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Chitosan magnetic composite spherule adsorbent with core-brush structure as well as preparation method and application thereof

A chitosan and adsorbent technology, which is applied in the field of chitosan magnetic composite pellet adsorbent and its preparation, can solve the problems of inability to biodegrade the adsorbent, poor adsorption effect, secondary pollution and the like, and achieves compact structure and high cost. , the effect of easy handling and recycling

Inactive Publication Date: 2016-10-26
NANJING NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problems that the existing adsorbents are not biodegradable, easy to cause secondary pollution, high cost, difficult to separate in water, poor adsorption effect, etc., the present invention provides a chitosan magnetic composite with core-brush structure. Spherical adsorbent, preparation method and application

Method used

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  • Chitosan magnetic composite spherule adsorbent with core-brush structure as well as preparation method and application thereof
  • Chitosan magnetic composite spherule adsorbent with core-brush structure as well as preparation method and application thereof
  • Chitosan magnetic composite spherule adsorbent with core-brush structure as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Weigh chitosan (viscosity average molecular weight is 200,000), add deionized water, then directly add concentrated hydrochloric acid (chitosan is completely dissolved), then weigh FeCl 3 ·6H 2 O and FeCl 2 4H 2 O was directly added to the above solution (chitosan and FeCl 3 ·6H 2 O, FeCl 2 4H 2 O, water, and concentrated hydrochloric acid in a mass ratio of 1:2.32:0.85:60:1), dissolved, and ultrasonicated for 5 minutes to obtain a mixed solution. The mixed solution synthesized above was dripped into the sodium hydroxide-ethanol-water mixed solution at a flow rate of 1 mL / min via a peristaltic pump (the mass ratio of sodium hydroxide, ethanol, and water in the sodium hydroxide-ethanol-water mixed solution was 1 :3:6, the ratio of the quality of the above-mentioned mixed solution of synthesis to the mixed solution of sodium hydroxide-ethanol-water is 1:3; shaped pellets, and uncrosslinked chitosan magnetic composite pellets were obtained after filtration.

[0049...

Embodiment 2

[0055] Weigh chitosan (viscosity average molecular weight is 100,000), add deionized water, then directly add concentrated hydrochloric acid (chitosan is completely dissolved), then weigh FeCl 3 ·6H 2 O and FeCl 2 4H 2 O was directly added to the above solution (chitosan and FeCl 3 ·6H 2 O, FeCl 2 4H 2 O, water, and concentrated hydrochloric acid in a mass ratio of 1:3.48:1.28:50:2), dissolved, and ultrasonicated for 5 minutes to obtain a mixed solution. The mixed solution synthesized above was dripped into the sodium hydroxide-ethanol-water mixed solution at a flow rate of 1 mL / min via a peristaltic pump (the mass ratio of sodium hydroxide, ethanol, and water in the sodium hydroxide-ethanol-water mixed solution was 1 : 3:6, the ratio of the quality of the mixed solution of above-mentioned synthesis to the mixed solution of sodium hydroxide-ethanol-water is 1:5; shaped pellets, and uncrosslinked chitosan magnetic composite pellets were obtained after filtration.

[005...

Embodiment 3

[0062] Weigh chitosan (viscosity average molecular weight is 150,000), add deionized water, then directly add concentrated hydrochloric acid (chitosan is completely dissolved), then weigh FeCl 3 ·6H 2 O and FeCl 2 4H 2 O was directly added to the above solution (chitosan and FeCl 3 ·6H 2 O, FeCl 2 4H 2 O, water, concentrated hydrochloric acid in a mass ratio of 1:2.78:1.02:50:80:0.5), dissolved and ultrasonicated for 5 minutes to obtain a mixed solution. The mixed solution synthesized above was dripped into the sodium hydroxide-ethanol-water mixed solution at a flow rate of 1 mL / min via a peristaltic pump (the mass ratio of sodium hydroxide, ethanol, and water in the sodium hydroxide-ethanol-water mixed solution was 1 :3:6, the ratio of the quality of the mixed solution of above-mentioned synthesis to the mixed solution of sodium hydroxide-ethanol-water is 1:4; shaped pellets, and uncrosslinked chitosan magnetic composite pellets were obtained after filtration.

[0063...

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Abstract

The invention discloses a chitosan magnetic composite spherule adsorbent with core-brush structure as well as a preparation method and application thereof and belongs to the technical field of adsorbents. The preparation method comprises the following steps of adding a mixed liquor containing ferric ions and ferrous ions into a solution containing chitosan by use of a magnetic carrier technology, so as to obtain non-crosslinked chitosan magnetic composite spherules; then adding a glutaraldehyde solution so as to obtain crosslinked chitosan magnetic composite spherules; weighing the crosslinked chitosan magnetic composite spherule, triggering with potassium peroxodisulfate, and then adding a monomer (poly-methylacryloyl MAETAC, polyacrylic acid or polymethyl methacrylate), thereby obtaining the modified chitosan magnetic composite spherule adsorbent with the core-brush structure. According to the adsorption experiments, the synthetized modified chitosan magnetic composite spherule adsorbent with the core-brush structure has the characteristics of biodegradable property, easiness for separation from water, reusability, favorable adsorption effect on chemical diclofenac sodium and the like.

Description

technical field [0001] The invention belongs to the technical field of adsorbents, and more specifically relates to a chitosan magnetic composite bead adsorbent with a core-brush structure, a preparation method and an application. Background technique [0002] With the rapid development of industry and enterprises and the rapid increase of sewage discharge, the concentration and types of pollutants in natural water bodies are also increasing, and water environmental pollution is becoming more and more serious with the acceleration of industrialization. In recent years, the focus of scholars' research on the types of pollutants in water bodies has shifted from traditional pollutants to emerging pollutants. Drugs are one of the typical emerging pollutants. Although they often exist in low concentrations in water bodies, they have attracted widespread public attention due to their refractory degradation in the environment and strong bioaccumulation. It is of great significanc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26B01J20/28B01J20/30C02F1/28C08J3/24
CPCB01J20/06B01J20/24C02F1/281C02F1/285C02F1/286C02F1/288C08J3/24B01J20/262B01J20/28009B01J20/28016C02F2101/36B01J2220/4806B01J2220/46B01J2220/4825B01J2220/4812C08J2305/08
Inventor 杨朕张少鹏杨维本张讯通沈佳淳
Owner NANJING NORMAL UNIVERSITY
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