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Nitrogen-containing porous polymer chelating resin and preparation and uranium-containing wastewater treatment method

A porous polymer, chelating resin technology, applied in chemical instruments and methods, other chemical processes, nuclear engineering, etc., can solve the complex preparation method, the uranium adsorption capacity needs to be improved, and the large-scale polymer chelating resin is limited. Industrial application and other problems, to achieve the effect of simple preparation method, fast adsorption speed and easy operation

Inactive Publication Date: 2017-06-13
EAST CHINA UNIV OF TECH
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  • Summary
  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, it must be pointed out that the following problems and deficiencies still exist when polymer chelating resin is used as an adsorption medium to treat uranium-containing wastewater: (1) The adsorption capacity for uranium still needs to be improved; (2) The preparation method is relatively complicated
These shortcomings limit the further large-scale industrial application of polymer chelating resins in the field of uranium-containing wastewater treatment to a large extent.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 2

[0036] Accurately pipette 25 mL, 100 mg / L uranium standard solution into a 150 mL Erlenmeyer flask, and adjust the pH of the solution to 4.5 with 8 mol / L nitric acid, 1 mol / L NaOH solution and 5 mol / L NaOH solution. Add 0.010 g of adsorbent 1, and adsorb on a constant temperature oscillator at 25 °C and 98 r / min for 3 h. After separation by filtration, the concentration of uranium ions in the filtrate was measured by arsenazo III spectrophotometry, and combined with formula (1), the adsorption amount at this time was calculated to be 127.5 mg / g.

[0037] The adsorption amount of uranium ions was calculated according to the following formula:

[0038] (1)

[0039] In the formula: q e —Adsorption capacity, mg / g; V—volume of uranium 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

[0041] Accurately pipette 25mL, 100 mg / L uranium standard solution into a 150 mL Erlenmeyer flask, adjust the pH of the solution to 5 with 8 mol / L nitric acid, 1 mol / L NaOH solution and 5 mol / L NaOH solution, add 0.010 g of adsorbent 2 was adsorbed on a constant temperature oscillator at 25°C and 98 r / min for 3 hours, separated by filtration, and the concentration of uranium ions in the filtrate was measured by arsenazoⅢ spectrophotometry, and the adsorption at this time was calculated by combining formula (1). The amount is 193.8 mg / g.

Embodiment 4

[0043] Accurately pipette 25 mL, 200 mg / L uranium standard solution into a 150 mL Erlenmeyer flask, adjust the pH of the solution to 4.5 with 8 mol / L nitric acid, 1 mol / L NaOH solution and 5 mol / L NaOH solution, add 0.010 g of adsorbent 3, absorb on a constant temperature oscillator at 25°C and 98r / min for 3 hours, filter and separate, measure the concentration of uranium ions in the filtrate with arsenazoⅢ spectrophotometry, and calculate the adsorption amount at this time by combining (1) It is 160.0 mg / g.

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Abstract

The invention discloses a nitrogen-containing porous polymer chelating resin and a preparation and an uranium-containing wastewater treatment method. The nitrogen-containing porous polymer chelating resin is characterized in that the nitrogen-containing porous polymer chelating resin is prepared by a solvent heat method, and a chelating group is a nitrogen-containing group; the BET (Brunauer, Emmett and Teller) specific surface area of the porous polymer chelating resin containing nitrogen group is 100 to 500m<2> / g; the BJH (Barrett, Joyner and Halenda) pore diameter is 10 to 50nm; the BJH pore volume is 0.5 to 1.5cm<3> / g. The porous polymer chelating resin containing the nitrogen group has the advantages that the preparation process is simple and rapid, and the operation is easy; the adsorbing ability on uranium ions is strong, the adsorbing amount is large, the adsorbing speed is high, and the like; the porous polymer chelating resin can be easily separated from a water solution, and can effectively adsorb and recycle uranyl ions in the water solution.

Description

technical field [0001] The invention belongs to the technical field of treating uranium-containing wastewater, and relates to the preparation of a nitrogen-containing porous polymer chelating resin and a method for treating uranium-containing wastewater. Background technique [0002] With the rapid development of my country's nuclear power technology, the hazards of uranium-containing wastewater have become increasingly prominent. Uranium-containing wastewater is a type of radioactive wastewater. If uranium accumulates in large quantities in the environment, as a heavy metal with both chemical toxicity and radiotoxicity, it will cause environmental background radiation, cause species gene distortion, and cause irresistible damage to plants, farmland and soil. The destruction of reversal poses a potential threat to human production and development. Therefore, it is necessary to strengthen the treatment of uranium-containing wastewater. [0003] At present, there are many met...

Claims

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Application Information

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IPC IPC(8): B01J20/26B01J20/30C08F222/14C08F220/32G21F9/12
CPCB01J20/261B01J2220/445B01J2220/4812C08F220/32C08F220/325C08F222/1006C08F222/102G21F9/12
Inventor 袁定重张庆华王宇婷王芬冯师玲王云刘妍
Owner EAST CHINA UNIV OF TECH
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