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Preparation method of magnetic chitosan-sodium alginate gel balls

A technology of sodium alginate and chitosan, applied in chemical instruments and methods, alkali metal oxides/hydroxides, inorganic chemistry, etc., can solve problems such as poor stability, poor acid resistance, and easy loss of mass density, and achieve stability Good resistance, easy biodegradation, and good biocompatibility

Inactive Publication Date: 2019-06-28
NANYANG NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although chitosan has the ability to adsorb heavy metals, when used alone as an adsorbent, there are problems such as poor acid resistance, low mass density, easy loss with water, and poor stability.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A kind of preparation method of magnetic chitosan-sodium alginate gel ball, comprises the following steps:

[0022] (1) The preparation process of fly ash magnetic beads is as follows: pass fly ash through a 100-mesh sieve, and perform magnetic separation in a strong magnetic field with a magnetic field strength of 300mT to obtain various magnetic beads in fly ash, and then separate various The magnetic beads are magnetically separated in a weak magnetic field with a magnetic field strength of 50mT, and strong magnetic magnetic beads with a specific saturation magnetization > 14emu / g are screened out from various magnetic beads; fly ash magnetic beads are placed in a 3mol / L In the NaOH aqueous solution, stir at a speed of 200r / min for 0.5h, then fish out the fly ash magnetic beads and wash them with clear water 4 times to obtain modified fly ash magnetic beads. Modification, remove and passivate possible trace elements in the magnetic beads, further close the channel of...

Embodiment 2

[0030] A kind of preparation method of magnetic chitosan-sodium alginate gel ball, comprises the following steps:

[0031] (1) The preparation process of fly ash magnetic beads is as follows: pass fly ash through a 110-mesh sieve, and perform magnetic separation in a strong magnetic field with a magnetic field strength of 320mT to obtain various magnetic beads in fly ash, and then separate various The magnetic beads are magnetically separated in a weak magnetic field with a magnetic field strength of 70mT, and strong magnetic beads with a specific saturation magnetization > 14emu / g are screened out from various magnetic beads; fly ash magnetic beads are placed in a 3mol / L In the NaOH aqueous solution, stir at a speed of 200r / min for 0.8h, then fish out the fly ash magnetic beads and wash them with clear water for 4 times to obtain modified fly ash magnetic beads. Modification, remove and passivate possible trace elements in the magnetic beads, further close the channel of trac...

Embodiment 3

[0039] A kind of preparation method of magnetic chitosan-sodium alginate gel ball, comprises the following steps:

[0040] (1) The preparation process of fly ash magnetic beads is as follows: pass fly ash through a 120-mesh sieve, and perform magnetic separation in a strong magnetic field with a magnetic field strength of 350mT to obtain various magnetic beads in fly ash, and then separate various The magnetic beads are magnetically separated in a weak magnetic field with a magnetic field strength of 80mT, and strong magnetic beads with a specific saturation magnetization > 14emu / g are screened out from various magnetic beads; fly ash magnetic beads are placed in a 3mol / L In the NaOH aqueous solution, stir at a speed of 200r / min for 1h, then remove the fly ash magnetic beads and wash them with clear water 5 times to obtain modified fly ash magnetic beads. The present invention modifies the fly ash magnetic beads by alkali It can remove and passivate the possible trace elements...

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Abstract

The invention discloses a preparation method of magnetic chitosan-sodium alginate gel balls, which comprises the following steps: preparing magnetic particles I of chitosan-coated fly ash magnetic beads and magnetic particles II of chitosan-coated Fe3O4 nanoparticles; dissolving 20-30 parts by weight of the sodium alginate in 60-80 parts by weight of pure water, adding 25-30 parts by weight of a mixture of the magnetic particles I and the magnetic particles II with the mass ratio of 1: 1-3, stirring and mixing, performing ultrasonic treatment for 5-10 minutes to obtain a magnetic mixed solution; dissolving 25-35 parts by weight of CaCl2 in 60-70 parts by weight of ultrapure water, slowly and uniformly dropping the magnetic mixed solution into the CaCl2 solution into the CaCl2 solution by using a syringe needle with the specification of 1 ml; cross-linking the magnetic mixed solution in water to form composite gel balls of uniform size; after soaking for 2-4 hours in CaCl2 solution, taking the gel balls out and washing for 3 times with ultrapure water to obtain magnetic chitosan-sodium alginate gel balls; the preparation method can prepare the novel composite adsorbent with uniformparticle size distribution, good dispersibility and stability, and good effect.

Description

technical field [0001] The invention relates to the technical field of biomaterials, in particular to a preparation method of magnetic chitosan-sodium alginate gel balls. Background technique [0002] The development of industries such as electroplating industry, petroleum refining and metal smelting has led to the discharge of heavy metal wastewater into water bodies, causing serious damage to aquatic organisms and even endangering human health. Traditional treatment techniques include chemical precipitation, phytoremediation, and membrane treatment. The adsorption method has the advantages of simple and convenient operation, short process cycle, and good treatment effect, and has great potential for industrial application. The core of the adsorption method lies in the selection of adsorbents. High-quality adsorbents can reduce the initial investment and operating costs of the treatment process and improve the treatment effect. Chitosan and sodium alginate are natural hig...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/24B01J20/28B01J20/30
Inventor 田龙王丽褚学英
Owner NANYANG NORMAL UNIV
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