Method for modifying activated carbon and application thereof

Abstract

The invention relates to a method for modifying activated carbon and an application of modified activated carbon and belongs to the technical field of new material preparation. The method comprises the following steps: firstly, adding the activated carbon into concentrated nitric acid, mixing, refluxing and stirring, thereby acquiring a modified product I; uniformly mixing thionyl chloride with DMF, thereby acquiring a mixed organic solution I; adding the modified product I into the mixed organic solution I, electromagnetically stirring and drying, thereby acquiring a modified product II; uniformly mixing ethanediamine with DMF, thereby acquiring a mixed organic solution II; adding the modified product II into the mixed organic solution II and electromagnetically stirring, thereby acquiring a modified product III; uniformly mixing tetrahydrofuran, triethylamine and chloroacetyl chloride, thereby acquiring a mixed organic solution III; adding the modified product III into the mixed organic solution III and stirring, thereby acquiring a modified product IV; adding the modified product IV into cuprous chloride and 4,4'-bipyridine, thereby acquiring a mixture; uniformly mixing vinyl imidazole with DMF, thereby acquiring a mixed organic solution IV; adding the mixture into the mixed organic solution IV, thereby acquiring the modified activated carbon. Compared with the untreated activated carbon, the modified activated carbon has higher adsorbing capacity.

Description

technical field

[0001] The invention relates to a method for modifying activated carbon and its application, belonging to the technical field of new material preparation. Background technique

[0002] Dye production wastewater is one of the most difficult industrial wastewater. In recent years, the development of textile industry has driven the development of dye production. Surveys show that the world's annual dyes exceed 700,000 tons, of which 2% are directly discharged into water bodies and discharged in the form of wastewater, and 10% are lost in the subsequent textile dyeing process. The composition of dye wastewater is complex, the water quality changes greatly, the color is deep, the concentration is high, and the treatment is difficult.

[0003] Activated carbon is a black porous powder that is activated by carbonaceous substances. It has the characteristics of developed internal voids, large specific surface area, and strong adsorption capacity. Because of its st...

Examples

Embodiment 1

[0019] Such as figure 1 Shown, the method for this modified activated carbon, its concrete steps are as follows:

[0020] (1) First, add 100g of activated carbon to the liquid-solid ratio of 100:20ml / g, add concentrated nitric acid (the concentration of concentrated nitric acid is 60% g / ml) and mix and reflux for 10 hours. After the reaction, wash with water until the pH is equal to 7, and dry to obtain the modification Product I;

[0021] (2) Mix thionyl chloride and DMF uniformly according to the volume ratio of 10:40 to obtain the mixed organic liquid I, and then add the modified product I obtained in step (1) into the mixed organic liquid according to the liquid-solid ratio of 50:19ml / g Liquid I was electromagnetically stirred at 60°C for 10 hours, filtered and washed with DMF after the reaction, and dried to obtain modified product II;

[0022] (3) Mix ethylenediamine and DMF uniformly according to the volume ratio of 10:40 to obtain the mixed organic liquid II, then ad...

Embodiment 2

[0028] Such as figure 1 Shown, the method for this modified activated carbon, its concrete steps are as follows:

[0029] (1) First, add 100g of activated carbon into concentrated nitric acid (the concentration of concentrated nitric acid is 90% g / ml) according to the liquid-solid ratio of 150:25ml / g, mix and reflux for 12 hours. After the reaction, wash with water until the pH is equal to 7, and dry to obtain the modification Product I;

[0030] (2) Mix thionyl chloride and DMF uniformly according to the volume ratio of 12:50 to obtain the mixed organic liquid I, and then add the modified product I obtained in step (1) into the mixed organic liquid according to the liquid-solid ratio of 75:25ml / g Liquid I was electromagnetically stirred at 80°C for 12 hours, filtered and washed with DMF after the reaction, and dried to obtain modified product II;

[0031] (3) Mix ethylenediamine and DMF uniformly according to the volume ratio of 15:45 to obtain the mixed organic liquid II, ...

Embodiment 3

[0037] Such as figure 1 Shown, the method for this modified activated carbon, its concrete steps are as follows:

[0038] (1) First, add 100g of activated carbon into concentrated nitric acid (the concentration of concentrated nitric acid is 80% g / ml) according to the liquid-solid ratio of 125:23ml / g, mix and reflux for 11 hours. After the reaction, wash with water until the pH is equal to 7, and dry to obtain the modification Product I;

[0039] (2) Mix thionyl chloride and DMF uniformly according to the volume ratio of 15:60 to obtain the mixed organic liquid I, and then add the modified product I obtained in step (1) into the mixed organic liquid according to the liquid-solid ratio of 63:22ml / g Liquid I was electromagnetically stirred at 70°C for 11 hours, filtered and washed with DMF after the reaction, and dried to obtain modified product II;

[0040] (3) Mix ethylenediamine and DMF uniformly according to the volume ratio of 20:50 to obtain the mixed organic liquid II, ...

technical field

[0001] The invention relates to a method for modifying activated carbon and its application, belonging to the technical field of new material preparation. Background technique

[0002] Dye production wastewater is one of the most difficult industrial wastewater. In recent years, the development of textile industry has driven the development of dye production. Surveys show that the world's annual dyes exceed 700,000 tons, of which 2% are directly discharged into water bodies and discharged in the form of wastewater, and 10% are lost in the subsequent textile dyeing process. The composition of dye wastewater is complex, the water quality changes greatly, the color is deep, the concentration is high, and the treatment is difficult.

[0003] Activated carbon is a black porous powder that is activated by carbonaceous substances. It has the characteristics of developed internal voids, large specific surface area, and strong adsorption capacity. Because of its st...

Examples

Embodiment 1

[0019] Such as figure 1 Shown, the method for this modified activated carbon, its concrete steps are as follows:

[0020] (1) First, add 100g of activated carbon to the liquid-solid ratio of 100:20ml / g, add concentrated nitric acid (the concentration of concentrated nitric acid is 60% g / ml) and mix and reflux for 10 hours. After the reaction, wash with water until the pH is equal to 7, and dry to obtain the modification Product I;

[0021] (2) Mix thionyl chloride and DMF uniformly according to the volume ratio of 10:40 to obtain the mixed organic liquid I, and then add the modified product I obtained in step (1) into the mixed organic liquid according to the liquid-solid ratio of 50:19ml / g Liquid I was electromagnetically stirred at 60°C for 10 hours, filtered and washed with DMF after the reaction, and dried to obtain modified product II;

[0022] (3) Mix ethylenediamine and DMF uniformly according to the volume ratio of 10:40 to obtain the mixed organic liquid II, then ad...

Embodiment 2

[0028] Such as figure 1 Shown, the method for this modified activated carbon, its concrete steps are as follows:

[0029] (1) First, add 100g of activated carbon into concentrated nitric acid (the concentration of concentrated nitric acid is 90% g / ml) according to the liquid-solid ratio of 150:25ml / g, mix and reflux for 12 hours. After the reaction, wash with water until the pH is equal to 7, and dry to obtain the modification Product I;

[0030] (2) Mix thionyl chloride and DMF uniformly according to the volume ratio of 12:50 to obtain the mixed organic liquid I, and then add the modified product I obtained in step (1) into the mixed organic liquid according to the liquid-solid ratio of 75:25ml / g Liquid I was electromagnetically stirred at 80°C for 12 hours, filtered and washed with DMF after the reaction, and dried to obtain modified product II;

[0031] (3) Mix ethylenediamine and DMF uniformly according to the volume ratio of 15:45 to obtain the mixed organic liquid II, ...

Embodiment 3

[0037] Such as figure 1 Shown, the method for this modified activated carbon, its concrete steps are as follows:

[0038] (1) First, add 100g of activated carbon into concentrated nitric acid (the concentration of concentrated nitric acid is 80% g / ml) according to the liquid-solid ratio of 125:23ml / g, mix and reflux for 11 hours. After the reaction, wash with water until the pH is equal to 7, and dry to obtain the modification Product I;

[0039] (2) Mix thionyl chloride and DMF uniformly according to the volume ratio of 15:60 to obtain the mixed organic liquid I, and then add the modified product I obtained in step (1) into the mixed organic liquid according to the liquid-solid ratio of 63:22ml / g Liquid I was electromagnetically stirred at 70°C for 11 hours, filtered and washed with DMF after the reaction, and dried to obtain modified product II;

[0040] (3) Mix ethylenediamine and DMF uniformly according to the volume ratio of 20:50 to obtain the mixed organic liquid II, ...

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