Preparation method of modified magnetic chitosan microsphere heavy metal ion adsorbent

A technology of chitosan microspheres and heavy metal ions, applied in the directions of alkali metal compounds, chemical instruments and methods, alkali metal oxides/hydroxides, etc., can solve the problem of high operating costs, high energy consumption, secondary environmental pollution, etc. problem, to achieve the effect of simple operation, high selective adsorption, and large adsorption capacity

Inactive Publication Date: 2013-08-28
ZHEJIANG GONGSHANG UNIVERSITY
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  • Description
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Problems solved by technology

These methods have some disadvantages, such as high operating costs, high energy consumption, and easy to cause secondary pollution to the environment, etc.

Method used

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  • Preparation method of modified magnetic chitosan microsphere heavy metal ion adsorbent
  • Preparation method of modified magnetic chitosan microsphere heavy metal ion adsorbent
  • Preparation method of modified magnetic chitosan microsphere heavy metal ion adsorbent

Examples

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Embodiment 1

[0052] Embodiment 1, a kind of preparation method of modified magnetic chitosan microsphere heavy metal ion adsorbent comprises the following steps:

[0053] One, prepare magnetic chitosan microsphere, carry out following steps successively:

[0054] ①. At room temperature, add 4% acetic acid solution to 0.6g chitosan powder to prepare about 20mL chitosan acetic acid solution with a mass fraction of 2.5%. After the chitosan is completely dissolved, add 0.15g Fe 3 o 4 Disperse the solid powder by ultrasonic oscillation (ultrasonic frequency 59kHz, oscillation amplitude 20mm) for 20min, then add a mixture of 50mL liquid paraffin and 20mL Span-80 (for example, S-20 can be used), and stir thoroughly for 10min;

[0055] ②. Heat up the product obtained in step ① to 55°C, add 3 mL of glutaraldehyde, set the stirring speed to 450 r / min, and cross-link the reaction for 3.5 hours under stirring;

[0056] ③. Add 5% (mass %) NaOH solution to the resultant in step ② to keep the solution ...

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Abstract

The invention relates to a preparation method of a modified magnetic chitosan microsphere heavy metal ion adsorbent, and in particular relates to a modified magnetic chitosan material which has good selectivity and adsorptive property for heavy metal ions in food, and can be recycled, and a preparation method of the modified magnetic chitosan material. Specifically, the invention discloses the preparation method of the modified magnetic chitosan microsphere heavy metal ion adsorbent. The method comprises the steps of preparing magnetic chitosan microspheres by taking chitosan powder as a raw material, further preparing the magnetic chitosan microspheres into hydroxypropyl chlorine magnetic chitosan microspheres, and carrying out chemical grafting on the hydroxypropyl chlorine magnetic chitosan microspheres by taking the hydroxypropyl chlorine magnetic chitosan microspheres as parents and 2-aminothiazole as ligands to obtain the modified magnetic chitosan microsphere heavy metal ion adsorbent. The modified magnetic chitosan microsphere heavy metal ion adsorbent prepared by the method has preferential adsorption for Hg2+ ions.

Description

technical field [0001] The invention relates to a preparation method of a modified magnetic chitosan microsphere heavy metal ion adsorbent, in particular to a modified magnetic chitosan material with good selectivity for heavy metal ions in food, good adsorption performance and reusability and its preparation method. Background technique [0002] With the development of modern analytical techniques and analytical instruments, the detection limit of heavy metal elements has been greatly reduced. However, during the analysis of trace and ultra-trace heavy metal elements, direct determination is very difficult due to the interference of a large number of coexisting elements. There are two main ways to solve this problem. One way is to develop the combination technology of instruments, such as ICP-MS, etc., but this method is more complicated to operate, costly and time-consuming, and it is difficult to achieve routine analysis; the other way It is separated and enriched in ad...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/24B01J20/28B01J20/30
Inventor 熊春华皮蕾蕾姚彩萍饶琛
Owner ZHEJIANG GONGSHANG UNIVERSITY
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