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Metal ion adsorption sewage separation membrane preparation method

A technology of metal ion and separation membrane, which is applied in the direction of adsorption water/sewage treatment, semi-permeable membrane separation, water/sewage treatment, etc. It can solve the problems of insufficient performance and complicated preparation process of adsorption membrane, so as to improve complexation, The effect of efficient recycling

Active Publication Date: 2018-08-17
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to overcome the problems of complex preparation process and insufficient performance of the adsorption membrane existing in the prior art, and provide a method for preparing a metal ion adsorption sewage separation membrane

Method used

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  • Metal ion adsorption sewage separation membrane preparation method
  • Metal ion adsorption sewage separation membrane preparation method
  • Metal ion adsorption sewage separation membrane preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0040] First, ultrasonically disperse 100mg of graphene oxide in 100mL of deionized water, add 2g of tannin, heat the solution to 50°C and stir for 12h. The product is filtered through a membrane with a pore size of 0.2μm, then washed, dried and ground to obtain polyphenols Modified graphene oxide (TA-GO).

[0041] 2gTA-GO was ultrasonically dispersed in 84g DMF in N 2 Slowly add 12.5g of dried and pretreated PVDF powder (average molecular weight 100,000-400,000) and 1.5g of pore-forming agent polyvinylpyrrolidone K30 to the dispersion liquid under protection, stir and react for 24 hours to make the casting liquid uniform and stable, and finally It was placed in a vacuum oven for degassing for 6 h.

[0042] Pour the prepared film casting solution on a glass plate, scrape out a flat film with uniform thickness and consistency with a scraper, and then place it in a water coagulation bath to solidify to form a film. After taking it out, wash it several times with deionized water,...

Embodiment 2

[0044] First, ultrasonically disperse 100mg of graphene oxide in 100mL of deionized water, then add 2g of dopamine, heat the solution to 50°C and stir for 12h, the product is filtered through a membrane with a pore size of 0.2μm, then washed, dried and ground for storage to obtain dopamine-modified Graphene oxide (DA-GO).

[0045] 1 g DA-GO was ultrasonically dispersed in 84 g DMF in N 2 Slowly add 13.5g of dried and pretreated PVDF powder (average molecular weight 100,000-400,000) and 1.5g of pore-forming agent polyvinylpyrrolidone K30 to the dispersion liquid under protection, stir and react for 24 hours to make the casting liquid uniform and stable, and finally It was placed in a vacuum oven for degassing for 6 h.

[0046] Pour the prepared film casting solution on a glass plate, scrape out a flat film with uniform thickness and consistency with a scraper, and then place it in a water coagulation bath to solidify to form a film. After taking it out, wash it several times ...

Embodiment 3

[0048] First, ultrasonically disperse 100 mg of graphene oxide in 100 mL of deionized water, add 2 g of pyrogallic acid, heat the solution to 50°C and stir for 12 hours, filter the product with a membrane with a pore size of 0.2 μm, then wash it, dry it and store it to obtain pyrogallate Acid-modified graphene oxide (PG-GO).

[0049] 1.5 g PG-GO was ultrasonically dispersed in 84 g DMF in N 2 Slowly add 13.5g of dried and pretreated PVDF powder (average molecular weight 100,000-400,000) and 1g of pore-forming agent polyvinylpyrrolidone K30 to the dispersion liquid under protection, and stir for 24 hours to make the casting liquid uniform and stable. It was placed in a vacuum oven for degassing for 6 hours.

[0050] Pour the prepared film casting solution on a glass plate, scrape out a flat film with uniform thickness and consistency with a scraper, and then place it in a water coagulation bath to solidify to form a film. After taking it out, wash it several times with deioni...

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Abstract

The invention relates to a metal ion adsorption sewage separation membrane preparation method. The method comprises the steps: firstly, utilizing polyphenol compound to modify oxidized graphene, thenpreparing the oxidized graphene, polyvinylidene fluoride, a pore forming agent and an organic solvent into a membrane casting solution and finally utilizing a solution phase conversion film forming method to cure the membrane casting solution into films. The oxidized graphene and the polyphenol compound utilized by the preparation method disclosed by the invention contain more hydrophilic oxygen-containing functional groups and have the characteristics of generating chelating reaction with metal ions, so that the membrane can separate sewage and adsorb metal ions at the same time. The metal ion adsorption sewage separation membrane prepared by the method can be cleaned and used again after adsorption finishes, so that secondary pollution is avoided; meanwhile, valuable metal can be recycled by the metal ion adsorption sewage separation membrane.

Description

technical field [0001] The invention relates to the technical field of membranes for water treatment, in particular to a preparation method of metal ion adsorption sewage separation membranes. Background technique [0002] At present, the main methods for the harmless treatment of wastewater containing metal ions include membrane separation, electrochemical precipitation, ion exchange, adsorption and biological treatment. Among them, membrane separation technology has many advantages compared with other technologies, such as good selectivity, material separation at the molecular level, normal temperature operation, no phase change, low energy consumption, and the cost is about 1 / 2 of that of evaporation concentration or freeze concentration. 3~1 / 8. Therefore, membrane separation technology has broad application prospects in the field of sewage treatment. [0003] Polyvinylidene fluoride (PVDF) is a microfiltration membrane or ultrafiltration membrane material with good com...

Claims

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Application Information

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IPC IPC(8): B01D71/34B01D69/02B01D67/00B01J20/20B01J20/30C02F1/28C02F1/44
CPCB01D67/0079B01D69/02B01D71/34B01D2325/12B01D2325/36B01J20/20C02F1/283C02F1/44
Inventor 吴力立孙琦岳王光耀王新李木
Owner WUHAN UNIV OF TECH
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