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A mechanochemical preparation method of a thyne-rich carbon material and its application in the adsorption of heavy metal ions in aqueous solution

A mechanochemical, carbon material technology, applied in chemical instruments and methods, other chemical processes, adsorbed water/sewage treatment, etc.

Active Publication Date: 2021-06-08
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the existing literature and patents, there is no literature report on the preparation of sulfur-alkyne-rich carbon materials by ball milling under normal temperature and pressure conditions using calcium carbide and carbon disulfide as raw materials.

Method used

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  • A mechanochemical preparation method of a thyne-rich carbon material and its application in the adsorption of heavy metal ions in aqueous solution
  • A mechanochemical preparation method of a thyne-rich carbon material and its application in the adsorption of heavy metal ions in aqueous solution
  • A mechanochemical preparation method of a thyne-rich carbon material and its application in the adsorption of heavy metal ions in aqueous solution

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Weigh 4g of calcium carbide powder into a 250mL ball mill jar, add 2.37g of carbon disulfide liquid, seal it, and evacuate the ball mill jar. The ball mill jar was placed in a planetary ball mill, and ball milled at 600 rpm for 6 hours. In order to prevent the machine from overheating, the jacket water is used for cooling, and it is stopped for 10 minutes every 50 minutes of operation, so as to ensure that the temperature in the tank is below 60°C. After the reaction is finished, the ball mill tank is opened to obtain a black carbon material, and the impurity in the carbon material is removed by acid washing, water washing and ethanol washing, and the thionyl-rich carbon material of the present invention is obtained after drying.

[0023] Weigh 25 mg of the adsorbent (the thyne-rich carbon material described in this example), add it to 50 g of industrial wastewater with a mercury ion concentration of 500 ppm, and pH=5, ultrasonicate it for 10 minutes, and place it in a ...

Embodiment 2

[0027]Weigh 4g of calcium carbide powder into a 250mL ball mill jar, add 5.34g of carbon disulfide liquid at the same time, seal the ball mill jar, vacuumize it, put it in a planetary ball mill, and mill it at 600rpm for 6h. During the operation, in order to prevent the machine from overheating, a cooling water jacket is used to cool down, and it stops for 10 minutes every 50 minutes of operation. After the reaction is finished, the ball mill tank is opened to obtain a black carbon material, and impurities in the carbon material are removed after pickling, water washing and ethanol washing, and the thione-rich carbon material of the present invention is obtained by drying.

[0028] Weigh 25 mg of the adsorbent (the thyne-rich carbon material described in this example), add it to 50 g of industrial wastewater with a mercury ion concentration of 500 ppm, and pH=5, ultrasonicate it for 10 minutes, and place it in a constant temperature water bath at 25°C for 5 hours with magnetic ...

Embodiment 3

[0033] Weigh 4g of calcium carbide powder into a 250mL ball mill jar, add 10.68g of carbon disulfide liquid at the same time, seal the ball mill jar, vacuumize it, put it in a planetary ball mill, and mill it at 600rpm for 6h. In order to prevent the machine from overheating, use a cooling water jacket to cool down, and stop for 10 minutes every 50 minutes of operation. After the reaction is finished, the ball mill tank is opened to obtain a black carbon material, and impurities in the carbon material are removed after pickling, water washing and ethanol washing, and the thione-rich carbon material of the present invention is obtained by drying.

[0034] Weigh 25 mg of the adsorbent (the thyne-rich carbon material described in this example), add it to 50 g of industrial wastewater with a mercury ion concentration of 500 ppm, and pH=5, ultrasonicate it for 10 minutes, and place it in a constant temperature water bath at 25°C for 5 hours with magnetic stirring. It is measured th...

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Abstract

The invention discloses a mechanochemical preparation method of a thionyl-rich carbon material and its application in the adsorption of heavy metal ions in aqueous solution, belonging to the field of preparation and application of new functional carbon materials. The specific method is as follows: adding calcium carbide and carbon disulfide into a ball mill tank, and ball milling under normal temperature conditions, and the obtained solid product is pickled, washed with water, and dried to obtain a novel thione-rich carbon material product. The carbon material is a new type of high-efficiency heavy metal adsorbent. It has excellent adsorption capacity for heavy metal ions such as mercury, cadmium, lead, and copper in aqueous solution. g ‑1 , the adsorption capacity of cadmium ions is as high as 596.8mg-Cd g at the equilibrium concentration of 107.7ppm －1 , is currently one of the best adsorbents. The preparation process of the thione-rich carbon material is simple, the reaction conditions are mild, and the raw materials are cheap and easy to obtain. The obtained material has very excellent mercury removal performance, and also has good versatility to other heavy metal ions.

Description

technical field [0001] The invention belongs to the field of preparation of new functional carbon materials, and specifically relates to the preparation of carbon materials rich in sulfur and alkynyl groups by means of the mechanochemical reaction of calcium carbide and carbon disulfide, and the use of the carbon materials as adsorbents in the efficient removal of heavy metal ions in aqueous solutions application. Background technique [0002] Calcium carbide (commonly known as calcium carbide, CaC 2 ) is an important industrial chemical. Carbon materials made of calcium carbide have rich porous structure and high specific surface area, and they can be synthesized by calcium carbide and oxidants such as Cl 2 Or other substances containing carbon positive groups (such as oxalic acid, CO 2 And halogenated hydrocarbons, etc.) are prepared by thermochemical reaction under high temperature conditions. However, the above-mentioned thermochemical reaction is very violent, even ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/20C02F1/28B01J20/30C02F101/20
CPCB01J20/02B01J20/20C02F1/288C02F2101/20
Inventor 李春喜孙浩孟洪陆颖舟
Owner BEIJING UNIV OF CHEM TECH
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