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Magnetic adsorbent as well as preparation thereof and treatment method to actinide element waste liquid

A technology of magnetic adsorbent and actinide elements, which is applied in the direction of adsorption of water/sewage treatment, chemical instruments and methods, magnetic field/electric field water/sewage treatment, etc., which can solve the cumbersome material preparation process, high synthesis operation requirements, and harsh reaction conditions and other problems to achieve the effect of convenient operation, shortened operation cycle and high separation efficiency

Active Publication Date: 2019-02-12
INST OF NUCLEAR PHYSICS & CHEM CHINA ACADEMY OF
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the disadvantages of similar work are that the material preparation process is cumbersome, the synthesis operation requirements are high, and harsh reaction conditions are often required.
In addition, the excessive consumption of organic solvents is also likely to cause secondary pollution and higher production costs

Method used

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  • Magnetic adsorbent as well as preparation thereof and treatment method to actinide element waste liquid
  • Magnetic adsorbent as well as preparation thereof and treatment method to actinide element waste liquid
  • Magnetic adsorbent as well as preparation thereof and treatment method to actinide element waste liquid

Examples

Experimental program
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Effect test

Embodiment 1

[0040] The present embodiment is the preparation method of magnetic adsorbent, comprising the following steps:

Embodiment 11

[0042] 0.1 g polydopamine / silica-coated magnetic microspheres were dispersed in 9.5 mmol / L-20.5 mmol / L aqueous solution of 100 mL trishydroxymethylaminomethane, and 0.1 g aminoethylphosphonic acid ligand was added slowly, Adjust the pH range of the solution to 8.5~10.0, and control the temperature of the system at 60°C~70°C, first conduct the heating and reflux reaction for 4.0h~6.0h, and then stir overnight at room temperature. The magnetic adsorbent in the suspension was separated by a magnet, washed alternately with water and ethanol, and then vacuum-dried at 60°C for 12 h to obtain the desired magnetic adsorbent with a core-shell structure. The transmission electron microscope pictures of the magnetic adsorbent are shown in figure 1 As shown, it can be clearly observed that the magnetic adsorbent has a double-layer core-shell structure, the thickness of the inner silica shell is 20 nm, and the thickness of the outer polydopamine shell is 20 nm. However, the organic ligan...

Embodiment 12

[0044] The amount of 0.1 g polydopamine / silica-coated magnetic microspheres dispersed in 9.5 mmol / L~20.5 mmol / L tris aqueous solution is 80 mL and 120 mL respectively, and other operating steps are the same as in the examples 1.1. Compared with Example 1.1, the morphology of the prepared magnetic adsorbent with core-shell structure has no obvious change.

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Abstract

The invention discloses a magnetic adsorbent as well as preparation thereof and a treatment method to actinide element waste liquid. The preparation technology of the magnetic adsorbent is easy, the operation condition is moderate, an organic ligand is combined with a magnetic nano material through polydopamine chemistry, a magnetic composite microbead with a double-layer core-shell structure is built, and the problems that a traditional adsorb ant is hard to achieve solid and liquid separation, the synthesis steps are complex, consumption of the organic solvent is high are solved. The magnetic adsorbent has good adsorption property on actinide elements in the weak acid environment, the separation speed is high, and the adsorbent can be easily recycled, and has important practical meaningon purification and recycling of post-treated radioactive waste liquid of nuclear fuel.

Description

technical field [0001] The invention belongs to the field of resource utilization and environmental protection, and in particular relates to a magnetic adsorbent, its preparation and a method for treating actinide waste liquid. Background technique [0002] With the rapid development of nuclear energy, it is inevitable to accumulate a large amount of radioactive waste liquid in nuclear facility activities related to nuclear energy development and weapon development. It has the characteristics of strong radioactivity, high toxicity and long half-life, and constitutes a long-term radioactive hazard to humans and the natural environment. Therefore, it is of great practical significance to study economical, green, and efficient separation materials and technologies to achieve efficient separation of actinides in the fields of nuclear fuel reprocessing and environmental protection. [0003] In recent years, solid-phase extraction technology has shown a good application prospect ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26B01J20/28C02F1/28C02F1/48B01J20/30
CPCB01J20/103B01J20/26B01J20/28009B01J20/28019C02F1/288C02F1/48
Inventor 吴奉承杨楚汀韩军胡胜罗阳明刘易
Owner INST OF NUCLEAR PHYSICS & CHEM CHINA ACADEMY OF
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