A kind of preparation method of magnetic chitosan composite microsphere adsorbent

A technology of composite microspheres and chitosan, applied in chemical instruments and methods, adsorption water/sewage treatment, alkali metal compounds, etc., can solve the problems of poor mechanical properties, low density, small and wide application, etc., and achieve simple preparation process , high adsorption capacity, good thermal stability

Inactive Publication Date: 2016-01-20
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the disadvantages of chitosan, such as poor mechanical properties, low density, easy caking and gel formation, and low solubility under weak acid conditions, limit its wide application in the removal of pollutants in the environment.

Method used

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  • A kind of preparation method of magnetic chitosan composite microsphere adsorbent
  • A kind of preparation method of magnetic chitosan composite microsphere adsorbent
  • A kind of preparation method of magnetic chitosan composite microsphere adsorbent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] (1) Nano Fe 3 o 4 Synthesis;

[0025] 4.72gFeCl 3 ·6H 2 O and 1.72g FeCl 2 4H 2 O was added to 96,6 mL of distilled water, followed by N 2 Stir mechanically under protection for 5-10 minutes to obtain a stable solution, then raise the temperature to 80°C, add concentrated ammonia water drop by drop, adjust the pH of the solution to 10-11, react under vigorous stirring for 0.5-1.0h, and wash the black product with Nd - Fe-B permanent magnet separation, the product is fully washed with distilled water until neutral, vacuum dried and ground at 50-60°C to obtain nano-Fe 3 o 4 .

[0026] (2) Preparation of magnetic chitosan composite microsphere adsorbent;

[0027] 0.50g of chitosan was added to 25mL of 2% acetic acid solution to form a stable solution under mechanical stirring, and 0.1g of Fe 3 o 4 and 0.15g of kaolin were added to the above solution, and mechanically stirred for 2h; 100mL of liquid paraffin and 4mL of Span-80 were added to the above mixed soluti...

experiment example 1

[0036] Take 20ml and the initial concentration is 120mgL -1 Add the ciprofloxacin hydrochloride solution into the colorimetric tube, add 20mg magnetic chitosan composite microsphere adsorbent, put the test solution at 25 o Stand in the water bath of C for 2, 4, 6, 8, 10, 20, 30, 40, 50 and 60 min respectively. After the standing time was completed, the supernatant was separated and collected by a Nd-Fe-B permanent magnet, and the molecular concentration of unadsorbed ciprofloxacin hydrochloride was measured by an ultraviolet-visible spectrophotometer, and the adsorption capacity was calculated according to the result. Figure 5 It shows that the magnetic chitosan composite microspheres have good adsorption kinetics, and the adsorption equilibrium is basically reached within 60 minutes, and the adsorption rate is fast.

experiment example 2

[0038] Take 20ml and the initial concentration is 20, 40, 60, 80, 100, 120, 140, 160, 180mgL -1 Add the ciprofloxacin hydrochloride solution into the colorimetric tube, add 20mg magnetic chitosan composite microsphere adsorbent respectively, put the test solution in 25 o After standing in the water bath of C for 3.0 h, the supernatant was separated and collected by Nd-Fe-B permanent magnet, and the molecular concentration of unadsorbed ciprofloxacin hydrochloride was measured by a UV-visible spectrophotometer, and the adsorption capacity was calculated according to the result. Figure 6 Shown shows that the saturated adsorption capacity of the magnetic chitosan composite microsphere adsorbent is 38.61mgg -1 .

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PUM

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Abstract

The invention relates to a preparation method of a magnetic chitosan composite microsphere adsorbent, which belongs to the technical field of environmental material preparation. Using FeCl3 6H2O and FeCl2 4H2O as raw materials, nano-Fe3O4 was prepared by co-precipitation method, then using glutaraldehyde as cross-linking agent, Fe3O4, kaolin and chitosan as raw materials, the magnetic chitosan composite was synthesized by emulsification cross-linking method Microsphere adsorbent, and use it for the separation of ciprofloxacin hydrochloride in water environment. Static adsorption experiments were used to study the adsorption and kinetic properties of the prepared adsorbents. The results show that the magnetic chitosan composite microsphere adsorbent obtained by the present invention has fast adsorption kinetic properties, high adsorption capacity and fast magnetic separation efficiency.

Description

technical field [0001] The invention relates to a preparation method of a magnetic chitosan composite microsphere adsorbent, which belongs to the technical field of environmental material preparation. Background technique [0002] With the rapid development of industry and the concentration of urban population, people emit more and more pollutants in production and life, and the impact of pollutants on the human environment is becoming more and more serious. Environmental issues have become one of the major issues facing the world today. Various methods have been used to remove pollutants in the environment, such as ozonation, photo-assisted-Fenton reaction, photocatalytic degradation, and adsorption. Among these methods, adsorption is considered to be one of the most effective methods due to its simple operation, high efficiency, and economy. Chitosan is a high-performance natural polysaccharide material with a large number of hydroxyl groups and amino groups, which can r...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/26B01J20/28B01J20/30C02F1/28C02F101/38
Inventor 马威戴江栋潘建明朱文静于欣平李春香闫永胜
Owner JIANGSU UNIV
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