Method for adsorbing uranyl ions

A technology of uranyl ions and adsorption materials, which is applied in the field of polymer material modification, can solve the problem of high cost of adsorption materials, and achieve the effects of high specific surface area, good mechanical properties and high selectivity

Active Publication Date: 2018-08-17
SHANGHAI INST OF APPLIED PHYSICS - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to solve the high cost problem of the adsorption material of uranyl ion existing in the a

Method used

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  • Method for adsorbing uranyl ions
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Examples

Experimental program
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Effect test

Example Embodiment

[0020] Example 1

[0021] S1: Pre-irradiate ultra-high molecular weight polyethylene (UHMWPE) fibers with a cobalt source in the air at room temperature, with a pre-irradiation dose of 60kGy;

[0022] S2: Add 90 mL of distilled water and 18 mL of hydroxyethyl acrylate (HEA) to the Erlenmeyer flask, and stir for 0.5 h to make HEA and distilled water mix uniformly. Add 1.5 g of pre-irradiated UHMWPE fiber to it, bubbling nitrogen for 20 minutes to remove oxygen, and sealing. The system was reacted in a water bath at 45°C for 2h. Take out the grafted material, wash it with distilled water, and put it in an oven for 24h. The grafting rate of UHMWPE fiber with hydroxyl group was calculated by weighing method to 80%.

[0023] S3: Take 0.8 g of UHMWPE fiber with a hydroxyl group with a grafting rate of 80% and immerse it in a grafting solution prepared in advance, and react in a water bath at 30°C for 6 hours under nitrogen protection. The grafting solution is 80 mL in total, and the co...

Example Embodiment

[0025] Example 2

[0026] S1: Pre-irradiate polyethylene polypropylene sheath-core structure (PE / PP) fibers with a cobalt source in the air at room temperature, and the pre-irradiation dose is 15 kGy.

[0027] S2, add 90 mL of distilled water and 18 mL of HEA to the Erlenmeyer flask, and stir for 0.5 h to make the HEA and distilled water mix uniformly. Add 1.5g of pre-irradiated PE / PP fiber to it, bubbling nitrogen for 20min to remove oxygen, and sealing. The system was reacted in a water bath at 45°C for 2h. Take out the grafted material, wash it with distilled water, and put it in an oven for 24h. The grafting rate of PE / PP fibers with hydroxyl groups was calculated by the weighing method to be 20%.

[0028] S3: Take 0.8 g of the PE / PP fiber with hydroxyl group with a grafting rate of 20% and immerse it in the grafting solution prepared in advance, and react in a water bath at 30° C. for 6 hours under the protection of nitrogen. The grafting solution is 80 mL in total, and the ...

Example Embodiment

[0030] Example 3

[0031] S1: Pre-irradiate high-density polyethylene (HDPE) fibers with an electron beam in the air at room temperature, with a pre-irradiation dose of 70 kGy.

[0032] S2: Add 190 mL of distilled water and 10 mL of hydroxyethyl methacrylate (HEMA) to the Erlenmeyer flask, and stir for 0.5 h to make HEMA and distilled water mix uniformly. Add 2.0 g of pre-irradiated HDPE fiber to it, bubbling nitrogen for 10 minutes to remove oxygen, and sealing. The system was reacted in a 35°C water bath for 3 hours. Take out the grafted material, wash it with distilled water, and put it in an oven for 24h. The grafting rate of HDPE fiber with hydroxyl group is calculated by weighing method to be 45%.

[0033] S3: Take 1.0 g of HDPE fiber with hydroxyl group with a grafting rate of 45% and immerse it in a grafting solution prepared in advance, and react in a water bath at 75° C. for 4 hours under nitrogen protection. The grafting solution is 120 mL in total, and the composition...

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Abstract

The invention relates to a method for adsorbing uranyl ions. The method comprises the following steps of S1, radiating polymer fiber or a nonwoven cloth, so as to obtain the fiber or nonwoven cloth with hydroxyl; S2, inducing to graft the fiber or nonwoven cloth with hydroxyl with acrylonitrile by a chemical initiator, so as to obtain a grafting material containing acrylonitrile; S3, performing ammoximation reaction on the grafting material containing acrylonitrile, so as to obtain an amidoxime-based fiber adsorbing material; S4, mixing the amidoxime-based fiber adsorbing material and a solution containing the uranyl ions, and enabling the amidoxime-based fiber adsorbing material to adsorb the uranyl ions in the solution. The method for adsorbing the uranyl ions has the advantage that thecommercial polymer fiber or nonwoven cloth with low cost is treated by combining the radiation method and the chemical method, so as to prepare the amidoxime-based fiber or nonwoven cloth adsorbing material with low cost.

Description

technical field [0001] The invention relates to the field of polymer material modification, in particular to a method for adsorbing uranyl ions. Background technique [0002] At present, the total amount of proven uranium ore on land does not exceed 5 million tons. The shortage of uranium ore resources has caused people to turn their attention to non-traditional uranium resources, such as sea water and salt lake water. According to the International Atomic Energy Agency's estimates, the estimated amount of potentially recoverable uranium as a small by-product is about 8 million tons. The total amount is not high, and the processing is difficult and costly. It is not an ideal way to solve the shortage of uranium resources. Fortunately, there are huge uranium reserves in seawater and salt lake water, nearly a thousand times that of land uranium reserves. If uranium can be effectively extracted from seawater and salt lake water and utilized, it will be an important factor for...

Claims

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Application Information

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IPC IPC(8): B01J20/26B01J20/30C02F1/28C22B60/02G21F9/12C02F103/08
CPCB01J20/264B01J20/265C02F1/285C02F2103/08C22B60/0204G21F9/12
Inventor 马红娟徐晓李荣敖浚轩张岚李晴暖吴国忠
Owner SHANGHAI INST OF APPLIED PHYSICS - CHINESE ACAD OF SCI
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