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A kind of preparation method of printing and dyeing wastewater rapid decolorizer

A printing and dyeing wastewater and decolorizing agent technology, applied in chemical instruments and methods, water pollutants, adsorbed water/sewage treatment, etc., can solve the problems of weak adsorption capacity, long adsorption time, limitations, etc., and achieve strong decolorization ability and long decolorization time The effect of short and large specific surface area

Inactive Publication Date: 2021-03-19
HEZE UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these adsorbents have limited their practical application due to their weak adsorption capacity or long adsorption time.

Method used

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  • A kind of preparation method of printing and dyeing wastewater rapid decolorizer
  • A kind of preparation method of printing and dyeing wastewater rapid decolorizer
  • A kind of preparation method of printing and dyeing wastewater rapid decolorizer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The preparation method of the printing and dyeing wastewater quick decolorizer of the present embodiment comprises the following steps:

[0027] (1) Weigh 2.35g of sodium silicate and dissolve it in 50ml of water, then add 3.0g of acetic acid and 0.3g of ammonium fluoride as hydrogenation medium;

[0028] (2) Weigh 3.0g p123 and dissolve it in the mixed solution of step (1), react at 40°C for 24 h under magnetic stirring, and then react at 70°C for 24 h;

[0029] (3) Centrifuge and wash the mixture in step (2), and then calcinate at 550°C for 5 hours;

[0030] (4) Weigh 0.05g of the sample in step (3) and add it to 30ml of metal salt (molar ratio: n(Mg(NO 3 ) 2 : n(Al(NO 3 ) 3 ):n(urea)=3:1:10) solution, stirred for 5min, then reacted at 120℃ for 48h. Centrifuge, wash, and dry to become a decolorizer.

[0031] (5) Weigh 0.025g of decolorizing agent and add it to 25ml of methylene blue solution (wt=0.01%), and carry out decolorization for 5min. The results show tha...

Embodiment 2

[0033] The preparation method of the printing and dyeing wastewater quick decolorizer of the present embodiment comprises the following steps:

[0034] (1) Weigh 2.35g of sodium silicate and dissolve it in 50ml of water, then add 3.0g of acetic acid and 0.3g of ammonium fluoride as hydrogenation medium;

[0035] (2) Weigh 3.0g p123 and dissolve it in the mixed solution of step (1), react under magnetic stirring at 40°C for 24h, then react at 70°C for 24h;

[0036] (3) Centrifuge and wash the mixture in step (2), and then calcinate at 550°C for 5 hours;

[0037] (4) Weigh 0.05g of the sample in step (3) and add it to 30ml of metal salt (molar ratio: n(Mg(NO 3 ) 2 : n(Al(NO 3 ) 3 ):n(urea)=3:1:10) solution, stirred for 5min, then reacted at 120℃ for 48h. Centrifuge, wash, and dry to become a decolorizer.

[0038] (5) Weigh 0.025g of decolorizing agent and add it to 25ml of rhodamine solution (wt=0.01%), and carry out decolorization for 5min. The results show that the solut...

Embodiment 3

[0040] (1) Weigh 2.35g of sodium silicate and dissolve it in 50ml of water, then add 3.0g of acetic acid and 0.3g of ammonium fluoride as hydrogenation medium;

[0041] (2) Weigh 3.0g p123 and dissolve it in the mixed solution of step (1), react under magnetic stirring at 40°C for 24h, then react at 70°C for 24h;

[0042] (3) Centrifuge and wash the mixture in step (2), and then calcinate at 550°C for 5 h;

[0043] (4) Weigh 0.05g of the sample in step (3) and add it to 30ml of metal salt (molar ratio: n(Mg(NO 3 )2 : n(Al(NO 3 ) 3 ):n(urea)=3:1:10) solution, stirred for 5min, then reacted at 120℃ for 48h. Centrifuge, wash, and dry to become a decolorizer.

[0044] (5) Weigh 0.025g of decolorizing agent and add it to 25ml of Coomassie Brilliant Blue solution (wt=0.01%), and carry out decolorization for 5min. The results show that the solution is clear and transparent after decolorization.

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Abstract

The invention discloses a preparation method of a quick discoloring agent for dyeing and printing wastewater, wherein the quick discoloring agent is prepared through a hydrothermal process with a polyethylene oxide-polypropylene oxide-polyethylene oxide triblock copolymer as a template agent, sodium silicate as a raw material and a layered double hydroxide as a main component. The quick discoloring agent has large specific surface area, excellent discoloring capability and short discoloring time, and can completely remove majority of dyes within a short time.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment, in particular to a preparation method of a fast decolorizing agent for printing and dyeing wastewater. Background technique [0002] Printing and dyeing wastewater mainly comes from desizing, bleaching, dyeing, printing and other processes. These production processes determine that printing and dyeing wastewater has a prominent feature - large chroma. Printing and dyeing wastewater is generally organic wastewater, and the colors contained in it mainly come from natural organic substances and synthetic organic substances. [0003] my country is the largest country in textile printing and dyeing, and the textile printing and dyeing industry is a large industrial wastewater discharge, accounting for about 35% of the entire industrial wastewater discharge. According to statistics, there are more than 30,000 kinds of dyes used for printing and dyeing, and the annual consumption is 7×10 ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/22B01J20/30C02F1/28C02F101/30C02F101/34C02F101/36C02F101/38
CPCB01J20/0251B01J20/04B01J20/22C02F1/28C02F2101/308C02F2101/34C02F2101/36C02F2101/38C02F2101/40
Inventor 张凤荣张作芳汪涛唐复明宋金梦
Owner HEZE UNIV
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