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Iron/chitosan/polyoxyethylene composite nanofiber membrane arsenic removal material and electrostatic spinning preparation method thereof

A composite nanofiber, polyethylene oxide technology, applied in chemical instruments and methods, alkali metal compounds, water/sludge/sewage treatment, etc., to achieve the effects of strong acid and alkali resistance, low cost, and easy separation

Active Publication Date: 2014-04-09
INST OF URBAN ENVIRONMENT CHINESE ACAD OF SCI
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Problems solved by technology

[0004] Aiming at the shortcomings of existing arsenic removal adsorbents, the present invention provides an iron / chitosan / polyoxyethylene that is easy to separate, has large adsorption capacity, fast adsorption efficiency, strong selectivity, good regeneration and no environmental pollution. Preparation method of composite nanofiber membrane arsenic removal adsorbent? Firstly, a chitosan solution containing polyethylene oxide and iron ions is prepared into a nanofiber membrane with high specific surface area by high-voltage electrospinning technology

Method used

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  • Iron/chitosan/polyoxyethylene composite nanofiber membrane arsenic removal material and electrostatic spinning preparation method thereof
  • Iron/chitosan/polyoxyethylene composite nanofiber membrane arsenic removal material and electrostatic spinning preparation method thereof

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Embodiment 1

[0016] 1) Preparation of spinning solution: Dissolve 2.5 g chitosan into 50 mL acetic acid solution with a volume fraction of 50%, stir magnetically until dissolved to obtain a 5% w / v chitosan solution? 3% w / v chitosan solution obtained by the same method vPolyethylene oxide solution? Weigh 6.0g polyoxyethylene solution and add it to the chitosan solution, and stir magnetically to obtain a mixed polymer solution in which chitosan accounts for 93% of the solute.

[0017] 2) Doping: 0.24 g FeCl 3 Add to step 1) mixed polymer solution, magnetically stir until FeCl 3 dissolved to obtain an electrospinning solution in which the iron element accounts for 3% of the mass percentage of the solute.

[0018] 3) Preparation of electrospun membrane: Dissolve the electrospun membrane in step 2) into a 10 m1 syringe, set the spinning parameters: voltage 15 kV, spinneret inner diameter 0.6 mm, spinning solution flow rate 0.9 mL / h, the distance from the spinneret to the receiving drum is 15...

Embodiment 2

[0022] 1) Preparation of spinning solution: Dissolve 2.5 g chitosan into 50 mL acetic acid solution with a volume fraction of 50%, stir magnetically until dissolved to obtain a 5% w / v chitosan solution? 3% w / v chitosan solution obtained by the same method vPolyethylene oxide solution? Weigh 6.0g polyoxyethylene solution and add it to the chitosan solution, and stir magnetically to obtain a mixed polymer solution in which chitosan accounts for 93% of the solute.

[0023] 2) Doping: 0.54 g FeCl 3 Add to step 1) mixed polymer solution, magnetically stir until FeCl 3 dissolved to obtain an electrospinning solution in which the iron element accounts for 6% by mass of the solute.

[0024] 3) Preparation of electrospun membrane: Dissolve the electrospun membrane in step 2) into a 10 m1 syringe, set the spinning parameters: voltage 15 kV, spinneret inner diameter 0.6 mm, spinning solution flow rate 0.9 mL / h, the distance from the spinneret to the receiving drum is 15 cm, the rotati...

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Abstract

The invention belongs to the technical field of environmental materials, and particularly relates to an iron / chitosan / polyoxyethylene composite nanofiber membrane arsenic removal material and an electrostatic spinning preparation method thereof. By an electrostatic spinning technology, a chitosan solution containing polyoxyethylene and iron ions is prepared into a nanofiber membrane with high specific surface area, a new organic inorganic composite nanofiber membrane is obtained by alkali treatment, water washing and drying, the nanofiber membrane has the advantages of high adsorption capacity to trivalent arsenic As (III) and pentavalent arsenic As (V) in water in a large pH range, fast adsorption speed kinetics, high selectivity and the like, the arsenic removal material can be reused, and the preparation method has the advantages of being simple, low in cost, environmentally friendly and the like, and has good application prospects in the aspects of adsorption and film separation treatment of arsenic containing wastewater and drinking water.

Description

technical field [0001] The invention relates to an iron / chitosan / polyoxyethylene composite nanofiber membrane material for removing arsenic and an electrospinning preparation method thereof, belonging to the technical field of environmental materials. Background technique [0002] Asia is the area with the most serious arsenic pollution in groundwater, especially Bangladesh? India and China? "Science" magazine reported that nearly 20 million people in China live in high-risk areas where water sources are polluted by arsenic? Controlling arsenic pollution in groundwater is today's water treatment Research hotspots and difficulties. At present, the main methods for removing arsenic from groundwater include coagulation precipitation, ion exchange, co-precipitation and adsorption. The adsorption method has the advantages of low cost and high efficiency. It is an ideal method to deal with arsenic-contaminated groundwater. As a cheap adsorbent, iron oxide has obvious arsenic remo...

Claims

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Application Information

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IPC IPC(8): B01J20/26B01J20/28B01J20/30C02F1/28C02F1/58D04H1/728
Inventor 郑煜铭闵伶俐钟鹭斌
Owner INST OF URBAN ENVIRONMENT CHINESE ACAD OF SCI
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