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Method for concentrating radioactive solution by using carbon-based magnetic nano composite material

A technology of magnetic nano and composite materials, applied in radioactive purification, nanotechnology, nuclear engineering, etc., can solve problems such as long-term environmental hazards, large radioactive waste, and human health risks

Active Publication Date: 2021-03-19
ZHEJIANG FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During nuclear fuel reactions, large amounts of radioactive waste are produced and are difficult to dispose of
In addition, the release of radioactive waste into water can cause serious long-term harm to the environment and serious risks to human health

Method used

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  • Method for concentrating radioactive solution by using carbon-based magnetic nano composite material
  • Method for concentrating radioactive solution by using carbon-based magnetic nano composite material
  • Method for concentrating radioactive solution by using carbon-based magnetic nano composite material

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preparation example Construction

[0035] In the present invention, the preparation method of the carbon-based magnetic nanocomposite preferably includes the following steps: mixing the acidic aqueous solution of iron salt and the acidic aqueous solution of graphene oxide, adjusting the pH value of the obtained dispersion system to 12, and stirring, A carbon-based magnetic nanocomposite material is obtained. In the present invention, the iron salt is preferably FeCl 2 4H 2 O and FeCl 3 ·6H 2 O mixture; the FeCl 2 4H 2 O and FeCl 3 ·6H 2 The mass ratio of O is preferably 1:2. In the present invention, the solvent of the acidic aqueous solution of the iron salt is preferably a mixed solution of dilute hydrochloric acid and water; the mass concentration of the acidic aqueous solution of the iron salt is preferably 7-8 g·L -1 . In the present invention, the solvent of the acidic aqueous solution of graphene oxide is preferably a mixed solution of dilute hydrochloric acid and water; the mass concentration o...

Embodiment 1

[0047] At 80°C, under the protection of nitrogen, 400mL containing 0.8g FeCl 2 4H 2 O and 2.2 g FeCl 2 ·6H 2 Slowly add the acidic aqueous solution of O to 1600 mL of the acidic aqueous solution containing 0.5 g of graphene oxide; at 85 ° C, quickly add ammonia water to adjust the pH to about 12, stir at 850 rpm for 60 min, and cool the resulting system to room temperature; Magnetic separation, the solid phase is washed with deionized water to neutrality, and then washed with absolute ethanol, and the obtained graphene oxide-based magnetic nanocomposite modified with ferric oxide is placed in water for standby;

[0048] Under the conditions of 298K and pH 7, the activity concentration of 30mL was 147Bq L -1 Co-60( 60 Co) solution (Co mass concentration about 10mg L -1 ) diluted 10 times to 300mL, the activity concentration of the diluted radioactive solution C 1 14.7Bq L -1 ; Add 0.06g ferric oxide-modified graphene oxide-based magnetic nanocomposite (M-GO) in the dilut...

Embodiment 2

[0055] Adsorption and desorption studies were carried out at 298K and a pH value of about 7; non-radioactive isotope Mn solution, Sr solution, and Co solution were mixed with M-GO solution respectively to obtain 30mL mixed solution, each of which contained 0.06g M-GO; initial concentration C of Mn, Sr and Co in each mixed solution 0 Designed for 10mg·L -1 , each mixed solution was shaken for 1 min to reach adsorption equilibrium; 10 mL of uniform mixed solution was taken, filtered, and the obtained solution was detected by ICP-OES to obtain the equilibrium concentration C of Mn, Sr and Co e ;

[0056] Then, add 0.06mL of high-concentration Al solution to the remaining 20mL of the homogeneously mixed solution (Mn, Sr or Co); the initial concentration of Al in the mixed solution is C 0 Designed as two groups (Al-1 and Al-2), each 10mg L -1 and 15mg·L -1 ; The mixed solution was shaken for 1 min to reach the desorption equilibrium; after filtration, it was detected by ICP-OES...

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Abstract

The invention provides a method for concentrating a radioactive solution by using a carbon-based magnetic nano composite material, and relates to the technical field of separation, purification and concentration. The method provided by the invention comprises the following steps: mixing a carbon-based magnetic nano composite material with a radioactive solution, and performing adsorbing to obtaina first mixed solution, wherein radioactive elements in the radioactive solution are one or more of manganese, strontium and cobalt; carrying out standing or magnetic separation on the first mixed solution, and removing part of the supernatant to obtain a primary concentrated solution; mixing the preliminary concentrated solution with high-valence aluminum ions, and performing desorbing to obtaina second mixed solution; and carrying out solid-liquid separation on the second mixed solution, and removing solid materials to obtain a concentrated solution. The method provided by the invention canrealize rapid and efficient adsorption removal and desorption purification separation of the radioactive elements (manganese, strontium and cobalt), concentrates the solution from low concentration to high concentration, and has good application prospects in the aspects of separation, purification and concentration.

Description

technical field [0001] The invention relates to the technical field of separation, purification and concentration, in particular to a method for concentrating a radioactive solution by using a carbon-based magnetic nanocomposite material. Background technique [0002] As a new type of energy, nuclear energy has always been a concern of countries all over the world for its rapid and efficient treatment and recycling of radioactive waste. During nuclear fuel reactions, large amounts of radioactive waste are produced and are difficult to dispose of. In addition, the release of radioactive waste into water can cause serious long-term harm to the environment and serious risks to human health. [0003] Adsorption is a low-cost, simple, efficient and environmentally friendly wastewater treatment method. Graphene oxide can be used as a high-quality adsorbent because of its unique physicochemical properties, such as high specific surface area, high dispersibility and high potential...

Claims

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Application Information

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IPC IPC(8): G21F9/06G21F9/12B82Y40/00
CPCG21F9/06G21F9/12B82Y40/00
Inventor 陈亮夏新明陈均朗徐一清王志坤
Owner ZHEJIANG FORESTRY UNIVERSITY
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