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Polyethyleneimine functionalized magnetic graphene oxide adsorbent as well as preparation method and application thereof

A polyethyleneimine, oxide stone technology, applied in chemical instruments and methods, adsorption water/sewage treatment, alkali metal oxides/hydroxides, etc., can solve the problem of low adsorption capacity of magnetic graphene oxide and difficult graphene oxide. Separation and other issues to achieve good reproducibility

Pending Publication Date: 2022-07-05
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The method uses magnetic graphene oxide as a carrier, 3-aminopropyltriethoxysilane as a grafting agent, and polyethyleneimine as a modifier to prepare a modified magnetic Graphene oxide composite adsorption material solves the problems of difficult separation of graphene oxide and low adsorption capacity of magnetic graphene oxide

Method used

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  • Polyethyleneimine functionalized magnetic graphene oxide adsorbent as well as preparation method and application thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] A preparation method of polyethyleneimine functionalized magnetic graphene oxide adsorbent, comprising the following steps:

[0037] (1) ultrasonically disperse 100 mg of graphene oxide in 50 mL of water to obtain a graphene oxide dispersion; take 1.0 g of FeCl 3 ·6H 2 O and 0.5g FeCl 2 ·4H 2 O was dissolved in 15 mL of water respectively to obtain a ferric chloride solution and a ferrous chloride solution; the three solutions were mixed to obtain a mixed solution.

[0038] (2) get 10mL ammoniacal liquor (mass fraction is 25%) and join in the mixed solution of step (1), heat and stir processing, stirring speed is 600rpm, processing temperature is 80 ℃, processing time is 50min, obtains black mixed solution.

[0039] (3) after the mixed solution obtained after the treatment in step (2) is cooled to room temperature, centrifugation (centrifugation speed is 8000rpm, centrifugation time is 5min), the obtained solid is washed three times with distilled water, and dried at...

Embodiment 2

[0050] A preparation method of polyethyleneimine functionalized magnetic graphene oxide adsorbent, comprising the following steps:

[0051] (1) 100 mg of graphene oxide was ultrasonically dispersed in 50 mL of water to obtain a graphene oxide dispersion; 1.0 g of FeCl was taken 3 ·6H 2 O and 0.5g FeCl 2 ·4H 2 O was dissolved in 15 mL of water respectively to obtain a ferric chloride solution and a ferrous chloride solution; the three solutions were mixed to obtain a mixed solution.

[0052] (2) get 10mL ammoniacal liquor (mass fraction is 25%) and join in the mixed liquid of step (1), heat and stir processing, stirring speed is 600rpm, processing temperature is 80 ℃, processing time is 50min, obtains black mixed liquid.

[0053] (3) after the mixed solution obtained after the treatment in step (2) is cooled to room temperature, centrifugal treatment (the centrifugal speed is 8000 rpm, and the centrifugal time is 5 min), the obtained solid is washed three times with distille...

Embodiment 3

[0060] A preparation method of polyethyleneimine functionalized magnetic graphene oxide adsorbent, comprising the following steps:

[0061] (1) 100 mg of graphene oxide was ultrasonically dispersed in 50 mL of water to obtain a graphene oxide dispersion; 1.0 g of FeCl was taken 3 ·6H 2 O and 0.5g FeCl 2 ·4H 2 O was dissolved in 15 mL of water respectively to obtain a ferric chloride solution and a ferrous chloride solution; the three solutions were mixed to obtain a mixed solution.

[0062] (2) get 10mL ammoniacal liquor (mass fraction is 25%) and join in the mixed liquid of step (1), heat and stir processing, stirring speed is 600rpm, processing temperature is 80 ℃, processing time is 50min, obtains black mixed liquid.

[0063] (3) after the mixed solution obtained after the treatment in step (2) is cooled to room temperature, centrifugal treatment (the centrifugal speed is 8000 rpm, and the centrifugal time is 5 min), the obtained solid is washed three times with distille...

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Abstract

The invention belongs to the technical field of heavy metal ion-containing wastewater treatment, and discloses a polyethyleneimine functionalized magnetic graphene oxide adsorbent as well as a preparation method and application thereof. The method comprises the following steps: 1) uniformly mixing graphene oxide, ferrous chloride and ferric chloride in water, adding an ammonia water solution, and reacting to obtain magnetic graphene oxide; (2) carrying out reaction on the magnetic graphene oxide and 3-aminopropyltriethoxysilane in an organic solvent, so as to obtain silanized magnetic graphene oxide; and 3) dispersing the silanized magnetic graphene oxide in water, adding polyethyleneimine and a formaldehyde solution, reacting, and carrying out subsequent treatment to obtain the polyethyleneimine functionalized magnetic graphene oxide adsorbent. The method is simple, and the prepared adsorbent has selective adsorption on Hg (II), is high in adsorption capacity, easy to separate and reusable. The adsorbent provided by the invention can effectively realize removal of heavy metal ions. The adsorbent is used for removing heavy metal ions in water.

Description

technical field [0001] The invention belongs to the technical field of heavy metal wastewater treatment, and in particular relates to a polyethyleneimine functionalized magnetic graphene oxide adsorbent and a preparation method and application thereof. Background technique [0002] In the process of rapid urbanization and industrialization, a large amount of heavy metals are discharged into the environment. Due to the high toxicity, non-degradability and easy accumulation in organisms of heavy metal ions, the increasingly serious heavy metal pollution in the global freshwater system has become a problem for human society. one of the major environmental problems faced. At present, many technologies have been developed to remove heavy metal ions from water, including ion exchange, electrochemical treatment, chemical precipitation, membrane separation, etc., but these methods have problems such as high cost, low removal efficiency and complicated operation. Therefore, it is ne...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26B01J20/28C02F1/28B01J20/30C02F101/20
CPCB01J20/20B01J20/06B01J20/28009B01J20/264C02F1/285C02F1/281C02F1/283C02F2101/20
Inventor 葛华才王德麒
Owner SOUTH CHINA UNIV OF TECH