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Preparation method of adsorption material for selectively adsorbing silver ions

An adsorption material, silver ion technology, applied in chemical instruments and methods, adsorption water/sewage treatment, other chemical processes, etc., can solve the problems of small adsorption capacity, low adsorption rate, etc., and achieve large adsorption capacity, convenient operation, process simple effect

Active Publication Date: 2019-05-07
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to overcome the shortcomings of the adsorption materials in the prior art that it is difficult to selectively adsorb silver ions from complex environments, and the adsorption capacity is small and the adsorption rate is low, and to provide a fast and efficient preparation of an adsorption material that selectively adsorbs silver ions method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] A kind of preparation method of the adsorption material of selectively adsorbing silver ions, the steps are as follows:

[0048] (1) Mix concentrated sulfuric acid and sodium nitrate and cool down to 5°C, add natural flake graphite and mix evenly, slowly add potassium permanganate and control the temperature of the mixture to ≤20°C to completely dissolve the natural flake graphite, in which concentrated sulfuric acid and The mass ratio of sodium nitrate is 84.6:1, and the mass ratio of natural flake graphite and sodium nitrate is 2:1, and the mass ratio of potassium permanganate and natural flake graphite is 3:1;

[0049] (2) Stir and heat up to 35°C for 2 hours, add deionized water with a volume ratio of 230:115 to concentrated sulfuric acid, stir and heat up to 98°C to continue the reaction for 15 minutes, add deionized water with a volume ratio of 700:115 to concentrated sulfuric acid Deionized water terminates the reaction to obtain scaly particles;

[0050] (3) Th...

Embodiment 2

[0062] A kind of preparation method of the adsorption material of selectively adsorbing silver ions, the steps are as follows:

[0063](1) Mix concentrated sulfuric acid and sodium nitrate and cool down to 5°C, add natural flake graphite and mix evenly, slowly add potassium permanganate and control the temperature of the mixture to ≤20°C to completely dissolve the natural flake graphite, in which concentrated sulfuric acid and The mass ratio of sodium nitrate is 84.6:1, and the mass ratio of natural flake graphite and sodium nitrate is 2:1, and the mass ratio of potassium permanganate and natural flake graphite is 3:1;

[0064] (2) Stir and heat up to 35°C for 2 hours, add deionized water with a volume ratio of 230:115 to concentrated sulfuric acid, stir and heat up to 98°C to continue the reaction for 15 minutes, add deionized water with a volume ratio of 700:115 to concentrated sulfuric acid Deionized water terminates the reaction to obtain scaly particles;

[0065] (3) The...

Embodiment 3

[0077] A kind of preparation method of the adsorption material of selectively adsorbing silver ions, the steps are as follows:

[0078] (1) Mix concentrated sulfuric acid and sodium nitrate and cool down to 5°C, add natural flake graphite and mix evenly, slowly add potassium permanganate and control the temperature of the mixture to ≤20°C to completely dissolve the natural flake graphite, in which concentrated sulfuric acid and The mass ratio of sodium nitrate is 84.6:1, and the mass ratio of natural flake graphite and sodium nitrate is 2:1, and the mass ratio of potassium permanganate and natural flake graphite is 3:1;

[0079] (2) Stir and heat up to 35°C for 2 hours, add deionized water with a volume ratio of 230:115 to concentrated sulfuric acid, stir and heat up to 98°C to continue the reaction for 15 minutes, add deionized water with a volume ratio of 700:115 to concentrated sulfuric acid Deionized water terminates the reaction to obtain scaly particles;

[0080] (3) Th...

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Abstract

The invention relates to a preparation method of an adsorption material for selectively adsorbing silver ions. The preparation method comprises the following steps: uniformly dispersing a chitosan-graphene oxide composite material in an acetic acid solution, adding 3-mercaptopropyltrimethoxysilane, uniformly stirring the obtained solution, adding a sodium hydroxide solution to adjust the pH value of the obtained system, adding a glutaraldehyde solution, stirring the solutions to obtain a uniformly mixed solution, standing the uniformly mixed solution at 3-4 DEG C for 20 h or more, and carrying out post-treatment to obtain the mercapto modified chitosan-graphene oxide composite material. The preparation method overcomes the shortcoming of difficulty selective adsorption of the silver ions from a complex environment of adsorption materials in the prior art. The adsorption material prepared in the invention has large adsorption capacity, can quickly selectively adsorb silver ions, and makes the silver ion adsorption balance time much shorter than the adsorption balance time in the prior art.

Description

technical field [0001] The invention belongs to the field of adsorption materials, and relates to a preparation method of an adsorption material for selectively adsorbing silver ions. Background technique [0002] Silver is an important precious metal, which is widely used in handicrafts, electronic appliances, photography, medical treatment, imaging and other industries, and a large amount of silver-containing wastewater is also generated, such as silver-containing wastewater from electroplating plants, waste photographic fixer, semiconductor production tubes, etc. Core treatment waste liquid, laboratory CODCr analysis waste liquid, etc., most of the silver-containing wastewater not only contains silver ions, but also contains other metal ions, such as Cr 6+ 、Cu 2+ 、Ni 2+ , Zn 2+ , Fe 2+ If not handled properly, it will cause great harm to the environment and human health. Currently commonly used extraction methods include precipitation method, electrolysis method, ion...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/24B01J20/30C02F1/28C02F101/20
CPCB01J20/20B01J20/22B01J20/24C02F1/28C02F1/281C02F1/286C02F2101/20
Inventor 杨明耿旭席永清张芬芬闫伟霞路平
Owner DONGHUA UNIV
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