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

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Problems solved by technology

[0007] The purpose of the present invention is to overcome the problems of complex preparation process and insufficient performance of

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

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Example Embodiment

[0039] Example 1

[0040] First, 100 mg of graphene oxide was ultrasonically dispersed in 100 mL of deionized water, and 2 g of tannins were added. The solution was heated to 50°C and stirred for 12 hours. The product was filtered with a membrane with a pore size of 0.2 μm. After washing, it was dried and ground for storage to obtain polyphenols. Modified graphene oxide (TA-GO).

[0041] Disperse 2gTA-GO in 84g DMF ultrasonically, in N 2 Under the protection, slowly add 12.5g of the pretreated PVDF powder (average molecular weight 100,000-400,000) and 1.5g of the pore-forming agent polyvinylpyrrolidone K30 to the dispersion liquid, stirring and reacting for 24 hours to make the casting liquid uniform and stable, and finally Put it in a vacuum drying oven to degas for 6h.

[0042] Pour the obtained casting liquid onto a glass plate, scrape out a flat film with uniform thickness with a spatula, and then place it in a water coagulation bath to solidify into a film. After taking it out...

Example Embodiment

[0043] Example 2

[0044] First, 100 mg of graphene oxide was ultrasonically dispersed in 100 mL of deionized water, and then 2 g of dopamine was added. The solution was heated to 50°C and stirred for 12 hours. The product was filtered with a 0.2μm pore membrane, then washed, dried and ground for storage to obtain the dopamine modified Graphene oxide (DA-GO).

[0045] Disperse 1gDA-GO in 84g DMF ultrasonically, in N 2 Under the protection, slowly add 13.5g of the pretreated PVDF powder (average molecular weight 100,000-400,000) and 1.5g of the pore-forming agent polyvinylpyrrolidone K30 to the dispersion liquid, stirring and reacting for 24h to make the casting liquid uniform and stable, and finally Put it in a vacuum drying oven to degas for 6h.

[0046] Pour the obtained casting liquid onto a glass plate, scrape out a flat film with uniform thickness with a spatula, and then place it in a water coagulation bath to solidify into a film. After taking it out, wash it with deionized ...

Example Embodiment

[0047] Example 3

[0048] First, 100 mg of graphene oxide was ultrasonically dispersed in 100 mL of deionized water, and 2 g of pyrogallic acid was added. The solution was heated to 50°C and stirred for 12 hours. The product was filtered with a 0.2μm pore size membrane, then washed, dried and ground for storage to obtain pyrogallium Acid modified graphene oxide (PG-GO).

[0049] Disperse 1.5g PG-GO in 84g DMF ultrasonically, in N 2 Under protection, slowly add 13.5g of PVDF powder (average molecular weight 100,000 to 400,000) and 1g of pore-forming agent polyvinylpyrrolidone K30 to the dispersion liquid after drying, and stir for 24 hours to make the casting liquid uniform and stable. It is placed in a vacuum drying oven to degas for 6 hours.

[0050] Pour the obtained casting liquid onto a glass plate, scrape out a flat film with uniform thickness with a spatula, and then place it in a water coagulation bath to solidify into a film. After taking it out, wash it with deionized wate...

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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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