and separation of uranium in wastewater is necessary, both from the perspective of environmental protection and resource utilization. [0003] The adsorption method has become the most effective and commonly used method for enriching and separating uranium from water due to its advantages of simple operation, less environmental pollution, and high economic benefits. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26B01J20/30C02F1/28C02F103/08
CPCB01J20/265B01J20/24B01J20/22C02F1/288C02F1/286C02F1/285C02F2103/08C02F2101/006
Inventor 米智明张德行刘志晓刘靖刘清安在旭黄宸杰毕诗曼高茜钰
Owner EAST CHINA UNIV OF TECH
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