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Preparation method of silver-loaded activated carbon and application thereof to tap water purification treatment

A technology of silver-loaded activated carbon and activated carbon, applied in the field of activated carbon, can solve the problems of large water treatment capacity, insufficient silver ion adsorption, and difficulty in achieving long-term sterilization, so as to avoid consumption and loss, and inhibit the proliferation of zooplankton.

Inactive Publication Date: 2013-07-10
JINAN UNIVERSITY
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  • Abstract
  • Description
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Problems solved by technology

The adsorption rate of silver ions in this preparation method is not high enough, and the adsorption of silver ions on the surface of activated carbon is not strong enough, so it is difficult to achieve a long-term sterilization effect. It is suitable for small water purification equipment, such as mineral spring pots
However, the water treatment capacity of the waterworks is extremely large, and the tap water has a large force on the surface when it passes through the silver-loaded activated carbon particles. Therefore, it is required that the adsorption rate of silver ions is high and the adsorption is firm. At the same time, the non-silver chemical functional groups need to be completely disappeared after treatment. , so as not to affect the water quality

Method used

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  • Preparation method of silver-loaded activated carbon and application thereof to tap water purification treatment
  • Preparation method of silver-loaded activated carbon and application thereof to tap water purification treatment

Examples

Experimental program
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Effect test

Embodiment 1

[0033] (1) the silver nitrate solution that concentration is 100 mg / liter is prepared with distilled water;

[0034] (2) Clean activated carbon (Shanxi Xinhua Activated Carbon Co., Ltd., granular diameter 1-3 mm (3-8 mesh)) with distilled water twice; Mixing at a mass ratio of 0.1:100, stirring and reacting at 25°C for 24 hours, to obtain activated carbon that adsorbs silver ions;

[0035] (3) The activated carbon adsorbing silver ions prepared in step (2) was heated at 400° C. for 5 hours to obtain silver-loaded activated carbon, and the small particle size silver-loaded activated carbon was removed with a 50-mesh sieve. The obtained silver-loaded activated carbon has a particle size of 0.8 to 3 mm. After the silver-loaded activated carbon is shaken and eluted in distilled water at 25° C. for 24 hours, the amount of silver on the activated carbon is tested, and it is proved that the weight percentage of silver is 0.1%. Pass The size of silver particles detected by transmissi...

Embodiment 2

[0037] (1) prepare the silver nitrate solution that concentration is 1000 mg / liter with distilled water;

[0038] (2) Clean activated carbon (Shanxi Xinhua Activated Carbon Co., Ltd., granular diameter 1-3 mm (3-8 mesh)) with distilled water twice; The mass ratio is 0.5: 100 mixed, stirred and reacted at 25°C for 24 hours to obtain activated carbon adsorbing silver ions;

[0039](3) The activated carbon for absorbing silver ions prepared in step (2) was heated at 500° C. for 4 hours to obtain silver-loaded activated carbon, and the small particle size silver-loaded activated carbon was removed with a 50-mesh sieve. The obtained silver-loaded activated carbon has a particle size of 0.8 to 3 mm. After the silver-loaded activated carbon is shaken and eluted in distilled water at 25° C. for 24 hours, the amount of silver on the activated carbon is tested, and it is proved that the weight percentage of silver is 0.5%. Pass The size of the silver particles detected by a transmissio...

Embodiment 3

[0041] (1) prepare the silver nitrate solution that concentration is 500 mg / liter with distilled water;

[0042] (2) Clean activated carbon (Shanxi Xinhua Activated Carbon Co., Ltd., granular diameter 1-3 mm (3-8 mesh)) with distilled water twice; The mass ratio is 0.3: 100 mixed, stirred and reacted at 25°C for 24 hours to obtain activated carbon adsorbing silver ions;

[0043] (3) The activated carbon adsorbing silver ions prepared in step (2) was heated at 460° C. for 4 hours to obtain silver-loaded activated carbon, and the small particle size silver-loaded activated carbon was removed with a 50-mesh sieve. The obtained silver-loaded activated carbon has a particle size of 0.8 to 3 mm. After the silver-loaded activated carbon is shaken and eluted in distilled water at 25° C. for 24 hours, the amount of silver on the activated carbon is tested, and it is proved that the weight percentage of silver is 0.3%. Pass The size of silver particles detected by transmission electron...

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Abstract

The invention discloses a preparation method of a silver-loaded activated carbon and application thereof to tap water purification treatment. The method comprises steps of: preparing a silver nitrate solution with a concentration of 100-1000 milligram / liter; mixing the silver nitrate solution and cleaned granular active carbon in a mass ratio of silver to charcoal being 0.1-0.5:100 and reactingwith stirring for 12-48 h at 5-50 DEG C to obtain silver ion adsorbed active carbon; heating the silver ion adsorbed active carbon at 400-500 DEG C for 4-5 h and depriving small particle size silver ion adsorbed active carbon through a 50 mesh screen to obtain the silver-loaded activated carbon. The preparation method of the invention realizes active carbon loaded with 0.1-1% of silver and a silver utilization rate exceeding 99.6%. High temperature treated silver-loaded activated carbon is used for treating tap water for 60 days, and the treated tap water contains no silver ion according to atomic emission spectroscopy analysis; and silver ion can be detected in tap water treated with activated carbon, which is not treated by high temperature in first two week detection. Accordingly, the silver-loaded activated carbon is suitable for being applied to tap water purification treatment.

Description

technical field [0001] The invention relates to an activated carbon, in particular to a preparation method of silver-loaded activated carbon and its application in tap water purification treatment. Background technique [0002] Tap water plays an important role in people's life and work, how to improve the quality of tap water to ensure people's daily water safety is of great significance. At present, the methods for improving the water quality of tap water mainly include disinfection methods, among which liquid chlorine disinfection, chlorine dioxide disinfection, ultraviolet disinfection, and ozone disinfection are widely used in tap water treatment. Ozone has excellent sterilization and disinfection effects, and is the most effective disinfectant in the current dosing disinfection method. With the continuous improvement of living standards, people's requirements for water quality are also increasing, and the application of ozone disinfection will continue to increase. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B31/08C02F1/50C02F1/28
Inventor 杨宇峰陈鹏尤为汤顺清王庆
Owner JINAN UNIVERSITY
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