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Adsorption film based on metal organic framework material, preparation method and application

A metal-organic framework, adsorption membrane technology, applied in chemical instruments and methods, adsorption water/sewage treatment, special compound water treatment, etc. , Excellent adsorption and removal effect

Inactive Publication Date: 2019-04-12
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Aiming at the defects that the adsorption membrane in the prior art is difficult to effectively remove low-concentration small molecule organic matter, and the stability of the membrane structure decreases due to long-term use, the present invention provides an adsorption membrane based on a metal-organic framework material and the membrane’s Preparation, application method

Method used

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  • Adsorption film based on metal organic framework material, preparation method and application
  • Adsorption film based on metal organic framework material, preparation method and application
  • Adsorption film based on metal organic framework material, preparation method and application

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Embodiment 1

[0048] The preparation process of adsorption membrane in the present embodiment comprises the following steps:

[0049] 1) Add 100mg Fe 3 o 4 @MIL-53 granular material was added to ethanol, and ultrasonically mixed for 30 minutes to obtain a dispersion liquid. The Fe 3 o 4 The dosage of @MIL-53 granular material is 25wt%.

[0050] Fe in this example 3 o 4 The synthesis steps of @MIL-53 granular material are as follows:

[0051] a) Prepare solution A: ZrCl 4 and H 2 BDC was ultrasonically dissolved in DMF, and MIL-53 was added for ultrasonic dispersion;

[0052] b) Preparation of solution B: ultrasonically dissolve PVP (K30) in DMF, then add Fe 3 o 4 ultrasonic dispersion;

[0053] c) Mix solutions A and B, ultrasonically disperse, and shake in a water bath under heating conditions.

[0054] d) washing with methanol, centrifugation, and vacuum drying to obtain Fe 3 o 4 @MIL-53 granular material.

[0055] 2) Add polyvinylidene fluoride to N,N-dimethylacetamide, mi...

Embodiment 2

[0061] The preparation process of adsorption membrane in the present embodiment comprises the following steps:

[0062] 1) Add 300mg Fe 3 o 4 @UiO-66 granular material was added to acetone, and ultrasonically mixed for 30 minutes to obtain a dispersion liquid. The Fe 3 o 4 The dosage of @UiO-66 granular material is 50wt%.

[0063] 2) Add 200mg of polyvinylidene fluoride to N,N-dimethylformamide, mix well with ultrasonic for 30min and dissolve it completely, then use it as casting liquid, mix the casting liquid with the above dispersion liquid, and mix thoroughly with ultrasonic for 30min , to obtain a blend solution, the polymer content in the casting solution in this step is 20wt%; the volume ratio of the dispersion liquid and the casting solution in the blend solution is 2:1.

[0064] 3) Heating at 60°C for 24 hours, evaporating to remove the acetone, coating the obtained blend on the glass plate substrate with a micron adjustable membrane device, and removing the organi...

Embodiment 3

[0070] The preparation process of adsorption membrane in the present embodiment comprises the following steps:

[0071] 1) Add 50mg Fe 3 o 4 @UiO-66 granular material was added to methanol, and ultrasonically mixed for 30 minutes to obtain a dispersion liquid. The Fe 3 o 4 The dosage of @UiO-66 granular material is 60wt%.

[0072] 2) Add 150mg of polyacrylonitrile into N,N-dimethylformamide, mix thoroughly and evenly by ultrasonication for 30min and completely dissolve it as a casting solution, mix the casting solution with the above dispersion solution, and mix well by ultrasonication for 30min, The blend liquid is obtained, and the content of the polymer in the casting liquid in this step is 40 wt %; the volume ratio of the dispersion liquid and the casting liquid in the blend liquid is 6:1.

[0073] 3) Heating at 50° C. for 24 hours, and evaporating methanol therein. Scrape the obtained blend solution on a polytetrafluoroethylene plate with a micron-adjustable membrane...

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Abstract

The invention discloses an adsorption film based on a metal organic framework material, a preparation method and application, and belongs to the field of advanced wastewater treatment and reuse. The adsorption film is prepared by blending the modified metal organic framework material and a casting solution, wherein the modified metal organic framework material comprises an iron oxide. The invention further provides a wastewater advanced treatment method. The method comprises the following steps that a, wastewater containing pollutants passes through the adsorption film, and the pollutants areadsorbed; b, the adsorption film treated in step a is placed in a hydrogen peroxide solution for stirring, and pollutant degradation and film material regeneration are carried out, wherein the hydrogen peroxide solution is an acidic solution. According to the method, the film separation section adsorption pollutants are coupled with film cleaning section oxidation degradation pollutants so that the adsorption and degradation efficiency of the pollutants can be effectively improved, and the problem that the service life of a film material in a long-term film catalysis process is shortened can be effectively solved.

Description

technical field [0001] The invention belongs to the field of advanced treatment and reuse of wastewater, and relates to an adsorption film based on a metal-organic framework material, a preparation method and an application. Background technique [0002] The biochemical tail water discharged from municipal and industrial sewage treatment plants contains multi-component low-concentration organic pollutants, including substances such as pharmaceuticals and personal care products (PPCPs) and endocrine disruptors (EDCs). A large number of test statistics show that the concentration of these organic pollutants is usually between ng / L-μg / L, and mainly phenols and biphenyls. The low-pressure ultrafiltration membrane separation technology commonly used in municipal and industrial sewage treatment plants is difficult to achieve effective removal of such dissolved small molecular organics, and intermittent chemical cleaning is required during the membrane separation process to remove ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/22C02F1/28C02F1/72C02F101/30
CPCB01J20/06B01J20/226C02F1/285C02F1/722C02F2101/30C02F2305/026
Inventor 张炜铭尹越任逸单超吕路花铭潘丙才
Owner NANJING UNIV
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