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Preparation method and application of polyethersulfone membrane fixed nano-iron material

A polyethersulfone membrane and nano-iron technology, applied in the field of materials, can solve the problems of low treatment concentration, hydrophilicity, poor removal rate and separation performance, etc., and achieve the effects of high reaction efficiency, fast reaction rate and good application prospect.

Inactive Publication Date: 2021-07-16
贵州省材料技术创新基地
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, although it has good heavy metal treatment performance, its iron-loaded film materials are mostly concentrated on treating domestic sewage and improving pollution resistance, and the treatment concentration is low; and the nano-iron is not completely dispersed on the film, and the agglomeration phenomenon still exists. Lead to poor separation performance such as hydrophilicity and removal rate

Method used

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  • Preparation method and application of polyethersulfone membrane fixed nano-iron material
  • Preparation method and application of polyethersulfone membrane fixed nano-iron material

Examples

Experimental program
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Effect test

Embodiment 1

[0023] Weigh 40 g of acrylic acid (AA), 4 g of ethylene glycol, and 1 g of ammonium persulfate into a beaker, add 55 g of deionized water, stir and dissolve to prepare a 40% concentration of acrylic acid solution. The polyethersulfone membrane was put into the acrylic acid solution, shaken and reacted at room temperature for 30 min, and washed three times to obtain the AA modified polyethersulfone membrane. Weigh 1.112g FeSO again 4 ·7H 2 O placed in 40mL water to make 0.1mol / LFeSO 4 The solution was put into AA modified polyethersulfone membrane, shaken for 6 h at room temperature, washed 3 times, and Fe-loaded was prepared. 2+ Polyethersulfone membrane. The composite membrane was then transferred into 0.5% NaBH 4 In the solution, the reaction was allowed to stand at room temperature for 20 min to obtain the iron-supported polyethersulfone membrane material. After testing, the water contact angle of the material dropped to 26.87°; cut a 6*6 cm piece of the material and p...

Embodiment 2

[0026] Weigh 20 g of acrylic acid (AA), 4 g of ethylene glycol, and 1 g of ammonium persulfate into a beaker, add 75 g of deionized water, stir and dissolve to prepare a 20% concentration of acrylic acid solution. The polyethersulfone membrane was put into the acrylic acid solution, shaken and reacted at room temperature for 15 min, and washed three times to obtain the AA modified polyethersulfone membrane. Weigh 2.224g FeSO again 4 ·7H 2 O placed in 40mL water to make 0.2mol / LFeSO 4 The solution was put into AA modified polyethersulfone membrane, shaken at room temperature for 12 h, washed 3 times, and prepared Fe-loaded 2+ Polyethersulfone membrane. The composite membrane was then transferred to 1% NaBH 4 In the solution, the reaction was allowed to stand at room temperature for 30 min to obtain the iron-supported polyethersulfone membrane material. After testing, the water contact angle of the material was reduced to 34°; cut a 6*6 cm piece of the material and put it i...

Embodiment 3

[0028] Weigh 30 g of acrylic acid (AA), 4 g of ethylene glycol and 1 g of ammonium persulfate into a beaker, add 65 g of deionized water, stir and dissolve to prepare a 30% concentration of acrylic acid solution. The polyethersulfone membrane was put into the acrylic acid solution, shaken and reacted at room temperature for 30 min, and washed three times to obtain the AA modified polyethersulfone membrane. Weigh 4.448g FeSO again 4 ·7H 2 O placed in 40mL water to make 0.4mol / LFeSO 4 The solution was put into AA modified polyethersulfone membrane, shaken for 6 h at room temperature, washed 3 times, and Fe-loaded was prepared. 2+ Polyethersulfone membrane. The composite membrane was then transferred to 2% NaBH 4 In the solution, the reaction was allowed to stand at room temperature for 40 min to obtain the iron-supported polyethersulfone membrane material. After testing, the water contact angle of the material dropped to 26.7°; cut a piece of 6*6 cm of the material and put ...

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Abstract

The invention discloses a preparation method of a polyethersulfone membrane fixed nano-iron material. The preparation method comprises the following steps: step 1, preparing an acrylic acid solution with the concentration of 20-50%; step 2, immersing the polyether sulfone membrane into an acrylic acid solution for modification to obtain an AA modified polyether sulfone membrane; step 3, preparing a 0.1-0.4 mol / L FeSO4 solution, and then immersing the AA modified polyether sulfone membrane into the FeSO4 solution to obtain a Fe < 2 + > loaded polyether sulfone membrane; and step 4, transferring the Fe < 2 + > polyether sulfone membrane into a 0.5-2% NaBH4 solution, and standing and reacting at normal temperature to obtain the polyether sulfone membrane fixed nano-iron material. The removal rate of the prepared material to a Cr (VI) solution with the pH value of 2100mg / L within 30min at normal temperature can reach 95% or more, the reaction efficiency is high, the reaction rate is high, and the material has a better application prospect in the field of emergency treatment of heavy metal wastewater.

Description

technical field [0001] The invention belongs to the field of materials, and in particular relates to a preparation method and application of a polyethersulfone membrane-fixed nano-iron material. Background technique [0002] Nano-zero valent iron (NZVI) is a strong reducing agent that can quickly reduce high-valence heavy metal ions, antibiotics, etc. in water. It is a widely used water treatment agent; There is also a certain adsorption effect. At present, the United States, Europe and the United States and other countries have applied a large number of nano-zero valent iron to the water quality treatment of groundwater. In practical applications, nano-zero valent iron also has many shortcomings and concerns, mainly including: nano-zero valent iron has certain biological toxicity due to its small particle size; it is easy to agglomerate in water and is difficult to migrate, resulting in poor treatment effect; Oxidized to iron oxide; when used in large quantities, Fe formed...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/70C02F101/22
CPCC02F1/705C02F1/70C02F2101/22
Inventor 武晓邵会菊秦舒浩康冬冬韦福建李科褡任露露秦青青
Owner 贵州省材料技术创新基地