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Preparation method and application of zero-valent nano-iron supported polyacrylonitrile membrane composite material

A technology of polyacrylonitrile membrane and composite materials, applied in chemical instruments and methods, water/sludge/sewage treatment, adsorption water/sewage treatment, etc., can solve the problem of membrane structure damage, polyacrylonitrile membrane stability and strength reduction and other problems, to achieve low cost, improve recovery rate, and solve the effect of easy reunion

Active Publication Date: 2017-02-22
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this also causes damage to the membrane structure, thereby significantly reducing the stability and strength of the polyacrylonitrile membrane.

Method used

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  • Preparation method and application of zero-valent nano-iron supported polyacrylonitrile membrane composite material
  • Preparation method and application of zero-valent nano-iron supported polyacrylonitrile membrane composite material
  • Preparation method and application of zero-valent nano-iron supported polyacrylonitrile membrane composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Example 1: Preparation method of zero-valent nano-iron-based polyacrylonitrile (PAN) membrane composite material, analysis of surface chemical structure and morphological characteristics, and removal effect of malachite green dye in water. The specific content is as follows:

[0033] (1) The polyethylene glycol powder was first completely dissolved in dimethyl sulfoxide solvent at room temperature, then polyacrylonitrile and polyvinyl alcohol powder were added in sequence, and stirred in a water bath at 65°C for 26 h to obtain a homogeneous hydrophilization Polyacrylonitrile solution (the mass percent concentration of the composition in dimethyl sulfoxide is 9.6% polyacrylonitrile, 3.5% polyvinyl alcohol, and 5.0% polyethylene glycol). Cool at room temperature and let it stand for 6 hours to remove the solution bubbles, transfer the casting solution to one end of a clean glass plate, and pull the scraper to the other end of the glass plate at a uniform speed to scrape ou...

Embodiment 2

[0042] Embodiment 2: the preparation method and negative iron amount research of the composite material of loading zero-valent nano-iron-based polyacrylonitrile membrane and the removal effect of antibiotic metronidazole, the specific contents are as follows:

[0043] (1) Polyethylene glycol powder was completely dissolved in dimethyl sulfoxide solvent at room temperature, polyacrylonitrile and polyvinyl alcohol powder were added in sequence, and stirred at 50 °C for 24 h to obtain a homogeneous hydrophilized polyacrylonitrile solution (composition The mass percent concentrations of the substances in dimethyl sulfoxide were 8.0% for polyacrylonitrile, 2.1% for polyvinyl alcohol, and 3.2% for polyethylene glycol). Cool to room temperature and let it stand for 6 hours to remove the solution bubbles, transfer the casting solution to one end of a clean glass plate, pull the scraper to the other end of the glass plate at a uniform speed, and scrape out a nascent film with uniform th...

Embodiment 3

[0050] Example 3: Preparation method of zero-valent nano-iron-based polyacrylonitrile membrane composite material and its alignment with Cr 6+ The removal effect of heavy metal simulated wastewater is as follows:

[0051] (1) Dissolve polyethylene glycol powder completely in dimethyl sulfoxide solvent at room temperature, then add polyacrylonitrile and polyvinyl alcohol powder in sequence, and stir in a water bath at 60°C for 30 h to prepare homogeneous hydrophilized polypropylene Nitrile solution (the mass percent concentration of the composition in dimethyl sulfoxide is 10.0% polyacrylonitrile, 4.6% polyvinyl alcohol, and 6.5% polyethylene glycol). Cool at room temperature and let it stand for 8 hours to remove the solution bubbles, transfer the casting solution to one end of a clean glass plate, and pull the scraper to the other end of the glass plate at a uniform speed to scrape out a nascent film with uniform thickness. Stand in the air for 30 s, quickly immerse in a mix...

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PUM

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Abstract

The invention discloses a preparation method of a zero-valent nano-iron supported polyacrylonitrile membrane composite material. The preparation method comprises the steps that a polyacrylonitrile membrane composite material supported with a uniform nano-iron layer is prepared through the steps of hydrophilized membrane preparation, functional membrane modification, liquid-phase reduction method and the like. The method is simple in operation and low in cost, the iron supporting amount is remarkable increased, and dissoluble iron ion release and secondary pollution of the iron ions to the environment are greatly reduced. The prepared nanocomposite material has superior reactivity and dispersion stability, meanwhile is easy to recover and regenerate and good in recycling performance, is a novel environmentally friendly material and has very high remediation and degradation performance to simulated dye wastewater, heavy metal wastewater, antibiotics, nitrate and halogenated organic compounds, and industrial production can be achieved.

Description

technical field [0001] The invention relates to a preparation method of a zero-valent nano-iron-based polyacrylonitrile (PAN) membrane composite material and its application in the treatment of wastewater containing organic macromolecular dyes, heavy metals, antibiotics, nitrates or halogenated organic substances. Water pollution control technology field. Background technique [0002] The successful preparation of nanomaterials is an outstanding contribution of material science to mankind in the 20th century. Compared with macroscopic materials, nanomaterials have many unique physical and chemical properties such as surface effect, volume effect and quantum effect. It exhibits excellent properties in optical, electrical, magnetic, mechanical and other aspects, and has broad application prospects. Since nanoscale zero-valent iron (NZVI) was first synthesized and applied to remove organic pollutants in 1997, a large number of related researches on the removal of environmenta...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26B01J20/30C02F1/28
CPCB01J20/0229C02F1/28B01J20/26C02F1/285C02F1/281
Inventor 王向宇刘鹏
Owner KUNMING UNIV OF SCI & TECH
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