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A preparation method for methylene blue-containing silicon dioxide-coated particles that prevent methylene blue from being released

A technology containing methylene blue and methylene blue, applied in chemical instruments and methods, other chemical processes, water/sludge/sewage treatment, etc., can solve the problems of less research reports, secondary pollution of water and soil, etc., and achieve environmental compatibility Good, reduce outward release, simple process effect

Active Publication Date: 2020-07-07
SHANDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After the adsorbent is collected, it is often stacked in the open air. If it encounters environmental conditions with high humidity such as rain or snowfall, methylene blue will be released again, which will cause serious secondary pollution to water and soil.
Therefore, how to ensure that methylene blue is no longer leaked after being adsorbed by the adsorbent, that is, it is extremely necessary to develop a method to prevent the release of methylene blue from the inside of the adsorbent, but there are very few related research reports

Method used

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  • A preparation method for methylene blue-containing silicon dioxide-coated particles that prevent methylene blue from being released
  • A preparation method for methylene blue-containing silicon dioxide-coated particles that prevent methylene blue from being released
  • A preparation method for methylene blue-containing silicon dioxide-coated particles that prevent methylene blue from being released

Examples

Experimental program
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Effect test

Embodiment 1

[0016] (1) Add absolute ethanol, ammonia water, methylene blue and ethyl orthosilicate to the aqueous solution with the concentration of methylene blue at 7.58 mg / mL in sequence, so that the volume of water, absolute ethanol, ammonia water and ethyl orthosilicate in the methylene blue solution The ratio is 13.2:92: 2.48:3.44, then stirred for 4 hours, centrifuged and washed the sediment twice with absolute ethanol, then washed twice with acetic acid buffer solution with pH = 3.6, and then redispersed the colloid in water, according to The amount of tetraethyl orthosilicate added calculates the theoretical amount of generation of silicon dioxide containing methylene blue, and the theoretical concentration of silicon dioxide particles containing methylene blue is prepared to be a colloidal aqueous solution of 8.37 mg per milliliter, wherein methylene blue is in the presence of methylene blue in the silicon dioxide containing methylene blue The content in silicon particles is 29.2...

Embodiment 2

[0022] (1) Add absolute ethanol, ammonia water, methylene blue and ethyl orthosilicate to the aqueous solution with the concentration of methylene blue at 7.58 mg / mL in sequence, so that the volume of water, absolute ethanol, ammonia water and ethyl orthosilicate in the methylene blue solution The ratio is 13.2:92: 2.48:3.44, then stirred for 4 hours, centrifuged and washed the sediment twice with absolute ethanol, then washed twice with acetic acid buffer solution with pH = 3.6, and then redispersed the colloid in water, according to The amount of tetraethyl orthosilicate added calculates the theoretical amount of generation of silicon dioxide containing methylene blue, and the theoretical concentration of silicon dioxide particles containing methylene blue is prepared to be a colloidal aqueous solution of 8.37 mg per milliliter, wherein methylene blue is in the presence of methylene blue in the silicon dioxide containing methylene blue The content in silicon particles is 29.2...

Embodiment 3

[0026] (1) Add absolute ethanol, ammonia water, methylene blue and ethyl orthosilicate to the aqueous solution with the concentration of methylene blue at 7.58 mg / mL in sequence, so that the volume of water, absolute ethanol, ammonia water and ethyl orthosilicate in the methylene blue solution The ratio is 13.2:92: 2.48:3.44, then stirred for 4 hours, centrifuged and washed the sediment twice with absolute ethanol, then washed twice with acetic acid buffer solution with pH = 3.6, and then redispersed the colloid in water, according to The amount of tetraethyl orthosilicate added calculates the theoretical amount of generation of silicon dioxide containing methylene blue, and the theoretical concentration of silicon dioxide particles containing methylene blue is prepared to be a colloidal aqueous solution of 8.37 mg per milliliter, wherein methylene blue is in the presence of methylene blue in the silicon dioxide containing methylene blue The content in silicon particles is 29.2...

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Abstract

The invention discloses a method for preparing methylene blue-containing silicon dioxide-coated particles that prevent methylene blue from being released, and belongs to the technical field of inorganic material preparation. It is characterized in that it includes the following steps: (1) In the aqueous solution containing methylene blue, add absolute ethanol, ammonia water and ethyl orthosilicate in sequence, stir and react for 4 hours, centrifuge and wash with absolute ethanol and acetic acid buffer solution with pH = 3.6 Prepare the colloidal aqueous solution of silica particles containing methylene blue after two times; (2) add ferric chloride solution, tannic acid solution, and phosphate with a pH value of 7.2 to 7.4 to the colloidal solution prepared in step (1) The buffer solution and polyethylene glycol were stirred for another 5 minutes; (3) the reaction solution prepared in step (2) was centrifuged, and the sediment was washed twice with absolute ethanol and deionized water and then dried to obtain the Silica-coated particles of methylene blue. The method has the advantages of simple process, low raw material price and easy industrial production, and the silica-wrapped particles have good environmental compatibility, and the methylene blue is almost no longer released from the silica adsorbent that adsorbs the methylene blue.

Description

technical field [0001] The invention discloses a method for preparing methylene blue-containing silicon dioxide-coated particles that prevent methylene blue from being released, and belongs to the technical field of inorganic material preparation. Background technique [0002] Methylene blue is one of the main pollution sources in printing and dyeing wastewater, and the development of its wastewater treatment technology is becoming increasingly urgent. Specific treatment techniques include adsorption, flocculation, and photocatalysis. The adsorption method is to adsorb methylene blue on the surface or inside of the adsorbent, and then separate the adsorbent from the water body. Adsorbents include bentonite, activated carbon, hydroxyapatite, and silica. After the adsorbent is collected, it is often stacked in the open air. If it encounters environmental conditions with high humidity such as rain or snowfall, methylene blue will be released again, which will cause serious se...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/30B01J20/26C02F1/28
CPCB01J20/103B01J20/261C02F1/285C02F2101/308C02F2101/38
Inventor 李成峰李杨王文浩史如静王维文葛筱璐
Owner SHANDONG UNIV OF TECH