Method for removing micro-plastics in water based on graphene material

A graphene and porous graphene technology, applied in the field of environmental pollution research, can solve the problems of incomplete removal of microplastics, microplastics entering rivers and oceans, etc., and achieve the effect of enhanced alkali activation, low cost, and increased wrinkles

Active Publication Date: 2020-08-25
MARINE FISHERIES RES INST OF ZHEJIANG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, sewage treatment plants mainly target COD in water Cr 、BOD 5 , TN and TP, etc., there is no link for the treatment of microplastics, so that the removal of microplastics is not complete, resulting in the discharge of microplastics into rivers and oceans with sewage treatment plants

Method used

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  • Method for removing micro-plastics in water based on graphene material
  • Method for removing micro-plastics in water based on graphene material
  • Method for removing micro-plastics in water based on graphene material

Examples

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preparation example Construction

[0040] Provide a kind of preparation method of magnetic porous graphene, comprise the following steps:

[0041]S1. Preparation of graphene oxide: Weigh 2-4g flake graphite and 10-14g potassium permanganate respectively, mix them evenly and pour them into a 200mL reactor liner, then put the reactor liner into a stainless steel reactor jacket ;Quickly add 90-100mL of concentrated sulfuric acid to the inner tank, quickly cover the inner tank lid and rotate the lid of the stainless steel reaction kettle tightly; store the reaction kettle at a temperature of 0-4°C for 3-4h; after the reaction, Quickly put the reaction kettle into an oven at 100-105°C to heat, and perform a rapid oxidation reaction for 1.5-2 hours; after the reaction, take the reaction kettle out of the oven, cool to room temperature and open it; dilute the reactant with 300-400mL deionized water , after cooling again, add 45-55mL 30% hydrogen peroxide drop by drop, stir well until the solution is golden yellow; was...

Embodiment 1

[0059] A preparation method of magnetic porous graphene, comprising the following steps:

[0060] S1. Preparation of graphene oxide: Weigh 3g of flake graphite and 12g of potassium permanganate respectively, mix them evenly and pour them into a 200mL reactor liner, then put the reactor liner into a stainless steel reactor jacket; Quickly add 100mL of concentrated sulfuric acid to the tank, quickly cover the lid of the inner container and rotate it tightly to cover the stainless steel reactor lid; store the reactor at 4°C for 4 hours; after the reaction, quickly put the reactor into an oven at 100°C Heating, rapid oxidation reaction for 1.5h; after the reaction, take the reaction kettle out of the oven, cool to room temperature and open it; dilute the reactant with 300mL deionized water, and add 55mL of 30% hydrogen peroxide dropwise after cooling again , fully stirred until the solution was golden yellow; the obtained mixed solution was washed three times with 5% hydrochloric ...

Embodiment 2

[0066] Glycine ethyl ester hydrochloride was not added when modifying graphene oxide, and the rest were exactly the same as in Example 1.

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Abstract

The invention provides a method for removing micro-plastics in water based on a graphene material, and belongs to the technical field of environmental pollution research. The method comprises the following steps: adding a magnetic porous graphene material into a sample containing the micro-plastics, stirring and mixing for 3-6 minutes, and then attracting and removing the magnetic porous grapheneby using a magnet. The invention also provides magnetic porous graphene and a preparation method thereof. The method increases the surface hydrophobicity of the magnetic porous graphene, and can increase the electronegativity of particles; according to the method, the alkali activation effect on graphene can be enhanced, adsorption sites on non-polar organic molecules are increased, and the adsorption capacity on micro-plastics is increased so that the removal rate of the micro-plastics is increased.

Description

technical field [0001] The invention belongs to the technical field of environmental pollution research, in particular to a method for removing microplastics in water based on graphene materials. Background technique [0002] The concept of microplastics was first proposed in 2004, and plastic particles with a particle size of less than 5mm are usually called microplastics. Microplastics have a wide range of pollution and have been detected in both soil and water bodies. The small size of microplastic particles provides the possibility of biophagocytosis. It is an ideal carrier for many hydrophobic organic pollutants and heavy metals, which increases the possibility of release of plastic additives or chemical substances adsorbed on microplastics in ingested organisms. Microplastics can remain in organisms and be passed further through the food chain to higher nutritional levels, thereby affecting organisms. Microplastic pollution has become one of the global environmental ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/28B01J20/30C01B32/184C01B32/194C02F1/28C02F101/30
CPCB01J20/06B01J20/20B01J20/28009B01J2220/4806B01J2220/4812C01B2204/32C02F1/283C02F2101/30C01B32/184C01B32/194
Inventor 蒋日进章春芳刘连为肖祎
Owner MARINE FISHERIES RES INST OF ZHEJIANG
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