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Graphene capable of efficiently adsorbing organic substances and regeneration method thereof

A technology of graphene and organic matter, applied in the field of environmental science, can solve the problems of low regeneration efficiency of activated carbon, increased cost of water treatment, high energy consumption, etc., and achieve the effect of fast adsorption speed, huge specific surface area, and huge adsorption performance

Inactive Publication Date: 2014-02-12
NINGBO MORSH TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] The purpose of the present invention is to provide a water treatment with large adsorption capacity and fast adsorption speed in order to solve the defects of existing adsorption materials such as activated carbon with low regeneration efficiency, high energy consumption, and sharply increased water treatment cost. Desorption technology, so as to recycle graphene that efficiently adsorbs organic matter

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Fill the graphene powder in a Ф150mm*500mm cylindrical glass tube for filtration, use the dye to prepare a dye solution with a mass fraction of 0.3%, let the dye solution flow in from the bottom of the filter, and then flow out from the top of the filter, The filtered water samples were taken for testing, and the results are shown in Table 1. Wherein, the consumption of graphene powder is 20g / L dye solution, and the average number of layers of graphene is 5 layers, and graphene contains carboxyl functional group, and this graphene material is graphene aggregate form, and average size is 50 microns, effective average The pore size is 2 nm, and the dye is Direct Blue 2B, purchased from Shanghai Shifeng Biotechnology Co., Ltd.

Embodiment 2

[0037]Fill the graphene powder in a 200mm*200mm*200mm nylon bag, place it in a solution containing 100ppm of dye, soak for 1 hour, take the water sample after adsorption for testing; and use the graphene material in the nylon bag There is a pyrolysis thermal regeneration method for regeneration, and then the adsorption-regeneration-adsorption process is repeated 10 times. The comparison results of the dye content in the water samples after adsorption are shown in Table 2. Wherein, the consumption of graphene powder is 20g / L dye solution, and the average number of layers of graphene is 10 layers, and graphene contains hydroxyl functional group, and this graphene material is graphene aggregate form, and average size is 200 microns, effective average The pore size is 25nm, and the dye is Direct Scarlet 4BE, purchased from Jiangyin Hewang Chemical Trading Co., Ltd.

Embodiment 3

[0039] Fill the graphene powder in a 200mm*200mm*200mm nylon bag, place it in a solution containing 100ppm of dye, soak for 1 hour, take the water sample after adsorption for testing; and soak the graphene material in the nylon bag in The oxidant potassium permanganate was regenerated, and the mass ratio of potassium permanganate to graphene material was 1:1; then the process of adsorption-regeneration-adsorption was repeated for a total of 10 times, and the comparison results of dye content in water samples after adsorption were shown in table 3. Wherein, the consumption of graphene powder is 20g / L dye solution, and the average number of layers of graphene is 15 layers, and graphene contains non-carbon element sulfur and oxygen, and this graphene material is graphene aggregate form, and average size is 80 micron, the effective average pore size is 50nm, and the dye is direct scarlet 4BE, which was purchased from Jiangyin Hewang Chemical Trade Co., Ltd.

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Abstract

The invention discloses a graphene capable of efficiently adsorbing organic substances. The graphene is in a single-layer sheet structure, or the number of layers of the graphene is 2-50, wherein the intralayer is mainly in a structure that carbon atoms compose hexagonal honeycomb crystal lattices along sp2 hybridized orbits, and the interlayer is mainly in a structure that carbon atoms are combined through pi bonds. The graphene has large specific surface area and adsorbability, has a porous structure, has the advantages of high adsorption capacity, high adsorption rate, low selectivity and the like in water treatment, and can be used as an efficient adsorbing material; through a regeneration technology, efficient organic substance desorption of the graphene is realized, thereby achieving the effect of cyclic use; and after desorption, the second organic substance adsorption capacity of the graphene material is greater than the first adsorption capacity by 90%, and the number of times of cyclic adsorption / desorption is more than 10. The graphene disclosed by the invention can be used in the fields of water purification and water treatment.

Description

technical field [0001] The invention relates to the field of environmental science and technology, in particular to graphene which has large adsorption capacity and fast adsorption speed in water treatment and can be recycled and used to efficiently adsorb organic matter through desorption technology and a regeneration method thereof. [0002] Background technique [0003] With the development of our country's economy and the progress of science and technology, a large amount of industrial wastewater and domestic sewage are continuously released into the natural environment, which leads to the increasingly serious water pollution problem in our country. How to rationally utilize water resources, reduce sewage discharge, and protect the water environment has attracted widespread attention from all parties. Sewage treatment technology has emerged as the times require. Sewage treatment can not only greatly reduce sewage discharge, protect the water environment, but also save a ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/04B01J20/20B01J20/34B82Y30/00C02F1/28C01B32/194
Inventor 唐长林王樑蔡凤新赵永胜付正伟
Owner NINGBO MORSH TECH
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