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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 above-mentioned prior art, the present invention aims to provide a kind of method for adsorbing uranyl ion

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

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

[0022] S2, add 90 mL of distilled water and 18 mL of hydroxyethyl acrylate (HEA) into the Erlenmeyer flask, stir for 0.5 h to mix HEA and distilled water evenly. Add 1.5g of pre-irradiated UHMWPE fibers to it, blow nitrogen gas for 20min to remove oxygen, and seal it. The system was reacted in a water bath at 45°C for 2h. The grafted material was taken out, washed with distilled water, and put into an oven to dry for 24 hours. The grafting rate of the UHMWPE fibers with hydroxyl groups was calculated to be 80%.

[0023] S3, taking 0.8g of UHMWPE fibers with hydroxyl groups with a grafting rate of 80% and immersing them in the grafting solution prepared in advance, and reacting in a water bath at 30° C. for 6 hours under the protection of nitrogen. A total of 80 mL of the grafting solution was composed of...

Embodiment 2

[0026] S1, polyethylene-polypropylene skin-core structure (PE / PP) fibers were pre-irradiated with a cobalt source in air at room temperature, and the pre-irradiation dose was 15 kGy.

[0027] S2, add 90mL of distilled water and 18mL of HEA into the Erlenmeyer flask, stir for 0.5h to mix the HEA and distilled water evenly. Add 1.5g of pre-irradiated PE / PP fiber to it, blow nitrogen gas for 20min to remove oxygen, and seal it. The system was reacted in a water bath at 45°C for 2h. The grafted material was taken out, washed with distilled water, and put into an oven to dry for 24 hours. The graft ratio of the PE / PP fibers with hydroxyl groups was calculated by weighing method to be 20%.

[0028] S3, take 0.8g of PE / PP fibers with hydroxyl groups with a grafting rate of 20%, and immerse them in the grafting solution prepared in advance, and react in a water bath at 30° C. for 6 hours under the protection of nitrogen. A total of 80 mL of the grafting solution is composed of: AN5...

Embodiment 3

[0031] S1, in air, high-density polyethylene (HDPE) fibers were pre-irradiated with electron beams at room temperature, and the pre-irradiation dose was 70kGy.

[0032]S2, add 190 mL of distilled water and 10 mL of hydroxyethyl methacrylate (HEMA) into the Erlenmeyer flask, stir for 0.5 h to mix HEMA and distilled water evenly. Add 2.0 g of pre-irradiated HDPE fiber to it, blow nitrogen gas for 10 minutes to remove oxygen, and seal it. The system was reacted in a water bath at 35°C for 3h. The grafted material was taken out, washed with distilled water, and put into an oven to dry for 24 hours. The grafting rate of HDPE fibers with hydroxyl groups was calculated by weighing method to be 45%.

[0033] S3, taking 1.0 g of HDPE fibers with a grafting rate of 45% and immersing them in the grafting solution prepared in advance, and reacting in a water bath at 75° C. for 4 hours under the protection of nitrogen. A total of 120 mL of the grafting solution is composed of: 50 vol.% ...

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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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