Magnetic Prussian blue-like materials and their preparation and application of adsorbing cesium ions

A technology similar to Prussian blue and cesium ions, applied in the direction of radioactive purification, other chemical processes, chemical instruments and methods, etc., can solve problems that have not been fundamentally solved, and achieve high adsorption and separation efficiency, simple preparation method, and mild reaction conditions Effect

Active Publication Date: 2021-12-28
SUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The fixed loading method is for the purpose of fixed loading and anti-filtration rather than purifying the soil, which does not fundamentally solve the problem

Method used

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  • Magnetic Prussian blue-like materials and their preparation and application of adsorbing cesium ions
  • Magnetic Prussian blue-like materials and their preparation and application of adsorbing cesium ions
  • Magnetic Prussian blue-like materials and their preparation and application of adsorbing cesium ions

Examples

Experimental program
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Effect test

Embodiment 1

[0046] This embodiment provides a method for preparing a magnetic Prussian blue material, the steps are as follows:

[0047] FeCl was mixed under mechanical stirring 3 (1.41g, 8.7mmol) and FeCl 2 4H 2 O (0.86 g, 4.3 mmol) was dissolved in 30 mL of deionized water. Then, under the protection of argon, the temperature was raised to 80° C. for 30 min, and then 5 mL of acetone containing 100 mg of oleic acid was added to the solution. After 10 min, 10 mL of aqueous ammonia (28 wt%) was added dropwise to the solution. After 10 min, 1 g of oleic acid was added dropwise to the mixture. After reacting for 30min, the product was precipitated with 2M hydrochloric acid and washed with acetone cleaning. It was then redispersed in an ammonia solution of oleic acid (30 mL of deionized water, 2 mL of ammonia water and 1 g of oleic acid) to obtain a magnetic fluid. Calculation of Fe in ferrofluid by weighing method 3 o 4 The content is about 0.005g / mL.

[0048] Add 10 mL of the abo...

Embodiment 2

[0055] This embodiment provides the method for adsorbing cesium ions in clay by the magnetic Prussian blue material in embodiment 1, the steps are as follows:

[0056] (1) Chitosan hydrochloride was dissolved in deionized water to prepare a chitosan hydrochloride aqueous solution with a concentration of 20 mg / mL, which was used as the eluent of cesium-contaminated clay (montmorillonite). 0.1 g of cesium-contaminated clay was eluted with 10 mL of eluent, and after desorption for 2 hours, the clay was centrifuged from the eluent.

[0057] (2) Add 10 mg of the magnetic Prussian blue-like material prepared in Example 1 to the eluent to adsorb and enrich the cesium ions in the solution. The adsorption time is 2 hours, and finally the adsorbed material is sucked out from the solution with a magnet. The above operations are defined as group (A).

[0058] For comparison, other three groups of treatments were carried out according to the above method: (B) in step (1), after chitosan h...

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Abstract

The invention relates to a magnetic Prussian blue material and its preparation and application of cesium ions. The preparation method comprises the following steps: under the action of a thermal initiator, Fe 3 o 4 Nanoparticles react with pyridine compounds containing carbon-carbon double bonds, unsaturated aromatic hydrocarbons and oil-soluble cross-linking agents in water, and after the reaction is complete, polymer-wrapped magnetic nanoparticles are obtained; the magnetic nanoparticles are mixed with pentacyanide The monoammine ferrite undergoes a ligand exchange reaction to obtain the magnetic Prussian blue-like material. The magnetic Prussian blue-like material of the present invention can be used to adsorb cesium ions in soil, especially clay, and combined with the pretreatment of cationized chitosan on clay, the adsorption efficiency of cesium ions is high, and efficient purification of soil can be realized.

Description

technical field [0001] The invention relates to the field of radioactive element adsorption materials, in particular to a magnetic Prussian blue-like material and its preparation and application for adsorbing cesium ions. Background technique [0002] The occurrence of nuclear accidents will result in the leakage of a large amount of radionuclides, including cesium-137, which has the characteristics of long half-life, high radioactivity, high solubility, and high activity. In addition to water pollution caused by nuclear accidents, a large amount of radioactive cesium will be released into the atmosphere and eventually settle to the surface, and then be attached to the surface soil, polluting the soil, restricting the use of land, and affecting the development of agriculture and animal husbandry. In addition, cesium ions will replace potassium and interact with clay minerals, resulting in almost irreversible binding to the soil. About 80% of the radioactive cesium that fall...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/26B01J20/28G21F9/28B01J20/30
CPCB01J20/06B01J20/265B01J20/28009G21F9/28B01J20/28047
Inventor 华道本钱骏
Owner SUZHOU UNIV
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