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A kind of composite gel ball comprising graphene oxide quantum dot/magnetic chitosan oligosaccharide and its preparation method and application

A composite gel and chitosan oligosaccharide technology, applied in biochemical equipment and methods, chemical instruments and methods, alkali metal oxides/hydroxides, etc. Large loss and other problems, to achieve the effect of good mechanical strength, large adsorption capacity and high viscosity

Active Publication Date: 2021-04-30
QUFU NORMAL UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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 immobilized beads requires calcium ion cross-linking to form a gel, which can effectively embed microbial cells and has high microbial activity, but the stability of calcified sodium alginate gel is poor, and it is easy to react with multiple ions or When calcium ions diffuse and potassium and sodium ions gather in large quantities, it becomes soft, and the phenomenon of "leakage of enzyme" appears

Method used

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  • A kind of composite gel ball comprising graphene oxide quantum dot/magnetic chitosan oligosaccharide and its preparation method and application
  • A kind of composite gel ball comprising graphene oxide quantum dot/magnetic chitosan oligosaccharide and its preparation method and application
  • A kind of composite gel ball comprising graphene oxide quantum dot/magnetic chitosan oligosaccharide and its preparation method and application

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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 in particular relates to a composite gel ball containing graphene oxide quantum dots / magnetic chitosan oligosaccharides and a preparation method and application thereof. The preparation method of the composite gel ball is as follows: 1) Add poly-γ glutamic acid and chitosan oligosaccharides to deionized water until they are completely dissolved, cool, add ferroferric oxide dispersion, and stir to make magnetic chitosan oligosaccharides. Sugar solution; 2) Add polyvinyl alcohol and sodium alginate to deionized water to dissolve completely and cool to obtain polyvinyl alcohol / sodium alginate aqueous solution; mix polyvinyl alcohol / sodium alginate aqueous solution with magnetic chitosan oligosaccharide solution Mix evenly to obtain a composite embedding carrier aqueous solution; 3) Mix graphene oxide quantum dots and composite embedding carrier aqueous solution evenly, add dropwise to calcium chloride / saturated boric acid solution, until small balls are formed, fix cross-linking, and store at low temperature , to obtain composite gel balls. The composite gel ball prepared by the invention has large adsorption capacity, good mechanical strength and recyclability.

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 s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/24B01J20/28B01J20/30C12N11/10C12N11/096C12N11/04C02F1/28
CPCB01J20/20B01J20/24B01J20/28009B01J20/28021B01J20/28047C02F1/288C12N11/04C12N11/08C12N11/10
Inventor 杨文质安笑迟车程川刘金锋巩志金
Owner QUFU NORMAL UNIV