Preparation method and use of loading activated carbon

A technology of activated carbon and application, applied in the field of preparation of loaded activated carbon, which can solve the problems of interference, the effectiveness of removing organic matter cannot be guaranteed, and the effect is minimal, and achieve the effects of long life, low cost and easy operation

A technology of activated carbon and application, applied in the field of preparation of loaded activated carbon, which can solve the problems of interference, the effectiveness of removing organic matter cannot be guaranteed, and the effect is minimal, and achieve the effects of long life, low cost and easy operation

CN102794183AInactive Publication Date: 2012-11-28EAST CHINA UNIV OF SCI & TECH
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] 1. Pretreatment: Grind the activated carbon to 10-20 mesh, wash with deionized water to remove impurities in the activated carbon, until the supernatant is clear and transparent, adjust the pH value to 6.2.

[0037] 2. FeSO 4 .7H 2 O and polyethylene glycol PEG-4000 were dissolved in the mixed system of ethanol and water, wherein the volume ratio of ethanol and water was 4:6; FeSO 4 .7H 2 The mass fraction of O relative to ethanol and water is 6.5%-10%, and the mass fraction of polyethylene glycol PEG-4000 relative to ethanol and water is 2.5%-5%. In the container, add 10g GAC again, stir evenly, at this moment pass nitrogen, remove the dissolved oxygen in the system. Weigh 1.71g of sodium borohydride and dissolve it in 100ml of deionized water to prepare a 0.45mol / L reducing solution. Under the conditions of continuous feeding of nitrogen into the system and mechanical stirring, slowly add the reducing solution through a peristaltic pump to control the dripping spee...

Embodiment 2

[0044] 1. Pretreatment: Grind the activated carbon to 20-40 mesh, wash with deionized water to remove impurities in the activated carbon, and adjust the pH value to 7 until the supernatant is clear and transparent.

[0045] 2. FeSO 4 .7H 2 O and polyethylene glycol PEG-4000 were dissolved in the mixed system of ethanol and water, wherein the volume ratio of ethanol and water was 4:6; FeSO 4 .7H 2 The mass fraction of O relative to ethanol and water is 5% to 10%, and the mass fraction of polyethylene glycol PEG-4000 relative to ethanol and water is 3.5% to 5%. In the container, add 10g GAC again, stir evenly, at this moment pass nitrogen, remove the dissolved oxygen in the system. Weigh 1.71g of sodium borohydride and dissolve it with 100ml of deionized water to prepare a 0.45mol / L reducing solution. Under the conditions of continuous feeding of nitrogen into the system and mechanical stirring, the reducing solution is slowly added through a peristaltic pump to control the d...

Embodiment 3

[0051] Example 3 (the format of the indentation of the first line below has been adjusted, and it is unified with examples 1 and 2)

[0052] 1. Pretreatment: Grind the activated carbon to 10-20 mesh, wash with deionized water to remove impurities in the activated carbon, until the supernatant is clear and transparent, adjust the pH value to 7.

[0053] 2. FeSO 4 .7H 2 O and polyethylene glycol PEG-4000 were dissolved in the mixed system of ethanol and water, wherein the volume ratio of ethanol and water was 4:6; FeSO 4 .7H 2 The mass fraction of O relative to ethanol and water is 5% to 10%, and the mass fraction of polyethylene glycol PEG-4000 relative to ethanol and water is 3% to 5%. In the container, add 10g GAC again, stir evenly, at this moment pass nitrogen, remove the dissolved oxygen in the system. Weigh 1.71g of sodium borohydride and dissolve it with 100ml of deionized water to prepare a 0.45mol / L reducing solution. Under the conditions of continuous feeding of n...

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Abstract

The invention relates to a preparation method and a use of loading activated carbon. The preparation method comprises the following steps of pre-treating raw coal activated carbon, grinding by a grinder, screening out activated carbon particles having sizes of 10 to 60 meshes, washing by deionized water until a supernatant does not contain obvious impurities, putting the washed activated carbon particles into an oven, drying at a temperature of 105 DEG C for 12 hours, weighing an appropriate amount of FeSO4.7H2O according to actual requirements, dissolving the FeSO4.7H2O in 100ml of an ethanol / water (40 / 60, v / v) mixed system, adding an appropriate amount of polyethylene glycol PEG-4000 as a dispersing agent into the mixed solution obtained by the previous step, adding an appropriate amount of the activated carbon particles into the mixed solution after full dissolution, dropwisely adding a sodium borohydride solution into the mixed solution with mechanical stirring in a nitrogen protective atmosphere for a reaction, and carrying out loading of a bimetal palladium after the reaction is finished to obtain the loading activated carbon. The loading activated carbon can be used for treating chlorinated hydrocarbon in ground water. The preparation method has the advantages that a process flow is simple; process equipment is simple; operation and management are easy; a cost is low; an investment is low; and chlorinated hydrocarbon removal efficiency is high.

Description

【Technical field】 [0001] The invention relates to the technical field of activated carbon, in particular to a preparation method and application of loaded activated carbon. 【Background technique】 [0002] Chlorinated aliphatic hydrocarbons (CAHs) are a kind of artificially synthesized organic substances with special odor that are seriously harmful to the human body and the environment. pollute. However, as an important class of chemical raw materials and organic solvents, it is widely used in the chemical industry, metal cleaning, electronic dismantling, pesticides and other industries. [0003] Activated carbon is a commonly used adsorbent. The raw materials used are wood, fruit stones, coal, petroleum and crops, etc., which are shaped and activated by appropriate methods. The shapes of activated carbon are powder, spherical, columnar and broken, and the activation methods include water vapor activation and zinc chloride activation. The activated carbon adsorption proces...

Claims

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Application Information

Patent Timeline
28 Nov 2012
Publication
CN102794183A
IPC
B01J23/89; C02F1/28; C02F1/58; C02F101/36
Inventors
张巍; 刘诺