A polyamidoamine functionalized magnetic polymer microsphere adsorbent and method for preparing and treating uranium-containing wastewater

A polyamide amine and microsphere adsorption technology, which is applied in the direction of alkali metal compounds, chemical instruments and methods, alkali metal oxides/hydroxides, etc., can solve the limitations of large-scale industrial application, complex synthesis process, cumbersome separation process, etc. problems, to achieve the effect of fast adsorption speed, simple preparation method and high adsorption capacity

Inactive Publication Date: 2017-01-25
EAST CHINA UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Although PAMAM has shown very good application prospects in the separation and enrichment of uranium, its complex synthesis process and cumbersome separation process in the reaction have largely limited its application in the nuclear industry. Further large-scale industrial application of

Method used

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  • A polyamidoamine functionalized magnetic polymer microsphere adsorbent and method for preparing and treating uranium-containing wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Mix 4.0g of glycidyl methacrylate, 2g of ethylene glycol dimethacrylate, 0.3g of acrylic acid and 50g of deionized water into the reaction flask; stir and heat to 50°C, pour into the reaction flask Add 50g Fe 3 o 4 Ferrofluid (Fe 3 o 4 The mass fraction of magnetic fluid is 5.0%), when the temperature rises to 70.0°C, add 20g of potassium peroxodisulfate aqueous solution (the mass fraction of potassium peroxodisulfate aqueous solution is 0.5%), when the temperature rises to 80°C, keep stirring 8h, after magnetic separation, freeze-dry for 12-24h to obtain epoxy-based magnetic polymer microspheres Fe 3 o 4 / P(GMA-AA-EGDMA).

Embodiment 2

[0043] (1) Take 0.5g Fe 3 o 4 / P(GMA-AA-EGDMA) was added to 100mL methanol, stirred at 25°C for 1h, added 7g of ethylenediamine, stirred at 80°C for 8h, magnetically separated, washed 3 times with 100mL methanol, and freeze-dried to obtain PAMAMG 0 -Fe 3 o 4 / (GMA-AA-EGDMA);

[0044] (2) Take 0.5g PAMAMG 0 -Fe 3 o 4 / (GMA-AA-EGDMA) was added to 100mL of methanol, after stirring at 25°C for 1h, 7g of methyl acrylate was added, stirred at 80°C for 8h, magnetically separated, and the product was washed 3 times with 100mL of methanol to obtain PAMAMG 0.5 -Fe 3 o 4 / (GMA-AA-EGDMA);

[0045] (3) Take 0.5g PAMAMG 0.5 -Fe 3 o 4 / (GMA-AA-EGDMA), added to 100mL of methanol, stirred at 25°C for 1h, added 7g of ethylenediamine, stirred at 80°C for 8h, magnetically separated, washed with 100mL of methanol for 3 times, and freeze-dried to obtain PAMAMG 1 -Fe 3 o 4 / (GMA-AA-EGDMA);

[0046] (4) Take 0.5g PAMAMG 1 -Fe 3 o 4 / (GMA-AA-EGDMA) was added to 100mL methanol, sti...

Embodiment 3

[0052] Accurately pipette 25mL, 50mg / L uranium standard solution and 150mL Erlenmeyer flask, use 1mol / L HCl solution, 1mol / L NaOH solution and 5mol / L NaOH solution to adjust the pH value of the solution to 5.0, add 0.0025 g of polyamidoamine-functionalized magnetic polymer microsphere adsorbent was adsorbed on a constant temperature oscillator at 25°C and 98r / min for 3h. Magnetic separation, supernatant was taken, and the concentration of uranium ions in the solution was measured by Arsenazo III spectrophotometry, and the adsorption amount at this time was calculated as 471.8 mg / g combined with formula (1).

[0053] The adsorption amount of uranium ions was calculated according to the following formula:

[0054] q e = ( C 0 - C e ) m V - - - ( 1 ...

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Abstract

The invention discloses a polyamidoamine functionalized magnetic polymer microsphere adsorbent, which is characterized in that its structural formula is: PAMAMG3-Fe3O4 / (GMA-AA-EGDMA), which is prepared from the following raw materials: epoxy Based magnetic polymer microspheres Fe3O4 / P (GMA‑AA‑EGDMA), ethylenediamine, methyl acrylate. The specific steps are: (1) Preparation of magnetic polymer microspheres containing epoxy groups; (2) Synthesis of polyamidoamine functionalized magnetic polymer microsphere adsorbent; (3) Magnetic polymer microsphere adsorbent Adsorption test for uranium in uranium-containing wastewater. The preparation route of the present invention is simple and easy to operate; it has the advantages of strong adsorption capacity, large adsorption capacity and fast adsorption speed when treating uranium-containing wastewater, and is easy to separate from aqueous solution, can be reused, and can effectively absorb and recover uranium in aqueous solution ion.

Description

[0001] field of invention [0002] The invention relates to a polyamidoamine functionalized magnetic polymer microsphere 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. However, with the rapid development of the nuclear industry, more and more radioactive waste water containing uranium is produced. Due to the half-life, high radioactivity and biological toxicity of uranium, industrial wastewater containing uranium has become a long-term potential environmental hazard. In order to reduce the harm of radioactive wastewater to the environment, it is necessary to separate and enrich uranium in aqueous solution. At present, the commonly used methods include chemical precipitation, solvent extraction, foam flotation, liquid film enrichment and evaporation concentration, etc. Compared with these methods, the adsorption method has wide sou...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/26B01J20/28B01J20/30G21F9/12C08G83/00C08F220/32C08F222/14C08F220/06
Inventor 袁定重张庆华刘云海王云马建国张志宾廖世军元利刚陈翠
Owner EAST CHINA UNIV OF TECH
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