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Preparation method of mesoporous silica solidified laccase printing and dyeing wastewater decolorizer

A technology for mesoporous silica and printing and dyeing wastewater, which is applied in chemical instruments and methods, textile industry wastewater treatment, and other chemical processes, and can solve problems such as long storage time, desorption, and insufficient stability of synthetic inorganic decolorizers

Inactive Publication Date: 2015-12-16
高大元
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem mainly solved by the present invention: Aiming at the problem that the synthetic inorganic decolorizing agent used in the decolorization process of printing and dyeing wastewater is not stable enough, and it is left for too long to cause desorption, a nanometer silicon dioxide and hexadecyltrimethylammonium bromide are provided The reaction is carried out, and the concentrated hydrochloric acid and absolute ethanol are repeatedly mixed and refluxed to prepare mesoporous nano-silica particles. Under the action of shaking table oscillation and ultrasonic internal auxiliary oscillation, laccase powder is initially loaded on nano-mesoporous silica At the same time, the mesoporous silica and laccase fixation solution are stirred by magnetic force, so that the laccase is firmly loaded, and the stability and decolorization effect of the synthetic inorganic decolorizing agent are improved.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0018] In terms of mass percentage, 2% mass fraction is selected to be 25% ammonia water, 15.5% ethylene glycol, 0.5% cetyltrimethylammonium bromide, 41% deionized water and 41% nano silicon dioxide , at a temperature of 45°C, stir and mix to fully dissolve the material, then raise the temperature to 55°C, stir and react at 600r / min for 2h, and prepare a nano-silica mixed solution; in parts by weight, select 5 parts of nano-silica Silica mixed solution, 15 parts of concentrated hydrochloric acid with a mass fraction of 98% and 80 parts of absolute ethanol, stirred and mixed evenly and refluxed at 80°C for 2h, then stopped heating and cooled naturally to room temperature, then placed it at 12000r / min in a centrifuge for 10 min, remove the precipitate from the lower layer and wash it with absolute ethanol for 3 times, then place it in an oven at 60°C and dry it for 2 h to prepare mesoporous nano-silica particles for later use; by mass fraction, Weigh 2 parts of sodium dihydroge...

example 2

[0020]In terms of mass percentage, the mass fraction of 5% is 25% ammonia water, 14.5% ethylene glycol, 0.5% cetyltrimethylammonium bromide, 40% deionized water and 40% nano silicon dioxide , at a temperature of 47°C, stir and mix to fully dissolve the material, then raise the temperature to 57°C, stir and react at 700r / min for 2.5h, and prepare a nano-silica mixed solution; select 8 parts by weight Nano silicon dioxide mixed solution, 17 parts of concentrated hydrochloric acid with a mass fraction of 98% and 75 parts of absolute ethanol, stirred and mixed evenly and refluxed at 85°C for 3h, then stopped heating and naturally cooled to room temperature, then placed it at 12500r / min centrifuge for 13min, remove the lower precipitate and wash it with absolute ethanol for 4 times, then place it in a 62°C oven and dry it for 2.5h to prepare mesoporous nano-silica particles for later use; according to the mass fraction Calculated, weigh 5 parts of sodium dihydrogen phosphate, 8 pa...

example 3

[0022] In terms of mass percentage, the mass fraction of 8% is 25% ammonia water, 11.7% ethylene glycol, 0.3% cetyltrimethylammonium bromide, 40% deionized water and 40% nano silicon dioxide , at a temperature of 50°C, stir and mix to fully dissolve the material, then raise the temperature to 60°C, stir and react at 800r / min for 3h, and prepare a nano-silica mixed solution; in parts by weight, select 10 parts of nano-silica Silica mixed solution, 15 parts of concentrated hydrochloric acid with a mass fraction of 98% and 75 parts of absolute ethanol, stirred and mixed evenly and refluxed at 90°C for 4h, then stopped heating and cooled naturally to room temperature, then placed it at 13000r / min in a centrifuge for 15 min, remove the precipitate from the lower layer and wash it with absolute ethanol for 5 times, then place it in a 65°C oven and dry it for 3 h to prepare mesoporous nano-silica particles for later use; by mass fraction, Weigh 8 parts of sodium dihydrogen phosphate...

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Abstract

The invention relates to a preparation method of a mesoporous silica solidified laccase printing and dyeing wastewater decolorizer, and belongs to the field of wastewater decolorizing. The preparation method is used for solving the problems that the present combined inorganic decolorizer is not stable enough and is desorbed after the decolorizer is placed for a long time. The preparation method comprises the following steps: dissolving nanometer silica in 25% ammonium hydroxide, cetane trimethyl ammonium bromide and glycol; causing the silica solution to react with concentrated hydrochloric acid and absolute ethyl alcohol, thereby preparing nanometer mesoporous silica; presolidifying the laccase by shaking the laccase powder and the mesoporous silica grains through a shaker under ultrasonic assistance; and lastly, solidifying the presolidified mesoporous silica and the laccase fixing solution under the condition of magnetically stirring. The color removal rate of the printing and dyeing wastewater decolorizer solidifying laccase by utilizing mesoporous silica can reach 65-70%, the decolorizer is never desorbed after repeated use, and the compounded inorganic matter is used for preparing the decolorizer so that environmental protection and zero secondary pollution are ensured.

Description

technical field [0001] The invention relates to a preparation method of a decolorizing agent for printing and dyeing wastewater by using mesoporous silica to solidify laccase, and belongs to the field of wastewater decolorization. Background technique [0002] In recent years, with the improvement of people's living standards and the pursuit of beauty, the output and quality of textiles have greatly improved. [0003] The increase in the range, due to the frequent changes in processing varieties and production, leads to large changes in water temperature and water volume. With the development of chemical fiber fabrics and the advancement of printing and dyeing technology, printing and dyeing wastewater has high chroma, strong toxicity, large water volume, and poor biochemical properties, making its treatment more and more difficult, and the pollution of printing and dyeing wastewater to the environment is becoming more and more serious. The main cause of colored water is dy...

Claims

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Application Information

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IPC IPC(8): B01J20/22B01J20/30C02F3/34C02F3/02C02F103/30
CPCY02W10/10
Inventor 高大元高力群
Owner 高大元