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Preparation and application of iodine removing material

A composite membrane and polyethersulfone technology, applied in the field of water treatment, can solve problems such as difficult large-scale industrial operation, high equipment requirements, and large pressure drop, and achieve the effects of saving reagents, simple process, and convenient use

Inactive Publication Date: 2016-02-10
OCEAN UNIV OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, ion exchange resins are mostly granular and belong to fillers, so their large pressure drop requires high equipment requirements, and it is not easy for large-scale industrial operation

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] (1) Grind 201×7 type anion exchange resin into powder and pass through 200 mesh sieve

[0021] (2) Weigh polyethersulfone and N,N-dimethylacetamide to make a mixed solution, wherein the mass percentage of polyethersulfone is 15%, and the percentage of N,N-dimethylacetamide is 85%; at the same time, weigh the strongly basic anion exchange resin powder obtained in step (1) equivalent to 50% of the polyethersulfone mass, mix well, and stir vigorously at 40° C. for 12 hours to obtain a casting solution, which is left standing for defoaming.

[0022] (3) The above composite slurry was uniformly coated on a clean glass plate at room temperature, immersed in deionized water to obtain an ion exchange resin / polyethersulfone composite adsorption membrane, and stored in deionized water.

[0023] (4) cut 20cm 2 The resin / polyethersulfone composite adsorption membrane was used to test the adsorption performance of iodine. After 2 hours at 25°C, the potassium iodide solution (50mL) ...

Embodiment 2

[0025] (1) Strongly basic anion exchange resin 201 * 7 type anion exchange resins (the following examples are the same) are ground into powder, cross 200 mesh sieves;

[0026] (2) Weigh 25% of polyethersulfone and 75% of N,N-dimethylacetamide by mass percentage, and weigh the strongly basic anion exchange obtained in step (1) equivalent to 50% of polyethersulfone Mix the resin powder evenly, and stir vigorously at 50°C for 12 hours to obtain a casting solution, which is left standing for defoaming.

[0027] (3) The above composite slurry was uniformly coated on a clean glass plate at room temperature, immersed in deionized water to obtain an ion exchange resin / polyethersulfone composite adsorption membrane, and stored in deionized water.

[0028] (4) cut 20cm 2 The resin / polyethersulfone composite adsorption membrane is used to test the adsorption performance of iodine. After 2 hours of static adsorption concentration of 100mg / L potassium iodide solution (50mL) at 25°C, the i...

Embodiment 3

[0030] (1) Grind the strongly basic anion exchange resin into powder and pass through a 200-mesh sieve

[0031] (2) Weigh 25% of polyethersulfone and 75% of N,N-dimethylacetamide by mass percentage, and weigh the strongly basic anion exchange obtained in step (1) equivalent to 200% of polyethersulfone Mix the resin powder evenly, and stir vigorously at 50°C for 12 hours to obtain a casting solution, which is left standing for defoaming.

[0032] (3) The above composite slurry was uniformly coated on a clean glass plate at room temperature, immersed in deionized water to obtain an ion exchange resin / polyethersulfone composite adsorption membrane, and stored in deionized water.

[0033] (4) cut 20cm 2 The resin / polyethersulfone composite adsorption membrane is used to test the adsorption performance of iodine. After 2 hours of static adsorption concentration of 100mg / L potassium iodide solution (50mL) at 25°C, the iodine removal rate is measured to reach 96%. The composite adso...

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PUM

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Abstract

The invention aims at providing a preparation method and application of a novel iodine removing composite film. Aiming at solving an actual operation problem of ion exchange resin adsorption in industrial actual application, the invention provides the preparation method of an iodine adsorbing material; and the material can be used for directing adsorbing iodine ions from water. By controlling the content ratio of ion exchange resin and polyether sulfone, the adsorption capability and intensity of the material are adjusted; and when the iodine adsorbing material is applied to high-iodine water treatment, the removing rate of iodine is up to be more than 90% after 2 hours.

Description

technical field [0001] The invention relates to the field of water treatment, in particular to a preparation method of an iodine removal material and its application in iodine ion removal. Background technique [0002] Iodine is an essential trace element for animals. Animals need iodine for survival, but excessive iodine content can also cause harm. Excessive iodine content in drinking water will produce iodized disinfection by-products in the disinfection process, which have significant carcinogenicity and genotoxicity to the human body. In nuclear accidents, radioactive iodine accounts for the main part of nuclide pollution in the environment, 124 I. 125 I. 126 I. 129 I and 131 I has a long half-life, once the environment is polluted by these isotopes, its harm will be persistent. The presence of iodide in organic media can cause some problems, especially during catalytic reactions, where the presence of iodine can poison some noble metal catalysts. During the elec...

Claims

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Application Information

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IPC IPC(8): B01D71/68B01D69/12B01D67/00B01J20/26B01J20/30C02F1/28C02F1/44C02F101/12
Inventor 于凤芹王海增毛丽莉
Owner OCEAN UNIV OF CHINA
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