Microwave radiation preparation method of coal-based active carbon for removing pyrene

A technology of coal-based activated carbon and microwave radiation, which is applied in chemical instruments and methods, adsorption water/sewage treatment, inorganic chemistry, etc., can solve problems that have not been reported, and achieve the effects of low price, shortened preparation time, and excellent coal quality

Inactive Publication Date: 2014-07-02
SHIHEZI UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is no report on the removal of polycyclic aromatic hydrocarbon pyrene by coal-based activated carbon prepared by microwave method.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Crush the coal sample, grind it, and pass it through a 100-mesh sieve to make a powder; wash it with distilled water to remove impurities such as coal tar; dry the sample in an oven at 110°C for 4 hours to obtain a coal sample pretreatment product; pretreat 1.00g of coal sample The product is mixed evenly with 1.00g KOH, placed in a quartz tube and installed in a microwave reactor, under N 2 Protection, microwave time 8min, microwave radiation under microwave power 700W, after the reaction is over, take out the microwave-prepared sample after cooling; wash the microwave-prepared sample with hydrochloric acid, then wash with distilled water until the filtrate is neutral, and dry it in an oven at 110°C for 4 hours , to obtain coal-based activated carbon; accurately measure 30mL of simulated wastewater containing pyrene with an initial concentration of 300mg / L, put it in a 150mL conical flask with a stopper, and preheat it in a water bath constant temperature oscillator wit...

Embodiment 2

[0027] Crush the coal sample, grind it, and pass it through a 100-mesh sieve to make a powder; wash it with distilled water to remove impurities such as coal tar; dry the sample in an oven at 110°C for 4 hours to obtain a coal sample pretreatment product; pretreat 1.00g of coal sample The product is mixed evenly with 3.00g KOH, placed in a quartz tube and installed in a microwave reactor, under N 2 Protection, microwave time 8min, microwave radiation under microwave power 700W, after the reaction is over, take out the microwave-prepared sample after cooling; wash the microwave-prepared sample with hydrochloric acid, then wash with distilled water until the filtrate is neutral, and dry it in an oven at 110°C for 4 hours , to obtain coal-based activated carbon; accurately measure 30mL of simulated wastewater containing pyrene with an initial concentration of 300mg / L, put it in a 150mL conical flask with a stopper, and preheat it in a water bath constant temperature oscillator wit...

Embodiment 3

[0029]Crush the coal sample, grind it, and pass it through a 100-mesh sieve to make a powder; wash it with distilled water to remove impurities such as coal tar; dry the sample in an oven at 110°C for 4 hours to obtain a coal sample pretreatment product; pretreat 1.00g of coal sample The product is mixed evenly with 3.00g KOH, placed in a quartz tube and installed in a microwave reactor, under N 2 Protected, microwave time 4min, microwave radiation at a microwave power of 700W, after the reaction is over, take out the microwave prepared sample after cooling; wash the microwave prepared sample with hydrochloric acid, then wash with distilled water until the filtrate is neutral, and dry it in an oven at 110°C for 4 hours , to obtain coal-based activated carbon; accurately measure 30mL of simulated wastewater containing pyrene with an initial concentration of 300mg / L, put it in a 150mL conical flask with a stopper, and preheat it in a water bath constant temperature oscillator wit...

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Abstract

The invention discloses a method for removing a polycyclic aromatic hydrocarbon, namely pyrene, in simulated wastewater by virtue of adsorption by using coal-based active carbon which is prepared by taking Xinjiang anthracite as a carbon source and by use of a microwave radiation method. The coal-based active carbon is prepared through the steps of mixing activators with the anthracite, putting the mixture in a microwave reaction device, and finally carrying out one-step carbonization and activation in the presence of the activators KOH, ZNCl2 and H3PO4 under the conditions of an agent-to-material ratio of 1: 1 to 1:5, microwave time of 4-20 minutes, microwave power of 100W to 900W and N2 protection. The coal-based active carbons prepared in different embodiments have an average pore size of 28.22-42.54 angstroms, and also have relatively large specific surface area; the specific surface area is 623.84-1770.49 m<2>/g, and the total pore volume is 0.32-0.99 cm<2>/g. The adsorbing capacity of the coal-based active carbon to the pyrene reaches 89.43mg/g, and the removal rate of the pyrene is 99.37%. For removing the pyrene in wastewater, the coal-based active carbon prepared by use of a microwave method is characterized in that energy saving and high efficiency are shown in the preparation process of the active carbon, the active carbon has the advantages of large adsorption capacity, high adsorption rate, remarkable treatment efficiency and the like, and thus has excellent economic benefit and environmental benefit.

Description

technical field [0001] The invention relates to a method for preparing coal-based activated carbon for water treatment, in particular to a method for preparing coal-based activated carbon which has a good treatment effect on sewage with high pyrene content of polycyclic aromatic hydrocarbon pollutants. Background technique [0002] Polycyclic aromatic hydrocarbons are a class of compounds with a benzene ring structure and belong to persistent organic pollutants. It can exist for a long time in air and water, and it is difficult to biodegrade. They can interact with DNA, promote mutagenesis, or cause cancer. Pyrene is a typical polycyclic aromatic hydrocarbon. If it is exposed to it for a long time, it will cause headaches, fatigue, poor sleep, excitability, loss of appetite, increase in white blood cells, and increased erythrocyte sedimentation rate. It is difficult to effectively remove them by traditional physical and chemical methods, such as coagulation, flocculation, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/12C02F1/28C01B32/33C01B32/348
Inventor 武占省肖学敏闫豫君邓辉曹鹏
Owner SHIHEZI UNIVERSITY
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