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A kind of preparation method of high-efficiency amine functionalized carbon composite adsorbent

A high-efficiency amine-based and amine-functional technology, which is applied in chemical instruments and methods, adsorption water/sewage treatment, and other chemical processes, can solve the performance problems of amine-functionalized carbon composite adsorbents that have not yet been seen.

Inactive Publication Date: 2021-07-06
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] In the existing literature, there is no report on using APS to improve the performance of amine-functionalized carbon composite adsorbents, and there is no report on APS-assisted hydrothermal method.

Method used

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  • A kind of preparation method of high-efficiency amine functionalized carbon composite adsorbent

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] This embodiment relates to the preparation of an amine-based functionalized carbon composite adsorbent with improved performance and a comparative experiment. The specific steps include:

[0029] Sample (1): 6g of sucrose and 2g of hexamethylenediamine were dissolved in 40ml of deionized water, transferred to a stainless steel hydrothermal kettle lined with polytetrafluoroethylene, and placed in an oven at 200°C for 12 hours.

[0030] Sample (2): Add 6g of sucrose, 2g of hexamethylenediamine, and 0.1g of APS into 40ml of deionized water to dissolve, transfer to a stainless steel hydrothermal kettle lined with polytetrafluoroethylene, and carry out the same process as sample (1). operate.

[0031] After the reaction, the suspensions of the above two reactions were filtered respectively, the filter cake was washed three times with deionized water and rinsed once with ethanol, and the obtained filter cake was dried in an oven at 80° C. for 12 hours to obtain a brown powder...

Embodiment 2

[0035] Compared with Example 1, in this example, the amount of APS added in the sample (2) was changed to 0.05g, and a comparative experiment was carried out.

[0036] In Cr(VI) ion solution with an initial concentration of 200mg / L and pH=3, the adsorption capacities of samples (1) and (2) were 149.7mg / g and 176.5mg / g, respectively. The adsorption performance of the sample prepared by adding APS to assist hydrothermal treatment was significantly improved, and the adsorption capacity increased by 26.8mg / g, an increase of 17.9%.

Embodiment 3

[0038] Compared with Example 1, in this example, 12 g of glucose was used to replace 6 g of sucrose, and the amount of APS added in the sample (2) was 0.2 g, and a comparative experiment was carried out.

[0039] In the Cr(VI) ion solution with an initial concentration of 500 mg / L and pH=3, the adsorption capacities of samples (1) and (2) were 317.4 mg / g and 376.6 mg / g, respectively. The adsorption performance of the sample prepared by adding APS to assist hydrothermal treatment was significantly improved, and the adsorption capacity increased by 59.2mg / g, an increase of 18.6%.

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Abstract

The invention discloses a preparation method of a high-efficiency amine-based functionalized carbon composite adsorbent. The method is as follows: a mixed aqueous solution of sucrose, organic amine and ammonium persulfate (APS) is subjected to a hydrothermal reaction, and the Cr(VI ) ions with amine-based functionalized carbon composite adsorbents with high adsorption performance. In the invention, by adding a small amount of APS in the reaction liquid, the adsorption capacity of the adsorbent for Cr(VI) ions in waste water is significantly improved. Compared with the sample prepared without adding APS, the adsorption capacity of Cr(VI) ions on the amino-functionalized carbon composite adsorbent prepared after adding APS increased by 14.9-60.1 mg / g, an increase of 13.6-238.7%.

Description

technical field [0001] The invention relates to a preparation technology in the field of composite materials, in particular to a method for improving the adsorption performance of an amino-functionalized carbon composite adsorbent for heavy metal ions in water. Background technique [0002] Removing heavy metal ions in industrial wastewater is one of the most difficult problems in water pollution control. It is a more economical and effective method to enrich heavy metal ions with adsorbents and then separate them from water. Adsorbents with excellent performance can effectively remove heavy metal ions in wastewater, and reduce the concentration of heavy metal ions in wastewater to below the specified discharge standards. [0003] Activated carbon is a widely used high-efficiency adsorbent and is also used for the adsorption of heavy metal ions. However, the commonly used activated carbon needs to be activated at 800-2000°C to have good adsorption performance. The activation...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/24B01J20/30C02F1/28C02F101/22
CPCB01J20/20B01J20/24C02F1/288C02F2101/22
Inventor 蔡卫权刘裴
Owner WUHAN UNIV OF TECH
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