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Hollow fiber membrane selectively adsorbing gold ions and its preparation method and application

A fiber membrane, gold ion technology, applied in chemical instruments and methods, adsorption water/sewage treatment, membrane technology, etc., can solve the problem of not being able to selectively capture gold ions, etc., and achieve the effect of high adsorption capacity

Active Publication Date: 2019-12-17
SHENZHEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the above-mentioned deficiencies in the prior art, the purpose of the present invention is to provide a hollow fiber membrane that selectively adsorbs gold ions and its preparation method and application, thereby solving the problem that the traditional gold-containing wastewater treatment method cannot selectively capture gold ions

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] (1) Put 0.1 g of polypropylene hollow fiber membrane in a plasma cleaning machine, and wash it for 5 minutes in an air atmosphere to obtain an activated PP membrane.

[0050] (2) Put 0.1g of the activated PP film obtained in step (1) into a test tube, add 15mL of dichloromethane, add 3mL of α-bromoisobutyryl bromide and 1mL of pyridine in an ice-water bath, then seal the test tube and transfer to On a magnetic stirrer with a rotating speed of 300r / min, react at room temperature for 24 hours to obtain a brominated PP film with impurities, then take out the brominated PP film with impurities, wash it with acetone for 3 times, and then rinse it with deionized water for 3 times. After several times, it was dried in an oven to obtain a clean brominated PP film.

[0051] (3) Add 0.1g of the clean brominated PP film obtained in step (2) into a test tube filled with argon, and then add 0.03g of cuprous bromide, 0.11g of copper bromide and 0.2g of 2,2-linked Pyridine, then add ...

Embodiment 2

[0062] (1) Put 0.1 g of polypropylene hollow fiber membrane in a plasma cleaning machine, and wash it for 5 minutes in an air atmosphere to obtain an activated PP membrane.

[0063] (2) Put 0.1g of the activated PP film obtained in step (1) into a test tube, add 5mL of dichloromethane, add 1mL of α-bromoisobutyryl bromide and 0.5mL of pyridine in an ice-water bath, then seal the test tube and transfer Put it on a magnetic stirrer with a rotating speed of 400r / min, react at room temperature for 5 hours, and obtain a brominated PP film with impurities, then take out the brominated PP film with impurities, wash it with acetone for 3 times, and then rinse it with deionized water After 3 times, dry in an oven to obtain a clean brominated PP film.

[0064] (3) Add 0.1g of the clean brominated PP film obtained in step (2) into a test tube filled with argon, and then add 0.01g of cuprous bromide, 0.1g of copper bromide and 0.1g of 2,2-linked Pyridine, then add 1mL deionized water, 1m...

Embodiment 3

[0071] (1) Put 0.3g polypropylene hollow fiber membrane in a plasma cleaning machine, and wash it in air atmosphere for 8 minutes to obtain an activated PP membrane.

[0072] (2) Put 0.3g of the activated PP membrane obtained in step (1) into a test tube, add 30mL of dichloromethane, add 6mL of α-bromoisobutyryl bromide and 3mL of pyridine in an ice-water bath, then seal the test tube and transfer to On a magnetic stirrer with a rotating speed of 300r / min, react at room temperature for 30 hours to obtain a brominated PP film with impurities, then take out the brominated PP film with impurities, wash it with acetone for 3 times, and then rinse it with deionized water for 3 times. After several times, it was dried in an oven to obtain a clean brominated PP film.

[0073] (3) Add 0.3g of the clean brominated PP film obtained in step (2) into a test tube filled with argon, and then add 0.3g of cuprous bromide, 0.6g of copper bromide and 0.6g of 2,2-linked Pyridine, then add 6mL d...

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PUM

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Abstract

A preparation method for a hollow fiber membrane for selectively adsorbing gold ions, comprising: performing surface activation on a polypropylene hollow fiber membrane to obtain an activated PP membrane; carrying out bromination reaction on the activated PP membrane to obtain a brominated PP membrane; performing SI-ATRP reaction on the brominated PP membrane; and performing amination to finally obtain the hollow fiber membrane for selectively adsorbing gold ions. Further disclosed are a hollow fiber membrane for selectively adsorbing gold ions and uses thereof.

Description

technical field [0001] The invention relates to the field of precious metal recovery, in particular to a hollow fiber membrane selectively adsorbing gold ions, a preparation method and application thereof. Background technique [0002] As a precious metal element, gold has specific properties and a wide range of applications, mainly in electronic technology, communication technology, medical technology and other technical fields. At a certain concentration, the compound state of gold may cause great harm to organisms and the environment. At the same time, the amount of gold in the earth's crust is very low. Based on this situation, the treatment and recycling of gold in heavy metal wastewater has more practical significance. In the gold-containing waste liquid produced in industry, the gold content is generally low. Therefore, their recycling is technically difficult and costly, so they are often discharged directly in the early days. At present, not only because gold is...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D71/78B01J20/28B01J20/26C02F1/28C02F101/20
CPCB01J20/265B01J20/28033C02F1/285C02F2101/20
Inventor 刘长坤刘吉安
Owner SHENZHEN UNIV