A magnetic carbon airgel for adsorbing antibiotics in wastewater and its preparation method

A carbon aerogel and antibiotic technology, which is applied in adsorption water/sewage treatment, chemical instruments and methods, and other chemical processes, etc., can solve the problems of insufficient removal rate of antibiotics, expensive raw materials, and complicated preparation process of adsorbents. Excellent adsorption effect, environmental pollution-free, high specific surface area and pore volume effect

Active Publication Date: 2021-08-27
DALIAN POLYTECHNIC UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Patent CN104525160B discloses a method for preparing a composite adsorption material for absorbing antibiotics in water. By preparing modified porous carbon microspheres and modified graphene oxide, the composite adsorption material is prepared by coating and monomer polymerization, but this The preparation process of this adsorbent is cumbersome, and the raw materials are relatively expensive, and the removal rate of antibiotics is not high enough.
Patent CN105642236 reports a graphene-carbon nanotube composite airgel material used to remove tetracycline in aqueous solution, which also has the problem of relatively expensive raw materials

Method used

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  • A magnetic carbon airgel for adsorbing antibiotics in wastewater and its preparation method
  • A magnetic carbon airgel for adsorbing antibiotics in wastewater and its preparation method
  • A magnetic carbon airgel for adsorbing antibiotics in wastewater and its preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0036] (1) Preparation of magnetic dispersion: in N 2 Under the protection of atmosphere, 2.9g ferrous chloride and 5.2g ferric chloride are added into 20mL water respectively to be mixed with ferrous chloride / ferric chloride mixed solution, then the gained ferrous chloride / ferric chloride mixed solution and 3.0 5mL of mol / L ammonia solution was added dropwise to 100mL0.25mol / L ammonium nitrate solution containing 0.36g of dispersant cetyltrimethylammonium bromide to prepare Fe 3 o 4 Precipitate of precursor; After centrifugal washing with water and ethanol, add the same amount of dispersant hexadecyltrimethylammonium bromide and 100mL deionized water again, after stirring evenly, Fe 3 o 4 magnetic particle dispersion.

[0037] (2) Preparation of magnetic carbon airgel: take 1ml magnetic Fe 3 o 4 The dispersion liquid and 19ml of water are ultrasonically mixed as a solvent, add 5.5g of resorcinol, 10ml of formaldehyde, and 0.0106g of anhydrous sodium carbonate as a cataly...

Embodiment 2

[0039] (1) Preparation of magnetic dispersion: in N 2 Under the protection of the atmosphere, 2.9g ferrous chloride and 5.2g ferric chloride were added to 20mL water to prepare ferrous chloride / ferric chloride mixed solution, then ferrous chloride / ferric chloride mixed solution and 3.5mol / L ammonia solution 5mL is added dropwise in the 100mL 0.25mol / L ammonium nitrate solution that contains dispersant polyethylene glycol 2000 1.0g, prepares Fe 3 o 4 Precipitate of precursor; after centrifugal washing with water and ethanol, add the same equal amount of dispersant polyethylene glycol 2000 and 100mL deionized water again, and obtain Fe after stirring evenly 3 o 4 magnetic particle dispersion.

[0040] (2) Preparation of magnetic carbon airgel: take 2ml magnetic Fe 3 o 4 The dispersion and 18ml of water are ultrasonically mixed as a solvent, add 5.5g of resorcinol, 10ml of formaldehyde, and 0.0106g of anhydrous sodium carbonate as a catalyst; after blending the reactants ev...

Embodiment 3

[0042] (1) Preparation of magnetic dispersion: in N 2 Under the protection of the atmosphere, 2.9g ferrous chloride and 5.2g ferric chloride were added to 20mL water to prepare a ferrous chloride / ferric chloride mixed solution, and then the ferrous chloride / ferric chloride mixed solution and 4.0mol / L ammonia solution 5mL is added dropwise in the 100mL 0.35mol / L ammonium nitrate solution containing the dispersant polyethylene glycol 2000 2.0g, prepares Fe 3 o 4 Precipitate of precursor; after centrifugal washing with water and ethanol, add the same amount of dispersant polyethylene glycol 2000 and 100mL deionized water again, and magnetically stir and ultrasonically disperse to obtain magnetic Fe 3 o 4 particle dispersion.

[0043] (2) Preparation of magnetic carbon airgel: take 3ml magnetic Fe 3 o 4 The dispersion and 17ml of water were ultrasonically mixed as a solvent, 5.5g of resorcinol, 10ml of formaldehyde, and 0.0106g of anhydrous sodium carbonate were added as a c...

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Abstract

The invention relates to a magnetic carbon airgel for adsorbing antibiotics in waste water and a preparation method thereof, belonging to the technical field of environmental materials. A magnetic carbon aerogel for adsorbing antibiotics in wastewater, the magnetic carbon aerogel is composed of carbon aerogel and magnetic Fe evenly distributed in the pores of the carbon aerogel 3 o 4 Particle composition. The invention synthesizes a magnetic carbon airgel with magnetic response by adding an appropriate amount of magnetic nano particle dispersion liquid to the reaction precursor of the carbon airgel. Through the action of dispersant, the magnetic Fe 3 o 4 The particles are evenly distributed in the carbon airgel structural network, which greatly solves the problem of uneven dispersion of magnetic particles in the precursor solution, and the introduction of magnetic particles does not affect the high adsorption capacity of carbon airgel.

Description

technical field [0001] The invention relates to a magnetic carbon airgel for adsorbing antibiotics in waste water and a preparation method thereof, belonging to the technical field of environmental materials. Background technique [0002] Since the 1970s, bacterial resistance caused by the widespread use of antibiotics and abuse has become the focus of threats to human health. Numerous studies have shown that sewage treatment plants do not completely remove antibiotics. At present, a variety of antibiotics have been detected in river water, sediment and sewage treatment plants in my country. In addition, due to the limitations of the secondary treatment process itself, the concentration of water pollutants can no longer be greatly reduced at the current level. In order to improve water quality and protect the health of the population, advanced treatment of sewage is required to further reduce these compounds and minimize their contact with the environment and humans. Adsor...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/28B01J20/26B01J20/30C02F1/28C02F1/48
CPCB01J20/262B01J20/264B01J20/28009B01J20/28047C02F1/285C02F1/48
Inventor 史非田效梅刘敬肖王永强
Owner DALIAN POLYTECHNIC UNIVERSITY
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