Magnetically-separable activated carbon composite material preparation method

A technology of composite materials and magnetic activated carbon, applied in the direction of separation methods, dispersed particle separation, chemical instruments and methods, etc., can solve the problems of reduced decontamination efficiency, filter blockage and damage, secondary pollution, etc., and achieves simple operation and realization of reuse Utilization, low cost effect

Inactive Publication Date: 2019-05-10
CHINA JILIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In traditional sewage treatment, filtration is mainly used to separate activated carbon from sewage, but this method is prone to the disadvantage of clogging and damage to the filter screen, and the cleaning of the filter screen will also cause secondary pollution, reducing the decontamination efficiency

Method used

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  • Magnetically-separable activated carbon composite material preparation method
  • Magnetically-separable activated carbon composite material preparation method
  • Magnetically-separable activated carbon composite material preparation method

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specific Embodiment approach 1

[0009] Specific implementation method 1: Firstly, the activated carbon is pulverized into activated carbon particles, which are screened through a 200-mesh sieve; the surface of the activated carbon particles is modified with concentrated sulfuric acid, fully washed (pH=7) and dried. Take 5 parts of activated carbon, 2 parts of Nd(NO 3 ) 3 ·6H 2 O, 1 part of Sr(NO 3 ) 2 and 3 parts of Mn(NO 3 ) 2 Dissolve in a mixed solution of 40 parts of deionized water and 20 parts of alcohol, and stir magnetically at 80°C for 1 hour. Then add 6 parts of citric acid and a few drops of ethylene glycol as a complexing agent, stir for 2 hours, add ammonia water dropwise to adjust the pH of the solution to 7, adjust the temperature of the water bath to 80°C, and stir until the solution becomes a sol state. The obtained sol was transferred to a blast drying oven for drying at 80° C. for 6 hours to obtain a gel. Under nitrogen protection, the gel was sintered in a tube furnace at 800 °C fo...

specific Embodiment approach 2

[0010] Specific embodiment 2: Firstly, the activated carbon is pulverized into activated carbon particles, which are screened through a 200-mesh sieve; the surface of the activated carbon particles is modified with concentrated sulfuric acid, fully washed (pH=7) and dried. Take 5 parts of activated carbon, 2 parts of La(NO 3 ) 3 ·6H 2 O, 1 part of Sr(NO 3 ) 2 and 3 parts of Mn(NO 3 ) 2 Dissolve in a mixed solution of 40 parts of deionized water and 20 parts of alcohol, and stir magnetically at 80°C for 1 hour. Then add 6 parts of citric acid and a few drops of ethylene glycol as a complexing agent, stir for 2 hours, add ammonia water dropwise to adjust the pH of the solution to 7, adjust the temperature of the water bath to 80°C, and stir until the solution becomes a sol state. The obtained sol was transferred to a blast drying oven for drying at 80° C. for 6 hours to obtain a gel. Under nitrogen protection, the gel was sintered in a tube furnace at 800 °C for 3 h. Aft...

specific Embodiment approach 3

[0011] Specific embodiment 3: The difference between this embodiment and specific embodiments 1 and 2 is that the amount of activated carbon in step 1 can be 3 to 10 parts. Others are the same as the first and second embodiments.

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Abstract

The invention relates to a magnetic activated carbon preparation method, in particular to a magnetically-separable activated carbon composite material and a preparation method thereof. The magnetically-separable activated carbon composite material is formed by compositing of activated carbon particles and a magnetic particle material, and activated carbon separation and extraction can be realizedby the aid of an external magnetic field. The method includes steps: step one, performing activated carbon extraction and surface modification; step two, taking activated carbon as a carrier to prepare two or more types of metal salt solutions according to certain proportions; step three, adding a certain quantity of citric acid, well mixing, dropwise adding ammonium hydroxide to adjust a pH value, and well stirring; step four, forming gel at a certain temperature; step five, sintering under shielding of nitrogen; step six, magnetically separating, washing and drying. The magnetically-separable activated carbon composite material and the preparation method thereof have advantages that the adsorption performance of bamboo charcoal is unaffected by loading of a small quantity of magnetic materials while magnetism of the activated carbon particles is realized, and separation and recovery of the activated carbon can be realized through the external magnetic field after adsorption of harmful impurities in sewage.

Description

technical field [0001] The invention relates to a preparation method of a magnetically separable activated carbon composite material. Background technique [0002] Activated carbon materials are generally processed amorphous carbon, which has a very large specific surface area and has good adsorption capacity for gases, inorganic or organic substances in solutions, and colloidal particles. At present, physical adsorption has always been considered as the most simple, effective, environmentally friendly and economical method to remove some harmful substances such as organic and inorganic in wastewater, and the preparation method of adsorption-grade activated carbon is relatively simple and low-cost. Therefore, activated carbon materials have been widely used in chemical industry, environmental protection, food processing, metallurgy, pharmaceutical refining, military Chemical protection and other fields. Especially in several fields such as sewage treatment and air pollutio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/28B01J20/30B01D53/02C02F1/28
Inventor 陈建宝洪波
Owner CHINA JILIANG UNIV
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