Preparation method for activated carbon material for drinking water purification

A technology of activated carbon and drinking water, applied in chemical instruments and methods, other chemical processes, adsorption water/sewage treatment, etc., can solve the problems of inconvenience, difficult treatment, secondary pollution of water quality, etc. The effect of secondary pollution and increasing the number of mesopores

Active Publication Date: 2015-11-18
QINGYUAN HUAXINDA BEVERAGE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the adsorption effect of powder activated carbon is very good, it is difficult to handle

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Remove impurities from anthracite and crush it into particles with a particle size of 0.01-0.1mm; add polymethacrylate to stir and shape, calcinate at 120°C for 10h, calcinate at 800°C for 12h, activate at 800°C and steam for 24h, That is to obtain activated carbon; prepare an aqueous solution of calcium nitrate with a mass concentration of 20%; impregnate the activated carbon in the obtained aqueous solution for 10 hours; freeze the activated carbon impregnated with the aqueous solution at a low temperature of -30° C. for 5 hours; heat up to 120° C. and dry for 3 hours; Activated under supercritical water conditions for 3 hours; washed with hydrogen peroxide at room temperature and then washed with water; dried to obtain a modified activated carbon carrier;

Embodiment 2

[0022] Coal-based activated carbon with a loss-on-ignition rate of 30% is adopted; calcium nitrate and sodium nitrate are prepared with a ratio of 3:1 to prepare an aqueous solution with a mass concentration of 25%, and the activated carbon is soaked in the obtained aqueous solution for 10 hours; the activated carbon soaked in the aqueous solution is placed in the - Freeze at a low temperature of 20°C for 10 hours; heat up to 150°C and dry for 2 hours; activate under supercritical water for 3 hours; wash with hydrogen peroxide at room temperature and then wash with water; dry to obtain a modified activated carbon carrier;

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Abstract

The present invention discloses a preparation method for an activated carbon material for drinking water purification. By virtue of an adsorption improver, cryogenic freezing treatment and supercritical water treatment, pore size distribution of the activated carbon is improved. Compared to the prior art, according to a catalytic material provided by the invention, by taking modified activated carbon as a carrier, the number and proportion of mesopores in the activated carbon are increased, the adsorption capacity of small molecule organic substances is stronger, and meanwhile few macropores exist in the pore size distribution, so that the activated carbon material has a certain adsorption capacity on bacteria and microorganisms. Moreover, the adsorbent has the characteristic of being good in formability, can be processed to various specific shapes, and is convenient to mount and use.

Description

technical field [0001] The invention relates to an activated carbon adsorption material capable of deeply purifying drinking water and a preparation method thereof, belonging to the technical field of water purification. Background technique [0002] With the increasing water pollution, the content of organic matter in urban drinking water sources has increased significantly. However, most domestic water plants still use conventional water purification processes, which can only achieve a removal rate of 40% for low-concentration organic pollutants in water sources. , it has been difficult to ensure the safety and reliability of drinking water, so the advanced treatment technology of drinking water has been widely concerned. [0003] Activated carbon material is an important amorphous carbon material. It is a black porous solid with stable chemical properties, developed pore structure and huge specific surface area. It is an excellent adsorbent with rich pore structure and hu...

Claims

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Application Information

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IPC IPC(8): B01J20/20B01J20/30C02F1/28
Inventor 席海峰
Owner QINGYUAN HUAXINDA BEVERAGE CO LTD
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