Preparation method of polyaniline/sepiolite nanocomposite fibers for wastewater treatment

A nanocomposite fiber and wastewater treatment technology, applied in the direction of adsorption water/sewage treatment, chemical instruments and methods, and other chemical processes, can solve the problems of polyaniline easy to agglomerate, difficult to recycle, low adsorption efficiency, etc., and achieve simple preparation process , strong adsorption capacity and controllable conditions

Inactive Publication Date: 2013-01-23
ANHUI UNIVERSITY OF TECHNOLOGY
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0006] Aiming at the problems in the prior art that polyaniline is easy to agglomerate as an adsorption material, recovery is difficult, and adsorption efficiency is low, the present invention provides a preparation method of polyaniline / sepiolite composite adsorbent; Soil-removing nanocomposite fibers for the adsorption of heavy metal ions and anionic dyes in wastewater with excellent adsorption properties

Method used

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  • Preparation method of polyaniline/sepiolite nanocomposite fibers for wastewater treatment
  • Preparation method of polyaniline/sepiolite nanocomposite fibers for wastewater treatment

Examples

Experimental program
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Effect test

Embodiment 1

[0023] First, disperse 2.5g of sepiolite in 700mL of water, add 100mL of 4 mol / L hydrochloric acid aqueous solution and 10g of aniline monomer, stir and mix for 30min, then slowly drop 0.5mol / L hydrochloric acid aqueous solution containing 24.5g of ammonium persulfate Add, polymerize at room temperature for 24 hours, collect the product, wash the product with distilled water and ethanol several times until it is colorless; dry and grind it into powder to obtain polyaniline / sepiolite nanocomposite fibers.

[0024] Take 0.1g of adsorbent, put it into 100mL methyl orange solution with an initial concentration of 100mg / L, stir and adsorb for 3h, and centrifuge to separate the adsorbent. The measured methyl orange concentration is 6.8mg / L, and the adsorption rate is 93.2%.

[0025] Take 0.1g adsorbent, put it into 100mL hexavalent chromium solution with an initial concentration of 100mg / L, adjust the pH value of the hexavalent chromium solution to 2 by sulfuric acid, stir and adsorb...

Embodiment 2

[0027] First, disperse 5g of sepiolite in 700mL of water, add 100mL of 4 mol / L hydrochloric acid aqueous solution and 10g of aniline monomer, stir and mix for 30min, then slowly add 24.5g of ammonium persulfate in 0.5mol / L hydrochloric acid aqueous solution dropwise , polymerized at room temperature for 24 hours, collected the product, and washed the product with distilled water and ethanol several times until it was colorless; dried and ground into powder to obtain polyaniline / sepiolite nanocomposite fibers.

[0028] Take 0.1 g of adsorbent and put it into 100 mL of methyl orange solution with an initial concentration of 100 mg / L. After stirring and adsorbing for 3 hours, the adsorbent is separated by centrifugation. The measured concentration of methyl orange is 6.1 mg / L, and the adsorption rate is 93.9%.

[0029] Take 0.1g adsorbent, put it into 100mL hexavalent chromium solution with an initial concentration of 100mg / L, adjust the pH value of the hexavalent chromium solutio...

Embodiment 3

[0031] First, disperse 10g of sepiolite in 700mL of water, add 100mL of 4 mol / L hydrochloric acid aqueous solution and 10g of aniline monomer, stir and mix for 30min, then slowly add 24.5g of ammonium persulfate in 0.5mol / L hydrochloric acid aqueous solution dropwise , polymerized at room temperature for 24 hours, collected the product, and washed the product with distilled water and ethanol several times until it was colorless; dried and ground into powder to obtain polyaniline / sepiolite nanocomposite fibers.

[0032] Take 0.1g of adsorbent, put it into 100mL methyl orange solution with an initial concentration of 100mg / L, stir and adsorb for 3h, and centrifuge to separate the adsorbent. The measured methyl orange concentration is 4.6mg / L, and the adsorption rate is 95.4%.

[0033] Take 0.1g adsorbent, put it into 100mL hexavalent chromium solution with an initial concentration of 100mg / L, adjust the pH value of the hexavalent chromium solution to 2 by sulfuric acid, stir and ...

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Abstract

The invention provides a preparation method of polyaniline / sepiolite nanocomposite fibers for wastewater treatment, which belongs to the technical field of preparation of polymeric nanocomposites. The preparation method comprises the following steps of: dispersing sepiolite into water to obtain sepiolite solution; adding hydrochloric acid and aniline monomer to the sepiolite solution to obtain aniline monomer solution; then slowly dropping hydrochloric acid solution in which oxidant ammonium persulfate is dissolved into the aniline monomer solution, reacting for 12 to 24 hours, and collecting reaction products; filtering, washing and drying the reaction products; and then grinding and dispersing the products to obtain the polyaniline / sepiolite nanocomposite fibers. The preparation method provided by the invention is simple in preparation technology and controllable in condition; and the prepared polyaniline / sepiolite nanocomposite fibers are low in cost, have the characteristics of high adsorption and environment friendliness, are capable of markedly improving the adsorption efficiency and the adsorption capacity of polyaniline to organic anionic dye and heavy metal ions, and are suitable for the fields of industrial wastewater treatment and the like.

Description

technical field [0001] The invention belongs to the technical field of polymer nanocomposite preparation, and in particular relates to a method for preparing polyaniline / sepiolite nanocomposite fibers used for wastewater treatment. Background technique [0002] With the development of modern industry and agriculture, a large number of toxic and harmful substances in people's production and life enter the water body, and the water environment on which human beings rely for survival and development has been seriously damaged. Due to the relative lack of water resources in our country, wastewater treatment technology plays an increasingly important role in production and life. [0003] Organic dye wastewater has the characteristics of high concentration, deep color, large fluctuations in water quality, and poor biochemical properties. It is a type of industrial wastewater that is difficult to treat. Among the organic dyes, anionic dyes include acidic, direct, reactive and othe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26B01J20/30C02F1/28
Inventor 陈均洪小琴张千峰
Owner ANHUI UNIVERSITY OF TECHNOLOGY
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