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Nitrogen-doped porous carbon material adsorbent for treating dye wastewater as well as preparation method and application thereof

A technology for nitrogen-doped porous carbon and dye wastewater, applied in water/sewage treatment, adsorption water/sewage treatment, water/sludge/sewage treatment, etc., to achieve simple treatment process, simple preparation process, and large adsorption capacity Effect

Pending Publication Date: 2021-10-29
NORTHWEST UNIV(CN)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the limitation of the cost of raw materials used in activated carbon synthesis, it has certain limitations in practical application (D.Pathania, S.Sharma, P.Singh, Removal of methylene blueby adsorption onto activated carbon developed from Ficus carica bast, ArabianJ .Chem.10(2017)S1445-S1451.)

Method used

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  • Nitrogen-doped porous carbon material adsorbent for treating dye wastewater as well as preparation method and application thereof
  • Nitrogen-doped porous carbon material adsorbent for treating dye wastewater as well as preparation method and application thereof
  • Nitrogen-doped porous carbon material adsorbent for treating dye wastewater as well as preparation method and application thereof

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preparation example Construction

[0026] One aspect of the embodiments of the present invention provides a method for preparing a nitrogen-doped porous carbon material adsorbent for treating dye wastewater, comprising:

[0027] uniformly mixing and grinding walnut shells and a nitrogen source to obtain a first mixture;

[0028] Carrying out carbonization treatment on the first mixture in a protective atmosphere, the temperature of the carbonization treatment is 50°C-550°C, and the time is 1-3h;

[0029] uniformly mixing and grinding the obtained carbonized product with the potassium salt to obtain a second mixture;

[0030] In a protective atmosphere, the second mixture is subjected to activation treatment, the temperature of the activation treatment is 50° C. to 800° C., and the time is 1 to 3 hours to obtain a nitrogen-doped porous carbon material adsorbent for treating dye wastewater.

[0031] Further, the particle size of the walnut shell may be between 100 and 150 mesh.

[0032] Further, the nitrogen so...

Embodiment 1

[0062] Example 1 A method for preparing a nitrogen-doped porous carbon material adsorbent for treating dye wastewater comprises the following steps:

[0063] (1) Take an appropriate amount of walnut shells and air-dry them at 120°C for 24 hours;

[0064] (2) The walnut shells and dicyandiamide obtained in step (1) were mixed in a mass ratio of 2:1 and ground in a mortar for 30 minutes.

[0065] (3) Put the mixture obtained in step (2) into a vertical tube furnace, and under the protection of nitrogen, raise the temperature in the vertical tube furnace to 50 ° C at a heating rate of 5 ° C / min for carbonization treatment for 3 hours .

[0066] (4) After the material obtained in step (3) was cooled to room temperature, the obtained black powder was mixed with potassium carbonate at a mass ratio of 1:2 and ground in a mortar for 30 minutes.

[0067] (5) The product obtained in step (4) was placed in a vertical quartz tube, and under the protection of nitrogen, the temperature ...

Embodiment 2

[0073] Embodiment 2 A preparation method of a nitrogen-doped porous carbon material adsorbent for treating dye wastewater comprises the following steps:

[0074] (1) Take an appropriate amount of walnut shells and air-dry them at 100°C for 20 hours;

[0075] (2) The walnut shells and dicyandiamide obtained in step (1) were mixed in a mass ratio of 1:1 and ground in a mortar for 20 minutes.

[0076] (3) Put the mixture obtained in step (2) into a vertical tube furnace, and under the protection of nitrogen, raise the temperature in the vertical tube furnace to 550 ° C at a heating rate of 3 ° C / min for carbonization treatment for 1 hour .

[0077] (4) After the material obtained in step (3) was cooled to room temperature, the obtained black powder was mixed with potassium carbonate at a mass ratio of 1:2 and ground in a mortar for 20 minutes.

[0078] (5) The product obtained in step (4) was placed in a vertical quartz tube, and under the protection of nitrogen, the temperat...

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Abstract

The invention discloses a nitrogen-doped porous carbon material adsorbent for treating dye wastewater as well as a preparation method and application thereof. The preparation method comprises the following steps: uniformly mixing walnut shells and a nitrogen source, and grinding to obtain a first mixture; carrying out carbonization treatment on the first mixture in a protective atmosphere, and uniformly mixing and grinding an obtained carbonized product and a potassium salt to prepare a second mixture; and activating the second mixture in a protective atmosphere to obtain the nitrogen-doped porous carbon material adsorbent for treating dye wastewater. The nitrogen-doped porous carbon material adsorbent provided by the invention has a relatively good adsorption effect on malachite green dye, the adsorption efficiency is high, the adsorption capacity within 5min reaches 4001 mg / g, the adsorption capacity is large, the dye removal rate is high, the maximum adsorption capacity is 4500mg / g. The preparation process is simple, the cost is low, and the adsorbent is green and efficient, and has a purification effect on various types of dye, and has potential application value in the aspect of dye wastewater treatment.

Description

technical field [0001] The invention relates to a nitrogen-doped porous carbon material adsorbent, in particular to a nitrogen-doped porous carbon material adsorbent which can be used for rapid purification of dye wastewater, its preparation method and application, and belongs to the technical field of sewage treatment. Background technique [0002] With the rapid development of modern industry, a large amount of toxic dyes are released in the process of industrial production. It is reported that 700,000 tons of industrial wastewater containing nearly 10,000 kinds of toxic dyes are produced worldwide every year. If the aforementioned industrial wastewater containing synthetic dyes is not properly treated, it is likely to pose serious threats to human health, such as lung diseases, cancer, and other complications (L.M. Bai, S. Wang, Z. Y. Wang, E. L. Hong, Y .Wang, C.H.Xia, B.Q.Wang, Kinetics and mechanism of photocatalytic degradation of methyl orange inwater by mesoporous ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20C02F1/28B01J20/30C02F101/30
CPCB01J20/20B01J20/0259B01J20/041C02F1/283C02F1/281C02F2101/308Y02W10/37
Inventor 李爽邵旗招李玉莹刘慧慧张瑞莹邓洁
Owner NORTHWEST UNIV(CN)
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