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Method of using graphene sheet and carbon nano tube three-dimensional compound for adsorbing heavy metal in water

A technology of graphene sheets and carbon nanotubes, which is applied in the direction of adsorption of water/sewage treatment, chemical instruments and methods, water pollutants, etc., can solve the problems of limited types and quantities, and inconvenient recycling of graphene sheets, and achieve low cost, The effect of enriching surface functional groups and various types

Inactive Publication Date: 2017-01-04
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The invention patent with publication number CN101973620A proposes a method for removing heavy metal ions in water by using graphene oxide sheets. Although it can realize the adsorption and purification of some heavy metal ions, there are limited types and quantities of heavy metal ions that can be adsorbed. Disadvantages of inconvenient tablet recycling

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] (1) In a 300ml three-neck flask, add 5g of graphene oxide with functional groups and 95ml of tetrahydrofuran to make a 50g / L tetrahydrofuran solution of aminated graphene oxide. Stir continuously, and add 100ml of 10g / L of monooxide at the same time Wall carbon nanotube tetrahydrofuran solution, after the addition, continue to stir for 30 minutes, and fully mix at room temperature to form a three-dimensional complex.

[0025] (2) Add the three-dimensional complex solution obtained in the first step to 1L containing Au 3+ , Fe 3+ 、Ni 2+ 、Cu 2+ , Pb 2+ 、Cr 3+ In the sewage with each ion concentration of 10mg / L, after stirring at room temperature for 1 hour, let it stand for 30 minutes to achieve adsorption equilibrium.

[0026] (3) After the complexes were collected with a magnetic field, the treated sewage was taken to detect the content of various heavy metal ions by atomic absorption spectroscopy, and it was found that the removal rate could reach more than 99.5%....

Embodiment 2

[0028] (1) In a 300ml three-neck flask, add 5g graphene oxide and 95ml tetrahydrofuran to form a 50g / L graphene oxide tetrahydrofuran solution, stir continuously, and add 100ml 10g / L aminated single-walled carbon nanotube tetrahydrofuran at the same time After the solution was added, continue to stir for 30 minutes, and mix well at room temperature to form a three-dimensional complex.

[0029] (2) Add the three-dimensional complex solution obtained in the first step to 1L containing Au 3+ , Fe 3+ 、Ni 2+ 、Cu 2+ , Pb 2+ 、Cr 3+ In the sewage with each ion concentration of 10mg / L, after stirring at room temperature for 1 hour, let it stand for 30 minutes to achieve adsorption equilibrium.

[0030] (3) After collecting the complexes with a magnetic field, the treated sewage was taken to detect the content of various heavy metal ions by atomic absorption spectroscopy, and it was found that the removal rate could reach more than 98.5%.

[0031] Table 1 is the graphene-carbon na...

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Abstract

The invention discloses a method of using a graphene sheet and carbon nano tube three-dimensional compound for adsorbing heavy metal in water. The method includes the following steps that a, under the condition of continuous stirring, a graphene sheet and carbon nano tubes are fully mixed in organic solvent to form a graphene sheet and carbon nano tube three-dimensional compound solution; b, the graphene sheet and carbon nano tube three-dimensional compound is added into sewage containing heavy metal ions and are continuously stirred under room temperature until the formed mixed reaction system reaches an adsorption equilibrium state, and then the mixed reaction system is still standing; c, the graphene sheet and carbon nano tube three-dimensional compound is separated through an applied magnetic field to purify the sewage. Compared with the prior art, the method has the advantages of being simple, environmentally friendly, free of pollution and capable of treating multiple kinds of heavy metal ions, many kinds of heavy metal ions can be treated, and the removal rate is 98% or more; the graphene sheet and carbon nano tube three-dimensional compound can be recovered through the magnetic field and used repeatedly and is low in cost.

Description

technical field [0001] The invention relates to a method for absorbing heavy metals in water by using a three-dimensional composite of graphene sheets and carbon nanotubes, which belongs to the field of water treatment in environmental protection. Background technique [0002] With global economic development and population growth, the demand for water in human society is increasing rapidly. However, the resulting waste water cannot be recycled, causing water pollution and seriously affecting the water ecological structure. The heavy metal ions contained in the wastewater discharged from industrial production are both difficult to biodegrade and highly toxic, which has attracted great attention. [0003] Methods for removing heavy metal ions in water include ion reduction, co-precipitation, membrane filtration, ion exchange, and adsorption. Among these methods, the adsorption method is widely used because of its relatively low cost, simple operation, no secondary pollution...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/28B01J20/22B01J20/30C02F101/20
CPCB01J20/205B01J20/22C02F1/288C02F2101/20
Inventor 张一梅
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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