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Preparation method and application of porous carbon nanofiber membrane capable of quickly adsorbing heavy metal ions

A nanofiber membrane, a technology for heavy metal adsorption, applied in fiber treatment, chemical instruments and methods, adsorption water/sewage treatment, etc. Rapid adsorption, easy recovery and wide application

Inactive Publication Date: 2019-08-23
SUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, both biosorption and bioflocculation methods are easily affected by environmental factors, and microorganisms are selective in the adsorption of heavy metals, so the scope of application is limited.
And the excessive reproduction of microorganisms is also likely to cause biological pollution of water bodies

Method used

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  • Preparation method and application of porous carbon nanofiber membrane capable of quickly adsorbing heavy metal ions
  • Preparation method and application of porous carbon nanofiber membrane capable of quickly adsorbing heavy metal ions
  • Preparation method and application of porous carbon nanofiber membrane capable of quickly adsorbing heavy metal ions

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preparation example Construction

[0035] The present invention provides a kind of preparation method of the porous carbon nanofiber film that fast absorbs heavy metal ion, comprises the following steps:

[0036] Step 1: mixing polyacrylonitrile (PAN) and polymethyl methacrylate (PMMA) two polymers and dissolving them in an organic solvent, and stirring at room temperature to obtain polymer spinning emulsion A;

[0037] In the above-mentioned step one, the mass percent concentration of the mixture solution of polymer polyacrylonitrile (PAN) and polymethyl methacrylate (PMMA) is 10-20%, for example, it can be 10%, 12%, 14%, 16%, 18% polymer solution. Fibers with different shapes can be obtained by adjusting the concentration, and the fibers with different shapes have different adsorption effects on heavy metal ions.

[0038]The organic solvent is selected from any one of chlorobenzene, chloroform, methylene chloride, N,N-dimethylformamide, ethyl acetate, tetrahydrofuran, preferably N,N-dimethylformamide, polyac...

Embodiment 1

[0052] Such as figure 1 As shown, this implementation case shows a preparation method of a porous carbon nanofiber membrane that rapidly adsorbs heavy metal ions in the following steps:

[0053] (1) Use a well-sealed glass bottle to prepare a spinning solution, add PAN and PMMA to DMF at a mass ratio of 7:3, stir and dissolve in a water bath at 60°C, and prepare a polymer solution with a mass fraction of 12% for use. Stir on a multi-head magnetic stirrer for 24 hours to obtain a uniform and stable PAN / PMMA mixed emulsion A.

[0054] (2) The emulsion A was continuously ultrasonicated for 1.5 hours in an ultrasonic cleaner to make the two-phase dispersion more uniform and the sea-island structure more stable.

[0055] (3) Electrospinning: set the voltage at 10kV, the distance between the spinneret and the receiver at 15cm, the flow rate of emulsion A at 0.3ml / h, and the spinning time at 12h. Preparation of PAN / PMMA sea-island nanofiber precursor B.

[0056] (4) Pre-oxidation:...

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Abstract

The invention discloses a preparation method of a porous carbon nanofiber membrane capable of quickly adsorbing heavy metal ions. The preparation method includes following steps: (1), mixing and dissolving two high-molecule polymers including polyacrylonitrile and polymethyl methacrylate into an organic solvent, and stirring at room temperature to obtain a polymer spinning emulsion A; (2), subjecting the polymer spinning emulsion A to static spinning to obtain a carbon fiber precursor; (3), pre-oxidizing and carbonizing the carbon fiber precursor to obtain the porous carbon nanofiber membrane.Compared with fiber membranes prepared by conventional methods, the porous carbon nanofiber membrane has higher porosity and specific surface area, adsorption performance of fiber is improved, and quick and continuous adsorption can be realized. The porous carbon nanofiber membrane prepared by the method can be applied in the aspect of heavy metal ion adsorption such as adsorption of various heavy metal ions like chromium, cadmium, copper, mercury, nickel and zinc.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, and in particular relates to a preparation method and application of a porous carbon nanofiber membrane that rapidly absorbs heavy metal ions. Background technique [0002] Heavy metal wastewater (containing chromium, cadmium, copper, mercury, nickel, zinc and other heavy metal ions) produced in modern industry, including metallurgy, machinery manufacturing, chemical industry, electronics, instrumentation and other industrial production processes, is the most serious water pollution and harmful to humans. One of the largest industrial effluents. If the sludge and wastewater containing heavy metal ions are used as fertilizers and irrigated farmland, the soil will be polluted, resulting in the accumulation of heavy metal ions in the crops and aquatic organisms after entering the water body, and causing serious harm to the human body through the food chain. Therefore, heavy metal wastewate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D04H1/4382D04H1/728D06C7/04D01D1/06D01D5/00B01J20/20C02F1/28B01J20/30C02F101/20C02F101/22
CPCB01J20/205C02F1/283C02F2101/20C02F2101/22D01D1/065D01D5/003D01D5/0076D01D5/0092D04H1/4382D04H1/728D06C7/04
Inventor 魏凯姚明顾婧朱孟林何丽丽
Owner SUZHOU UNIV