A kind of aminated magnetic chitosan adsorbent and preparation method thereof

A chitosan and adsorbent technology, applied in the field of aminated magnetic chitosan adsorbent and its preparation, can solve the problems of poor removal effect, small adsorption amount of heavy metal ions, and increased purification effect of metal ions, etc., to achieve increased removal effect , Large metal ion adsorption capacity, easy separation effect

Active Publication Date: 2021-12-10
SICHUAN COLLEGE OF ARCHITECTURAL TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the defects that the chitosan magnetic adsorbent prepared by the prior art has a small adsorption capacity and poor removal effect on heavy metal ions, and provide a kind of aminated magnetic chitosan adsorbent and preparation method thereof; The agent is obtained by ammonizing the magnetic material first, and then compounding with chitosan, so that the amino group in the adsorbent has higher activity and larger content, and the adsorption capacity of metal ions is larger, and it is easier to separate from the solvent. The purification effect of metal ions in the solution is significantly increased, which is conducive to the large-scale application of chitosan magnetic adsorbent in water purification

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  • A kind of aminated magnetic chitosan adsorbent and preparation method thereof
  • A kind of aminated magnetic chitosan adsorbent and preparation method thereof

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Embodiment 1

[0029] (1) Preparation of ammonium magnetic material: Dissolve ferric chloride hexahydrate, sodium hydroxide and anhydrous sodium acetate in 1L of ethylene glycol, add hexamethylenediamine, and dissolve to obtain a mixed solution. In the mixed solution, The mass fraction of ferric chloride hexahydrate is 2%, the concentration of sodium hydroxide is 0.015mol / L, the mass fraction of anhydrous sodium acetate is 3%, and the mass fraction of hexamethylenediamine is 10%; Carry out the ammonization reaction for 6 hours to obtain the ammonization solution; cool the ammonization solution, and obtain the ammonization magnetic material through solid-liquid separation;

[0030] (2) Preparation of ammonized magnetic chitosan adsorbent: uniformly disperse chitosan and ammonized magnetic material in 1L aqueous solution, then add acetic acid to obtain a mixed gel solution, the mass fraction of chitosan in the gel solution is 3%, the mass fraction of ammonium magnetic material is 2%, and the v...

Embodiment 2

[0032] (1) Preparation of ammonium magnetic material: Dissolve ferric chloride hexahydrate, sodium hydroxide and anhydrous sodium acetate in 1L of ethylene glycol, add hexamethylenediamine, and dissolve to obtain a mixed solution. In the mixed solution, The mass fraction of ferric chloride hexahydrate is 1%, the concentration of sodium hydroxide is 0.01mol / L, the mass fraction of anhydrous sodium acetate is 1%, and the mass fraction of hexamethylenediamine is 3%; The ammonification reaction was carried out for 5 hours to obtain the ammonization solution; the ammonization solution was cooled, and the ammonization magnetic material was obtained through solid-liquid separation;

[0033] (2) Preparation of ammonized magnetic chitosan adsorbent: uniformly disperse chitosan and ammonized magnetic material in 1L aqueous solution, then add acetic acid to obtain a mixed gel solution, the mass fraction of chitosan in the gel solution 2%, the mass fraction of ammonium magnetic material i...

Embodiment 3

[0035](1) Preparation of ammonium magnetic material: Dissolve ferric chloride hexahydrate, sodium hydroxide and anhydrous sodium acetate in 1L of ethylene glycol, add hexamethylenediamine, and dissolve to obtain a mixed solution. In the mixed solution, The mass fraction of ferric chloride hexahydrate is 3%, the concentration of sodium hydroxide is 0.02mol / L, the mass fraction of anhydrous sodium acetate is 6%, and the mass fraction of hexamethylenediamine is 18%; The ammonification reaction was carried out under the lower temperature for 7 hours to obtain the ammonization solution; the ammonization solution was cooled, and the ammonization magnetic material was obtained through solid-liquid separation;

[0036] (2) Preparation of ammonized magnetic chitosan adsorbent: uniformly disperse chitosan and ammonized magnetic material in 1L aqueous solution, then add acetic acid to obtain a mixed gel solution, the mass fraction of chitosan in the gel solution 4%, the mass fraction of ...

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Abstract

The invention discloses an aminated magnetic chitosan adsorbent and a preparation method thereof. The preparation method comprises: (1) preparation of an ammonized magnetic material; (2) preparation of an ammonized magnetic chitosan adsorbent; The ammonium treatment of magnetic materials, and then compounded with chitosan, makes the amino group in the adsorbent more active and larger, the adsorption capacity of metal ions is larger, and it is easier to separate from the solvent. The metal ion purification effect is significantly increased, which is conducive to the large-scale application of chitosan magnetic adsorbent in water purification.

Description

technical field [0001] The invention relates to the field of water treatment, in particular to an aminated magnetic chitosan adsorbent and a preparation method thereof. Background technique [0002] Chitosan-based composite adsorbents have attracted extensive attention from researchers due to their excellent performance. Among them, chitosan-magnetic composite materials not only have the adsorption capacity of chitosan for metal ions but also have similar Fe 3 o 4 The obtained magnetic chitosan not only has the ability to adsorb metal ions, but also has a very high regeneration and recovery performance after compounding. Magnetic chitosan can separate metal ions under simple conditions, and has obvious advantages in large-scale dynamic adsorption; it is easy to separate, and after adsorption is saturated, magnetic chitosan can be quickly separated from water by external magnetic attraction, and then Perform elution and regeneration. Therefore, it has a good application pr...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): B01J20/24B01J20/28B01J20/30C02F1/28C02F101/20
CPCB01J20/24C02F1/286B01J20/28009B01J20/3085C02F2101/20
Inventor郭娜戴安全胡敏
OwnerSICHUAN COLLEGE OF ARCHITECTURAL TECH