Composite gel ball containing graphene oxide quantum dots/magnetic chitosan oligosaccharide, and preparation method and application of composite gel ball

A composite gel, chitosan oligosaccharide technology, applied in chemical instruments and methods, alkali metal oxides/hydroxides, alkali metal compounds, etc., can solve the problem that the embedded particles are easily broken, the mass transfer resistance is large, and the activity loss is large. and other problems, to achieve the effect of good mechanical strength, large adsorption capacity and high viscosity

Active Publication Date: 2019-01-29
QUFU NORMAL UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the use of boric acid cross-linking agents in the preparation of polyvinyl alcohol gels is toxic to microbial cells, and the polyvinyl alcohol carrier is prone to adhesion during use, resulting in embedded particles that are easily broken, large mass transfer resistance, and gas production. Defects such as floating and large loss of activity
The preparation of sodium alginate immobil

Method used

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  • Composite gel ball containing graphene oxide quantum dots/magnetic chitosan oligosaccharide, and preparation method and application of composite gel ball
  • Composite gel ball containing graphene oxide quantum dots/magnetic chitosan oligosaccharide, and preparation method and application of composite gel ball
  • Composite gel ball containing graphene oxide quantum dots/magnetic chitosan oligosaccharide, and preparation method and application of composite gel ball

Examples

Experimental program
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Effect test

Embodiment 1

[0032] A composite gel ball comprising graphene oxide quantum dots / magnetic chitosan oligosaccharides is prepared by the following steps:

[0033] 1) Preparation of magnetic chitosan oligosaccharide solution: Add poly-γ glutamic acid and chitosan oligosaccharide to deionized water, heat in microwave until completely dissolved, cool to 30°C, add ferroferric oxide dispersion, stir well to prepare Magnetic chitosan oligosaccharide solution; the dosage ratio of poly-gamma glutamic acid, chitosan oligosaccharide and deionized water is 0.625g:0.2g:100mL; the dosage ratio of ferric oxide dispersion to deionized water is 0.075mL:100mL ; The concentration of ferric oxide dispersion is 30%.

[0034] 2) Preparation of composite embedding carrier aqueous solution: add polyvinyl alcohol and sodium alginate to deionized water, sterilize at high temperature and dissolve them completely, and cool to 30°C to obtain polyvinyl alcohol / sodium alginate aqueous solution; polyethylene Alcohol / sodiu...

Embodiment 2

[0040] A composite gel ball comprising graphene oxide quantum dots / magnetic chitosan oligosaccharides is prepared by the following steps:

[0041] 1) Preparation of magnetic chitosan oligosaccharide solution: Add poly-γ glutamic acid and chitosan oligosaccharide to deionized water, heat in microwave until completely dissolved, cool to 30°C, add ferroferric oxide dispersion, stir well to prepare Magnetic chitosan solution; the dosage ratio of poly-gamma glutamic acid, chitosan and deionized water is 0.55g:0.3g:100mL; the dosage ratio of ferric oxide dispersion to deionized water is 0.05mL:100mL ; The concentration of ferric oxide dispersion is 25%.

[0042]2) Preparation of composite embedding carrier aqueous solution: add polyvinyl alcohol and sodium alginate to deionized water, sterilize at high temperature and dissolve them completely, and cool to 30°C to obtain polyvinyl alcohol / sodium alginate aqueous solution; polyethylene Alcohol / sodium alginate aqueous solution and mag...

Embodiment 3

[0048] A composite gel ball comprising graphene oxide quantum dots / magnetic chitosan oligosaccharides is prepared by the following steps:

[0049] 1) Preparation of magnetic chitosan oligosaccharide solution: Add poly-γ glutamic acid and chitosan oligosaccharide to deionized water, heat in microwave until completely dissolved, cool to 30°C, add ferroferric oxide dispersion, stir well to prepare Magnetic chitosan oligosaccharide solution; the dosage ratio of poly-gamma glutamic acid, chitosan oligosaccharide and deionized water is 0.7g:0.1g:100mL; the dosage ratio of ferric oxide dispersion to deionized water is 0.1mL:100mL ; The concentration of ferric oxide dispersion is 35%.

[0050] 2) Preparation of composite embedding carrier aqueous solution: add polyvinyl alcohol and sodium alginate to deionized water, sterilize at high temperature and dissolve them completely, and cool to 30°C to obtain polyvinyl alcohol / sodium alginate aqueous solution; polyethylene Alcohol / sodium al...

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Abstract

The invention belongs to the field of sewage treatment, and particularly relates to a composite gel ball containing graphene oxide quantum dots/magnetic chitosan oligosaccharide, and a preparation method and application of the composite gel ball. The preparation method of the composite gel ball comprises the following steps: 1) adding poly-gamma glutamic acid and chitosan oligosaccharide into deionized water until the poly-gamma glutamic acid and the chitosan oligosaccharide are completely dissolved, carrying out cooling, adding a ferroferric oxide dispersion liquid, and carrying out stirringto prepare a magnetic chitosan oligosaccharide solution; 2) adding polyvinyl alcohol and sodium alginate into deionized water to completely dissolving the polyvinyl alcohol and the sodium alginate, carrying out cooling to obtain a polyvinyl alcohol/sodium alginate water solution, and uniformly mixing the polyvinyl alcohol/sodium alginate water solution with the magnetic chitosan oligosaccharide solution to obtain a composite embedded carrier water solution; and 3) uniformly mixing graphene oxide quantum dots with the composite embedded carrier water solution to obtain a mixed solution, dropwise adding the mixed solution into a calcium chloride/saturated boric acid solution until small balls are formed, carrying out fixing and cross-linking, and carrying out low-temperature preservation toobtain the composite gel ball. The composite gel ball prepared by the method is large in adsorption capacity and good in mechanical strength and is recyclable.

Description

technical field [0001] The invention belongs to the field of sewage treatment, and in particular relates to a composite gel ball containing graphene oxide quantum dots / magnetic chitosan oligosaccharides and a preparation method and application thereof. Background technique [0002] In recent years, under the double influence of natural factors and human factors, the pollution of surface water bodies in my country has become increasingly serious. Adsorption is considered a cost-effective method in sewage treatment. However, traditional adsorbents have disadvantages such as low adsorption capacity and inconvenient separation. Therefore, adsorption materials with stronger adsorption performance are needed. To be used in actual sewage treatment, sewage treatment materials should be environmentally friendly, recyclable or degradable, and recyclable. [0003] Carbon nanomaterial adsorbent has the characteristics of high specific surface area, easy acquisition, simple synthesis...

Claims

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Application Information

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IPC IPC(8): B01J20/24B01J20/28B01J20/30C12N11/10C12N11/08C12N11/04C02F1/28
CPCB01J20/20B01J20/24B01J20/28009B01J20/28021B01J20/28047C02F1/288C12N11/04C12N11/08C12N11/10
Inventor 杨革安笑迟车程川刘金锋巩志金
Owner QUFU NORMAL UNIV
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