Bismuth ferrate-carbon nano tube, preparation method thereof and method for treating organic dye wastewater by utilizing bismuth ferrate-carbon nano tube

A carbon nanotube and organic dye technology, applied in the field of wastewater treatment, can solve problems such as no water treatment technology, unsuitable for household use, secondary pollution, etc., and achieve easy large-scale production and use, reduce equipment investment, and total cost. low effect

Inactive Publication Date: 2012-06-13
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are also microwave-treated activated carbon (Jou, G. C. J., Application of activated carbon in a microwave radiation field to treat trichloroethylene. In 1998; Vol. 36, pp 1643) and silicon carbide materials (Pallavkar, S.; Kim , T.-H.; Lin, J.; Hopper, J.; Ho, T.; Jo, H.-J.; Lee, J.-H., Microwave-Assisted Noncatalytic Destruction of Volatile Organic Compounds Using Ceramic- Based Microwave Absorbin

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0035] Example 1

[0036] A method for preparing bismuth ferrite-carbon nanotubes, the steps are:

[0037] (1) Dissolve the same number of moles of iron nitrate and bismuth nitrate in pure 2-methoxyethanol so that the concentrations of iron nitrate and bismuth nitrate are both 0.3 mol / L.

[0038] (2) Add 0.1 mol / L nitric acid solution to the solution formed in step (1) while stirring. The volume of the added nitric acid solution is 0.05% of 2-methoxyethanol, and adjust the pH to 5.

[0039] (3) While stirring, add carbon nanotubes, citric acid with the same mole number as ferric nitrate, and ethylene glycol with 1 / 3 of the volume of 2-methoxyethanol as dispersant into the solution in step (2), and continue stirring for 2 Hours.

[0040] (4) Raise the temperature to 55°C and keep it at that temperature, and stir for 1 hour to form a sol.

[0041] (5) Raise the temperature to 85°C and keep it at this temperature, evaporate the solvent to form a gel, take out the gel and grind until it is...

Example Embodiment

[0049] Example 2

[0050] A method for preparing bismuth ferrite-carbon nanotubes, the steps are:

[0051] (1) Dissolve the same number of moles of iron nitrate and bismuth nitrate in pure 2-methoxyethanol so that the concentrations of iron nitrate and bismuth nitrate are both 0.5 mol / L.

[0052] (2) Add a 0.2mol / L nitric acid solution to the solution formed in step (1) while stirring. The volume of the added nitric acid solution is 0.2% of 2-methoxyethanol. Adjust the pH to 7.

[0053] (3) While stirring, add carbon nanotubes, citric acid with the same mole number of ferric nitrate and ethylene glycol 2 / 3 of the volume of 2-methoxyethanol to the solution in step (2) as a dispersant, and continue to stir for 2.5 Hours.

[0054] (4) Raise the temperature to 65°C and keep it at that temperature, and stir for 1.5 hours to form a sol.

[0055] (5) Raise the temperature to 105°C and keep it at this temperature, evaporate the solvent to form a gel, take out the gel and grind until it is powd...

Example Embodiment

[0064] Example 3

[0065] A method for preparing bismuth ferrite-carbon nanotubes, the steps are:

[0066] (1) Dissolve the same number of moles of iron nitrate and bismuth nitrate in pure 2-methoxyethanol so that the concentrations of iron nitrate and bismuth nitrate are both 0.4 mol / L.

[0067] (2) Add 0.15 mol / L nitric acid solution to the solution formed in step (1) while stirring. The volume of the added nitric acid solution is 0.15% of 2-methoxyethanol, and adjust the pH to 6.

[0068] (3) While stirring, add carbon nanotubes, citric acid with the same mole number as ferric nitrate and ethylene glycol with 1 / 2 the volume of 2-methoxyethanol as dispersant into the solution in step (2), and continue stirring for 3 Hours.

[0069] (4) Raise the temperature to 60°C and keep it at this temperature, and stir for more than one hour to form a sol.

[0070] (5) Raise the temperature to 90°C and keep it at this temperature, evaporate the solvent to form a gel, take out the gel and grind un...

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PUM

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Abstract

The invention discloses a bismuth ferrate-carbon nano tube, a preparation method thereof and a method for treating organic dye wastewater by utilizing the bismuth ferrate-carbon nano tube and belongs to the field of wastewater treatment. The preparation method of the bismuth ferrate-carbon nano tube comprises the following steps of: (1) dissolving ferric nitrate and bismuth nitrate in pure 2-methoxyethanol; (2) adding a nitric acid solution; (3) adding the carbon nano tube, citric acid and glycol; (4) rising the temperature for heating so as to form sol; (5) rising the temperature for evaporating a solvent so as to form gel; (6) calcining; and (7) rising temperature and calcining to obtain crystal. The method for treating the organic dye wastewater by utilizing the bismuth ferrate-carbon nano tube prepared by the preparation method comprises the following steps of: (A) settling the wastewater containing organic dyes and taking supernatant liquor; (B) adding the bismuth ferrate-carbon nano tube; (C) recovering the bismuth ferrate-carbon nano tube; and (D) heating the bismuth ferrate-carbon nano tube in a microwave oven, and putting the bismuth ferrate-carbon nano tube into use again. The material and the method for treating the organic dye wastewater are strong in applicability, fast and energy-saving and can be better combined with the existing process.

Description

technical field [0001] The invention belongs to the field of wastewater treatment, more specifically, it relates to a magnetic adsorbent bismuth ferrite-carbon nanotube and a preparation method thereof, and a method for quickly treating organic dye wastewater with the bismuth ferrite-carbon nanotube prepared by the method method. Background technique [0002] Water resources, together with energy resources and arable land resources, are called the three important strategic resources supporting the sustainable development of my country's economy and society. The scarcity of water resources not only comes from the scarcity and unevenness of water quantity, but also from the destruction of water quality. With the rapid development of the dye textile industry, the variety and quantity of dyes continue to increase. Synthetic dye factories and printing and dyeing factories discharge a large amount of dye wastewater every year, which has become one of the key pollution sources of ...

Claims

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Application Information

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IPC IPC(8): B01J20/20B01J20/28B01J20/30B01J20/34C02F1/28C02F103/30C02F101/30
Inventor 杨绍贵陈泓哲孙成喻恺
Owner NANJING UNIV
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