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Hydrothermal charcoal adsorbent with functionalized surface functional groups, preparation method therefor and application of hydrothermal charcoal adsorbent

A surface functional group, functionalization technology, applied in chemical instruments and methods, adsorption water/sewage treatment, water pollutants, etc. Effect

Inactive Publication Date: 2019-06-07
GUANGZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the above method needs to consume a large amount of water resources, and the obtained solid product needs to be separated by centrifugation, filtration and other methods, and the process is complicated.

Method used

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  • Hydrothermal charcoal adsorbent with functionalized surface functional groups, preparation method therefor and application of hydrothermal charcoal adsorbent
  • Hydrothermal charcoal adsorbent with functionalized surface functional groups, preparation method therefor and application of hydrothermal charcoal adsorbent
  • Hydrothermal charcoal adsorbent with functionalized surface functional groups, preparation method therefor and application of hydrothermal charcoal adsorbent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] (1) Take 3 parts by mass of each of the 2 groups of glucose and place them in small glass bottles, and transfer the small glass bottles to the polytetrafluoroethylene liner of the reactor;

[0031] (2) The first group takes 3 parts by volume of water without adding additives, and the second group takes a mixed solution of 1.5 parts by volume of water and 1.5 parts by volume of ethylenediamine, and adds them to the polytetrafluoroethylene in the hydrothermal reaction kettle outside the glass bottle respectively. In the liner, wherein the ratio of the second group of water to the additive is 1:1, and the mass ratio of glucose to the additive is 2.22:1;

[0032] (3) Seal the reactor and conduct a hydrothermal reaction at 180°C for 14 hours. After cooling down to room temperature naturally, transfer the product out, put it in a vacuum oven at 60°C for 12 hours and then grind it to obtain the two groups of adsorbent samples. , wherein the product of Group 1 without introduci...

Embodiment 2

[0035] (1) Take 3 parts by mass of each of the 2 groups of glucose and place them in a small glass bottle, and transfer the small glass bottle to the polytetrafluoroethylene liner of the reactor;

[0036] (2) The first group gets 1.5 parts by volume of water without adding additives, and the second group gets 1.5 parts by volume of ammonia water and adds it in the polytetrafluoroethylene liner of the reaction kettle outside the glass bottle, wherein the ratio of the second group of water and additives is 0:1.5, the mass ratio of glucose to additives is 2.2:1;

[0037] (3) After sealing the reactor, conduct a hydrothermal reaction at 170°C for 16 hours, cool it down to room temperature naturally, transfer the product out, put it in a vacuum drying oven at 60°C for 12 hours, and grind to obtain the two groups of adsorbent samples , wherein the product of Group 1 without introducing functional groups is named HC-2, and the product of Group 2 introducing functional groups is named...

Embodiment 3

[0040] (1) Take 3 parts by mass of each of the 2 groups of glucose and place them in a small glass bottle with a capacity of 3, and transfer the small glass bottle to the polytetrafluoroethylene liner of the reactor;

[0041] (2) The first group takes 3 volume parts of water without adding additives, and the second group takes a mixture of 1.5 volume parts of water and 1.5 volume parts of acrylic acid, and adds it to the polytetrafluoroethylene liner of the external reactor of the glass bottle. The ratio of two groups of water and additive is 1:1, and the mass ratio of glucose and additive is 1.9:1;

[0042] (3) After sealing the reactor, conduct a hydrothermal reaction at 190°C for 12 hours, cool it down to room temperature naturally, transfer the product out, dry it in a vacuum oven at 60°C for 12 hours, and grind to obtain the two groups of adsorbent samples , wherein the product without functional groups introduced in Group 1 is named HC-3, and the product with functional ...

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Abstract

The invention belongs to the technical field of adsorbents and discloses a hydrothermal charcoal adsorbent with functionalized surface functional groups capable of adsorbing a violently poisonous pollutant, i.e., Cr(VI), a preparation method therefor and an application of the hydrothermal charcoal adsorbent. According to the preparation method disclosed by the invention, the hydrothermal charcoaladsorbent with the functionalized surface functional groups is obtained through taking a carbon source as a solid phase, taking a carboxyl, amino or mercapto containing compound as an additive, enabling the carbon source and the additive not to be in direct contact, gasifying the additive, and subjecting the gasified additive to a gas-solid reaction with the solid phase. According to the preparation method disclosed by the invention, a one-step method is adopted, the process is simple, the conditions are moderate, and the energy consumption is low; and the prepared hydrothermal charcoal adsorbent, of which the surface is rich in functional groups such as a carboxyl group, an amino group and a mercapto-group, has the advantages that the adsorption performance to Cr(VI) is obviously improved, the adsorption capacity reaches up to 86.87mg / g, the removal rate reaches 99.04%, and the water residual concentration is lowered to 0.48mg / L and reaches national emission standards, so that the hydrothermal charcoal adsorbent can be applied to adsorption of the violently poisonous pollutant, i.e., Cr(VI) from water and has excellent adsorption performance.

Description

technical field [0001] The invention belongs to the technical field of adsorbents, and in particular relates to a surface functional group functionalized hydrothermal carbon adsorbent which can be used to adsorb highly toxic pollutant Cr(VI), and a preparation method and application thereof. Background technique [0002] With the development of industry, the massive discharge of industrial wastewater has caused increasingly serious water pollution. Industrial wastewater contains a variety of heavy metal ions, which pose a serious threat to the living environment of human beings. Chromium-containing wastewater is a type of wastewater that is extremely polluting and harmful to humans. Because chromium is widely used in industry, a series of industries such as metallurgy, chemical industry, electroplating, and textiles will produce a large amount of chromium-containing wastewater. The valence states of chromium in the water environment are mainly Cr(III) and Cr(VI), of which Cr...

Claims

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Application Information

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IPC IPC(8): B01J20/22B01J20/30C02F1/28C02F101/22
Inventor 蔡卫权刘丽强
Owner GUANGZHOU UNIVERSITY
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