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1,6-hexamethylenediamine modified chitosan-based magnetic adsorbent and preparation method thereof

A magnetic adsorbent, chitosan technology, applied in chemical instruments and methods, other chemical processes, alkali metal oxides/hydroxides, etc., can solve the problem of reducing the content of active adsorption functional groups of modified chitosan, affecting the Modified chitosan adsorption performance, reduced adsorption capacity and other problems, to avoid the decline of adsorption performance, good removal effect, improve the effect of amino content

Active Publication Date: 2012-10-10
HOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the interaction between the cross-linking agent and the amino groups in chitosan molecules, the existing modification methods will consume a large amount of amino groups contained in chitosan itself, reducing the content of active adsorption functional groups of chitosan after modification, which seriously affects the modification. Adsorptive performance of chitosan after deactivation reduces the adsorption capacity

Method used

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  • 1,6-hexamethylenediamine modified chitosan-based magnetic adsorbent and preparation method thereof
  • 1,6-hexamethylenediamine modified chitosan-based magnetic adsorbent and preparation method thereof
  • 1,6-hexamethylenediamine modified chitosan-based magnetic adsorbent and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0047] (1) Preparation of MCP:

[0048] Dissolution: Take 100 mL of acetic acid aqueous solution with a volume fraction of 2%, add 2.5 g of chitosan to prepare a chitosan acetic acid aqueous solution with a mass fraction of 2.5%, and leave it to stand until the chitosan is completely dissolved and becomes a yellow colloid.

[0049] Mixing: 1.25g dry powdered Fe 3 O 4 The particles were added to the dissolved chitosan solution, first stirred with a glass rod, and then sonicated in an ultrasonic cleaner for 30 minutes to form a magnetic fluid chitosan mixture.

[0050] Dispersion: Pour 125mL liquid paraffin into a three-necked flask, place the three-necked flask in a water bath, a constant temperature water bath at 25°C, start a mechanical stirring device, stir at 500r / min, and pour the prepared into the three-necked flask during the stirring process The magnetic fluid chitosan mixture was stirred for 20 minutes under these conditions.

[0051] Emulsification: Keep the water bath and st...

Embodiment 2

[0066] (1) Preparation of MCP:

[0067] Dissolution: Take 100 mL of acetic acid aqueous solution with a volume fraction of 1%, add 3 g of chitosan to prepare a chitosan acetic acid solution with a mass fraction of 3%, and leave it to stand until the chitosan is completely dissolved into a yellow colloid.

[0068] Mixing: 1.0g dry powdered Fe 3 O 4 The particles were added to the dissolved chitosan solution, first stirred with a glass rod, and then sonicated in an ultrasonic cleaner for 30 minutes to form a magnetic fluid chitosan mixture.

[0069] Dispersion: Pour 150mL liquid paraffin into a three-necked flask, place the three-necked flask in a water bath, a constant temperature water bath at 25°C, start a mechanical stirring device, stir at 600r / min, and pour the prepared into the three-necked flask during the stirring process The magnetic fluid chitosan mixture was stirred for 20 minutes under these conditions.

[0070] Emulsification: Keep the water bath and stirring conditions du...

Embodiment 3

[0084] (1) Preparation of MCP:

[0085] Dissolution: Take 100 mL of acetic acid aqueous solution with a volume fraction of 3%, add 1.0 g of chitosan to prepare a chitosan acetic acid solution with a mass fraction of 1%, and let it stand until the chitosan is completely dissolved into a yellow colloid.

[0086] Mixing: Mix 2.0g of dry powdered Fe 3 O 4 The particles were added to the dissolved chitosan solution, first stirred with a glass rod, and then sonicated in an ultrasonic cleaner for 20 minutes to form a magnetic fluid chitosan mixture.

[0087] Dispersion: Pour 100mL of liquid paraffin into a three-necked flask, place the three-necked flask in a water bath, a constant temperature water bath at 25°C, start a mechanical stirring device, stir at 700r / min, and pour the prepared into the three-necked flask during the stirring process The magnetic fluid chitosan mixture was stirred for 20 minutes under these conditions.

[0088] Emulsification: Keep the water bath and stirring condit...

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Abstract

The invention discloses a 1,6-hexamethylenediamine modified chitosan-based magnetic adsorbent and further discloses a preparation method of the adsorbent. The preparation method comprises three steps as follows: preparing a chitosan-based magnetic adsorbent, preparing an activated chitosan-based magnetic adsorbent, and preparing the 1,6-hexamethylenediamine modified chitosan-based magnetic adsorbent. The 1,6-hexamethylenediamine modified chitosan-based magnetic adsorbent provided by the invention has the advantages of high amino content, good magnetic separation property and good effect in removing organic pollutants. The preparation method is simple; the preparation process is easy to control; and the quality of the prepared 1,6-hexamethylenediamine modified chitosan-based magnetic adsorbent is stable.

Description

Technical field [0001] The invention relates to a 1,6-hexamethylenediamine modified chitosan-based magnetic adsorbent, and also relates to a preparation method thereof. Background technique [0002] Today's water pollution situation is becoming more and more serious, especially the trace organic pollutants in water sources, due to their complex composition, difficult to degrade, easy to accumulate, and toxic, which poses huge challenges to water pollution control and drinking water purification. Generally, water pollution is treated by adsorption, that is, adsorbents are added to polluted water sources to adsorb pollutants. Since the adsorption method is a physical method, secondary pollution is avoided, and it is a green water treatment method. Traditional adsorbents include activated carbon and synthetic resin. However, activated carbon has the shortcomings of non-selective adsorption, high cost of regeneration using heat and chemical methods, and synthetic resins also have th...

Claims

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Application Information

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IPC IPC(8): B01J20/24B01J20/30B01J20/28C08B37/08
Inventor 陈卫刘成刘煜
Owner HOHAI UNIV
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