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A kind of phosphoric ester group-containing chelating resin and the method for preparing and treating uranium-containing wastewater

A chelating resin, phosphate-based technology, which is applied in water/sewage treatment, chemical instruments and methods, water/sewage multi-stage treatment, etc. problems such as improvement, to achieve the effects of simple preparation method, fast adsorption speed and easy operation

Active Publication Date: 2021-11-30
EAST CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it must be pointed out that the above materials still have the following deficiencies when they are used as adsorption media to treat uranium-containing wastewater: (1) The adsorption capacity of uranium in aqueous solution still needs to be improved; (2) The preparation method is relatively cumbersome.
These shortcomings largely limit the further large-scale industrial application of these adsorbent materials in the field of uranium-containing wastewater treatment.

Method used

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  • A kind of phosphoric ester group-containing chelating resin and the method for preparing and treating uranium-containing wastewater

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Chelating resins containing phosphate groups can be prepared by solvothermal method, as a typical synthetic example: 0.5g triallyl phosphate and 0.05g azobisisobutyronitrile are added to 5mL ethyl acetate, stirred at 25°C for 1h , put the above solution into a hydrothermal reaction kettle, react at 100°C for 24h, take it out, open the kettle, remove ethyl acetate by rotary evaporation, and vacuum dry at 45°C for 12h to obtain phosphonic acid-containing chelating resin 1.

Embodiment 2

[0034] Accurately pipette 50mL, 100mg / L uranium standard solution into a 150mL Erlenmeyer flask, use 12mol / L nitric acid, 1mol / L NaOH solution and 5mol / L NaOH solution to adjust the pH value of the uranium solution to make the solution pH is 4.5. Add 0.010 g of adsorbent 1, and adsorb for 3 hours at 25 ° C, 135 r / min constant temperature oscillator. Filter and separate, use ICP to carry out spectral analysis, measure the uranium ion concentration in the filtrate, use the formula (1) to calculate the adsorption capacity at this time to be 210mg / g.

[0035] The adsorption amount of uranium ions was calculated according to the following formula:

[0036]

[0037] In the formula: q e —Adsorption capacity, mg / g; V—volume of solution, L; C e —Equilibrium concentration of uranium ion solution, mg / L; C 0 —Initial concentration of uranium ion solution, mg / L; m—mass of adsorbent, g.

Embodiment 3

[0039] Accurately pipette 50mL, 100mg / L uranium standard solution into a 150mL Erlenmeyer flask, use 12mol / L nitric acid, 1mol / L NaOH solution and 5mol / L NaOH solution to adjust the pH value of the uranium solution to make the solution pH for 3. Add 0.010 g of adsorbent 1, and adsorb for 3 hours at 25 ° C, 135 r / min constant temperature oscillator. Filter and separate, use ICP to carry out spectral analysis, measure the uranium ion concentration in the filtrate, use the formula (1) to calculate the adsorption amount at this time to be 120mg / g.

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Abstract

The invention relates to a phosphoric acid ester-containing chelating resin. A polymer adsorbent is prepared by solvothermal polymerization of triallyl phosphate. The preparation method comprises the following steps: mixing 0.5-2 g of triallyl phosphate and 0.05 g of Add azodiisobutyronitrile into 1-15 ml organic solvent, stir at 25°C for 1-3 hours, add the above solution into a hydrothermal reaction kettle, react at 100°C for 24 hours, take it out, open the kettle, and remove it by rotary evaporation Organic solvent, vacuum drying at 45°C for 12 to 24 hours to obtain a chelating resin containing phosphate groups, a method for treating uranium-containing wastewater with a chelating resin containing phosphate groups, adjusting the pH value of the uranium-containing aqueous solution to be treated to 1 ~7, then add chelating resin adsorbent containing phosphate group, shake and absorb. The chelating resin containing phosphonic acid groups prepared by the invention has the advantages of simple preparation method, convenient operation, less by-products, reusability and the like.

Description

[0001] field of invention [0002] The invention belongs to a phosphoric ester group-containing chelating resin adsorbent and a method for preparing and treating uranium-containing wastewater. Background technique [0003] Nuclear energy is an important way to solve the energy shortage in the world today. With the rapid development of nuclear power, the demand for nuclear fuel in the nuclear industry is increasing day by day. Uranium is currently the main nuclear fuel. During the development and utilization of uranium resources, a large amount of uranium-containing radioactive wastewater will be generated, which seriously pollutes the ecological environment. Therefore, it is very necessary and urgent to study the high-efficiency separation and enrichment technology of uranium. At present, the commonly used methods mainly include solvent extraction, chemical precipitation, foam flotation, liquid film enrichment and evaporation concentration. Compared with these methods, the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/26B01J20/30C02F9/04
CPCB01J20/26C02F1/285C02F1/66C02F2101/006
Inventor 袁定重张庆华张世傲陈林隆王云何妍孔令会
Owner EAST CHINA UNIV OF TECH