A kind of preparation method of activated carbon shaped filter element with bactericidal function

The technology of activated carbon and filter element is applied in the field of preparation of activated carbon filter element.

Active Publication Date: 2016-06-29
TAIYUAN YINXIYUAN TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since bulk granular activated carbon cannot form a stable filtration structure during use, although it has certain antibacterial and bactericidal effects, it is very inconvenient to use and cannot effectively play its role
[0005] At present, it has not been found that tetrasilver tetroxide is synthesized on the activated carbon water purification filter element

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] 1. Put the activated carbon filter element into the mixed solution of 0.2% sulfuric acid and 0.3% hydrogen peroxide for immersion cleaning or pressure flushing for 10-20 minutes, take it out, and after centrifugal dehydration, place it in a vacuum drying oven at 80-100°C for later use.

[0020] 2. Put the molded filter element that has been dried and removed the surface reductivity into a silver nitrate solution with a concentration of 0.1% and let it stand for 30 minutes to allow it to fully absorb, then centrifugally dehydrate it, and dry it in a vacuum drying oven at 80-85°C for 4 Stand by after hours.

[0021] 3. Weigh 25 grams each of potassium persulfate and sodium hydroxide, dissolve them in 500 milliliters of pure water, and heat to 80°C as the reaction solution.

[0022] 4. Take out the activated carbon filter element impregnated and adsorbed silver from the drying oven, place it in the heated reaction liquid for 30-40 minutes of chemical reaction, take it out ...

Embodiment 2

[0025] 1. Remove the surface reducibility of the filter element according to Step 1 of Example 1.

[0026] 2. Put the filter element in step 1 into 0.3% silver nitrate solution for immersion, let it stand for full absorption, and then dehydrate and dry for 6 hours.

[0027] 3. Weigh 24 grams each of potassium persulfate and sodium hydroxide, dissolve them in 500 milliliters of pure water, and heat to 85°C to make the reaction solution.

[0028] 4. Put the filter elements treated in steps 1 and 2 in the reaction liquid, react in the reaction liquid at 85°C for 40 minutes, and keep warm for 45 minutes.

[0029] 5. Take out the filter element from the reaction solution and wash it with pure water (remove the by-products sodium sulfate, potassium sulfate and potassium nitrate (sodium) produced by the reaction) until the pH value of the washing solution is 7.5, dehydrate and dry to constant weight to obtain the finished product.

Embodiment 3

[0031] 1. Remove the surface reducibility of the filter element according to Step 1 of Example 1.

[0032] 2. Place the dried filter element in step 1 in a silver nitrate solution with a concentration of 0.5% and let it stand for 30 minutes to fully absorb, then dehydrate and dry for 5 hours.

[0033] 3. Weigh 48 grams each of potassium persulfate and sodium hydroxide, dissolve them in 1000 milliliters of pure water, and heat to 90°C as the reaction solution.

[0034] 4. Place the filter element treated in steps 1 and 2 in the reaction solution at 90°C for 30 minutes and keep it warm for 40 minutes.

[0035] 5. Take out the filter element from the reaction solution and rinse it with pure water until the pH value of the rinse solution is 8.5, dehydrate and vacuum dry at 105°C to obtain the product.

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Abstract

The invention discloses a preparation method of an activated carbon shaped filter element with a bactericidal function. The steps are as follows: first, soaking the activated carbon shaped filter element in a solution containing an acidic oxidant to remove surface reduction, dehydration, and drying; secondly, the dried filter element Put it in the silver nitrate solution and let it stand for full adsorption, dehydration, and drying; put the silver-loaded activated carbon filter again in the reaction solution prepared by potassium persulfate and sodium hydroxide for 30-40 minutes, take it out and keep it at 60-70°C for 30 minutes ~45 minutes; Finally, wash the filter element with pure water until the pH value is 7.5~8.5, then perform centrifugal dehydration and dry it. The result of EPS energy spectrometer scanning electron microscope analysis of the activated carbon filter element obtained by the present invention shows that the product silver tetraoxide molecular crystal battery reacts completely without other impurities, and its crystals are evenly distributed inside the activated carbon filter element without silver shedding phenomenon, antibacterial, The bactericidal effect is remarkable, and the bactericidal rate reaches 99.5%.

Description

technical field [0001] The invention belongs to the field of water treatment, and in particular relates to a preparation method of an activated carbon filter element with a bactericidal function. Background technique [0002] Silver has a bactericidal and disinfecting effect, which was known as early as more than 2,000 years ago. By the 1930s, there were more than 400 kinds of drugs synthesized around silver. It was not until the discovery of antibiotics that silver compounds gradually withdrew from the field of medical sterilization; With the emergence of powerful bacteria in modern times, the medicinal bactericidal research of silver compounds has been paid more attention to. Since American scientists synthesized silver tetraoxide in the 1960s, Israeli physicist Aantelman found that it has Strong bactericidal effect, until it was confirmed in the 1990s that it is a multivalent silver compound with two trivalent silver and two monovalent silver ions combined with four oxyge...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D39/14C02F1/28C02F1/50A01N59/16
Inventor 邢建权荆效民吴冬建张旭杨大治程效民
Owner TAIYUAN YINXIYUAN TECH CO LTD
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