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High-efficiency treatment method of methylene blue dye wastewater

A technology of methylene blue dye and treatment method, which is applied in the field of efficient treatment of methylene blue dye wastewater, can solve the problems of strong hydrophilicity, difficult treatment, complex components, etc., achieve good catalytic effect, save wastewater treatment cost, and use less Effect

Inactive Publication Date: 2017-05-17
DONGGUAN LIANZHOU INTPROP OPERATION MANAGEMENT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Printing and dyeing wastewater is organic wastewater containing a certain amount of toxic substances. It has complex components, high chroma, and is difficult to biodegrade. Therefore, it is difficult to treat. How to decolorize printing and dyeing wastewater is an important problem in the treatment. Important Issues in Wastewater
Among them, disperse dyes, vat dyes, sulfur dyes, ice dyes and some water-soluble dye wastewater with large molecular weight can be decolorized by coagulation method, and the effect is better, but for water-soluble dyes with small molecular weight, such as acidic, reactive Such as dye wastewater, because of its strong hydrophilicity, it is difficult to separate directly from the wastewater

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] An efficient treatment method for methylene blue dye wastewater, including the following steps:

[0031] (1) Disperse nanometer titanium dioxide in deionized water, and ultrasonically treat it at 300W for 20min to obtain a uniform nanometer titanium dioxide dispersion;

[0032] (2) Add a 0.01 mol / L silver nitrate solution to the nano titanium dioxide dispersion prepared in step (1), and stir uniformly to obtain solution A;

[0033] (3) Add 0.01mol / L sodium dihydrogen phosphate solution dropwise to solution A and stir evenly, then continue to add 0.01mol / L sodium iodide solution, after stirring evenly, AgI / Ag is obtained 3 PO 4 / TiO 2 The composite solution, stand, centrifuge, wash the precipitate with water, and then dry at 110 ℃ for 20 hours, dry to obtain AgI / Ag 3 PO 4 / TiO 2 Composite catalyst; wherein the AgI / Ag 3 PO 4 / TiO 2 The content of each component in the composite catalyst is: AgI 1.75wt%; Ag 3 PO 4 :58.54wt%; TiO 2 : 39.71wt%;

[0034] (4) Put the red mud in a cruci...

Embodiment 2

[0037] An efficient treatment method for methylene blue dye wastewater includes the following steps:

[0038] (1) Disperse nano-titanium dioxide in deionized water, and ultrasonically treat it at 400W power for 30 minutes to obtain a uniform nano-titanium dioxide dispersion;

[0039] (2) Add a 0.1 mol / L silver nitrate solution to the nano titanium dioxide dispersion prepared in step (1), and stir evenly to obtain solution A;

[0040] (3) Add 0.1 mol / L sodium dihydrogen phosphate solution dropwise to solution A and stir well, then continue to add 0.05 mol / L sodium iodide solution, and after stirring evenly, AgI / Ag is obtained 3 PO 4 / TiO 2 The composite solution, stand, centrifuge, wash the precipitate with water, then dry at 130 ℃ for 18h, dry to obtain AgI / Ag 3 PO 4 / TiO 2 Composite catalyst; wherein the AgI / Ag 3 PO 4 / TiO 2 The content of each component in the composite catalyst is: AgI 8.8wt%; Ag 3 PO 4 :63.5wt%; TiO 2 : 27.7wt%;

[0041] (4) Put the red mud in a crucible, microwave...

Embodiment 3

[0044] An efficient treatment method for methylene blue dye wastewater includes the following steps:

[0045] (1) Disperse nanometer titanium dioxide in deionized water, and ultrasonically treat it at 450W power for 35 minutes to obtain a uniform nanometer titanium dioxide dispersion;

[0046] (2) Add 0.3 mol / L silver nitrate solution to the nano titanium dioxide dispersion prepared in step (1), and stir evenly to obtain solution A;

[0047] (3) Add 0.15 mol / L sodium dihydrogen phosphate solution dropwise to solution A and stir evenly, then continue to add 0.1 mol / L sodium iodide solution, after stirring evenly, AgI / Ag is obtained 3 PO 4 / TiO 2 The composite solution, let stand, centrifuge, wash the precipitate with water, then dry at 140℃ for 16h, and dry to obtain AgI / Ag 3 PO 4 / TiO 2 Composite catalyst; wherein the AgI / Ag 3 PO 4 / TiO 2 The content of each component in the composite catalyst is: AgI 10.9wt%; Ag 3 PO 4 :71.3wt%; TiO 2 :17.8wt%;

[0048] (4) Put the red mud in a crucib...

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PUM

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Abstract

The invention discloses a high-efficiency treatment method of methylene blue dye wastewater, comprising the following steps: firstly preparing an AgI / Ag3PO4 / TiO2 composite catalyst; then carrying out microwave treatment and citric acid modification on red mud to obtain modified red mud; and finally carrying out absorption treatment on the methylene blue dye wastewater with the modified red mud, and then adding H2O2 to treat the wastewater under the catalysis of the prepared AgI / Ag3PO4 / TiO2 composite catalyst. The method can effectively remove pollutants from the dye wastewater and has simple operation and low cost.

Description

[0001] Technical field: [0002] The invention relates to the field of wastewater treatment, in particular to an efficient treatment method for methylene blue dye wastewater. [0003] Background technique: [0004] Dyes are closely related to people's lives, but the production and use of dyes also bring serious pollution to the environment. As far as the printing and dyeing industry is concerned, there are data showing that about 600-700 million tons of printing and dyeing wastewater are discharged every year in my country. Printing and dyeing wastewater belongs to organic wastewater containing a certain amount of toxic substances. Its composition is complex, high in color, and difficult to biodegrade. Therefore, it is difficult to treat. How to decolorize printing and dyeing wastewater is an important issue in treatment. Therefore, the study of decolorization methods has become the treatment of printing and dyeing An important subject of wastewater. Among them, disperse dyes, vat ...

Claims

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Application Information

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IPC IPC(8): B01J27/18B01J20/10B01J20/30C02F1/28C02F1/72C02F101/30
CPCB01J20/103C02F1/281C02F1/722C02F1/725B01J27/1817C02F2101/308B01J27/08B01J21/063B01J35/19
Inventor 李风浪
Owner DONGGUAN LIANZHOU INTPROP OPERATION MANAGEMENT CO LTD
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