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A kind of graphene oxide composite membrane for selectively removing metal ions in water and preparation method and application thereof

A graphene composite, metal ion technology, applied in applications, can solve problems such as poor selectivity and less wastewater research, and achieve the effects of low cost, favorable reuse and mild conditions

Active Publication Date: 2021-02-12
大庆海德能科技开发有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, most of them are currently used for the removal of single metal ions, and there are few studies on the treatment of wastewater containing multiple metal ions, and there is a problem of poor selectivity.

Method used

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  • A kind of graphene oxide composite membrane for selectively removing metal ions in water and preparation method and application thereof
  • A kind of graphene oxide composite membrane for selectively removing metal ions in water and preparation method and application thereof
  • A kind of graphene oxide composite membrane for selectively removing metal ions in water and preparation method and application thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] The graphene oxide composite membrane used to selectively remove metal ions in water in this embodiment is mainly made of graphene oxide, ammonia carboxy complexing agent and natural organic polymer flocculant; graphene oxide, ammonia carboxy complexing agent and The mass ratio of the natural organic polymer flocculant is 1:10:2; the ammonia carboxyl complexing agent is disodium edetate, and the natural organic polymer flocculant is sodium alginate.

[0047] The preparation method of the graphene oxide composite membrane for selectively removing metal ions in water of the present embodiment comprises the following steps:

[0048] 1) Graphene oxide is added into deionized water and ultrasonically treated for 2h, uniformly dispersed to obtain a 5g / L graphene oxide dispersion; then add ammonia carboxyl complexing agent and natural organic polymer flocculant in the graphene oxide dispersion, Stir at room temperature for 12h to obtain a mixed dispersion;

[0049] 2) Rinse t...

Embodiment 2

[0052] The graphene oxide composite membrane used to selectively remove metal ions in water in this embodiment is mainly made of graphene oxide, ammonia carboxy complexing agent and natural organic polymer flocculant; graphene oxide, ammonia carboxy complexing agent and The mass ratio of the natural organic polymer flocculant is 1:5:5; the ammonia carboxyl complexing agent is disodium edetate, and the natural organic polymer flocculant is sodium alginate.

[0053] The preparation method of the graphene oxide composite membrane for selectively removing metal ions in water of the present embodiment comprises the following steps:

[0054] 1) adding graphene oxide into deionized water and ultrasonically treating it for 2 hours, and dispersing evenly to obtain a graphene oxide dispersion of 1 g / L; then adding an ammonia carboxyl complexing agent and a natural organic polymer flocculant to the graphene oxide dispersion, Stir at room temperature for 12h to obtain a mixed dispersion; ...

Embodiment 3

[0057] The graphene oxide composite membrane used to selectively remove metal ions in water in this embodiment is mainly made of graphene oxide, ammonia carboxy complexing agent and natural organic polymer flocculant; graphene oxide, ammonia carboxy complexing agent and The mass ratio of the natural organic polymer flocculant is 1:7.5:3; the ammonia carboxyl complexing agent is disodium edetate, and the natural organic polymer flocculant is sodium alginate.

[0058] The preparation method of the graphene oxide composite membrane used to selectively remove metal ions in water of the present embodiment comprises the following steps:

[0059] 1) Add graphene oxide into deionized water for ultrasonic treatment for 2 hours, and disperse evenly to obtain a 2.5g / L graphene oxide dispersion; then add ammonia carboxyl complexing agent and natural organic polymer flocculant to the graphene oxide dispersion , stirred at room temperature for 2h to obtain a mixed dispersion;

[0060] 2) R...

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Abstract

The invention relates to a graphene oxide composite membrane for selectively removing metal ions in water, a preparation method and application thereof, and belongs to the technical field of wastewater treatment. The graphene oxide composite film of the present invention is mainly made of graphene oxide, ammonia carboxyl complexing agent and organic polymer flocculant; the mass ratio of graphene oxide and ammonia carboxy complexing agent is 1:5~10, ammonia The mass ratio of the carboxyl complexing agent to the organic polymer flocculant is 1-5:1. The graphene oxide composite membrane of the present invention enhances the selective adsorption capacity of the material and improves the retention rate of the material by adding a complexing agent and an organic polymer flocculant into the graphene oxide, and the organic polymer flocculant The addition can also enhance the stability of the material in the water environment, which is conducive to the reuse of the material.

Description

technical field [0001] The invention relates to a graphene oxide composite membrane for selectively removing metal ions in water, a preparation method and application thereof, and belongs to the technical field of wastewater treatment. Background technique [0002] According to the 2016 China Environmental Status Bulletin, among the 1940 evaluation, assessment and ranking sections (points) of national surface water, 2.4%, 37.5% of Class I, Class II, Class III, Class IV, Class V and inferior to Class V were respectively. %, 27.9%, 16.8%, 6.9% and 8.6%. Among the 6,124 monitoring points for groundwater quality, 10.1%, 25.4%, 4.4%, 45.4% and 14.7% of the monitoring points were rated as excellent, good, relatively good, poor and extremely poor respectively. In water pollution, in addition to water eutrophication, heavy metals are also important pollution factors. Heavy metals and their compounds are one of the categories in the "China Environmental Priority Pollutants Blacklist...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/20B01J20/28B01J20/30C02F1/28C02F101/20
CPCB01J20/20B01J20/28033C02F1/283C02F2101/20
Inventor 张岩田长勋杨治广李猛戴帅帅刘铭杰典平鸽陈寒玉
Owner 大庆海德能科技开发有限公司