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Cross-linked chitosan adsorbent grafted with ion imprinted glycine and preparation method thereof

A technology of cross-linked chitosan and ion imprinting, applied in chemical instruments and methods, adsorption water/sewage treatment, other chemical processes, etc., can solve the problems of limiting the application of chitosan and reducing the adsorption capacity, and achieve the solution of heavy metal ions Low adsorption capacity, easy operation, and high yield

Pending Publication Date: 2016-11-02
西安以锵电子科技有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But on the other hand, since the cross-linking reaction occurs on the active functional groups of chitosan, this reduces the adsorption capacity of chitosan microspheres to metal ions, which limits the application of chitosan.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] This embodiment provides a cross-linked chitosan adsorbent grafted with ion imprinted glycine and a preparation method thereof, the method comprising the following steps:

[0032] (1) Using chitosan as the material and liquid paraffin as the organic dispersion medium, first protect the amino group on the chitosan C2 with formaldehyde, and then use epichlorohydrin as the crosslinking agent, through the reverse phase suspension crosslinking method Obtain cross-linked chitosan;

[0033] (2) Using the cross-linked chitosan in the above (1) as a matrix and glycine as a body, grafting the cross-linked chitosan to obtain glycine-grafted cross-linked chitosan.

[0034] (3) Form a complex with the cross-linked chitosan heavy metal ion adsorbent and the metal ion, remove the metal ion and the pre-crosslinking agent used for imprinting, and obtain the chitosan adsorbent that is grafted and cross-linked with metal ion imprinted glycine;

[0035] The method further comprises the st...

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PUM

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Abstract

The invention relates to a cross-linked chitosan adsorbent grafted with ion-imprinted glycine and a preparation method thereof: using chitosan as an initial raw material, first protecting the amino groups on chitosan C2 with formaldehyde, and then using epoxy chloride Cross-linking with propane, then grafting cross-linked chitosan with glycine, the grafted cross-linked chitosan forms a complex with imprinted metal ions, and finally removes the metal ions and amino protecting agent used for imprinting to obtain ion imprinted Glycine-grafted cross-linked chitosan adsorbent. The adsorbent prepared by the method has the advantages of simple preparation method, convenient operation and high yield; the microspheres have micropores, which can be fully contacted with heavy metal ions; at the same time, it is a good solution to the problem of the existing cross-linked chitosan on the heavy metal ions. The problem of low adsorption capacity.

Description

technical field [0001] The invention relates to a preparation technology of an adsorbent, in particular to an ion-imprinted glycine-grafted cross-linked chitosan adsorbent and a preparation method thereof. Background technique [0002] Chitosan (chitosan) is obtained by deacetylation of chitin, and its chemical name is polyglucosamine (1-4)-2-amino-B-D glucose. It was first applied to wastewater treatment in Japan in 1977. In recent years, the application of chitosan and its derivatives in water treatment has attracted more and more attention. Its main function in water treatment is flocculation. At the same time, chitosan and its derivatives are very good green heavy metal ions. Chelating adsorbent can treat industrial wastewater and electroplating wastewater. The adsorption method is widely used in the treatment of sewage containing heavy metal ions. The main adsorbent types include: various inorganic adsorbents such as molecular sieves and clay; organic adsorbents repres...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/24B01J20/30C02F1/28C02F1/62
Inventor 李孟顺
Owner 西安以锵电子科技有限责任公司