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Method for degrading methyl orange and methylene blue through synergistic light

A technology for methylene blue and methylene blue dyes, applied in the field of synergistic photodegradation of methyl orange and methylene blue, can solve the problems of high dye removal cost and poor removal effect, achieve a wide effective concentration treatment range, reduce treatment costs, and avoid solid-liquid The effect of separation and photocatalyst recycling

Inactive Publication Date: 2020-07-10
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of this, the present invention aims to propose a method for synergistic photodegradation of methyl orange and methylene blue to solve the problems of high dye removal cost and poor removal effect in existing wastewater

Method used

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  • Method for degrading methyl orange and methylene blue through synergistic light
  • Method for degrading methyl orange and methylene blue through synergistic light
  • Method for degrading methyl orange and methylene blue through synergistic light

Examples

Experimental program
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Effect test

Embodiment 1

[0025] This embodiment simulates the concentration adjustment state of methyl orange and methylene blue in the dye wastewater by preparing a methyl orange-methylene blue mixed solution. In this embodiment, the concentration of methyl orange in the methyl orange-methylene blue mixed solution is 20mg / L. The concentration of methylene blue is 1 mg / L, adjust the pH of the methyl orange-methylene blue mixed solution to 9, then transfer the methyl orange-methylene blue mixed solution to a magnetic stirrer for magnetic stirring, the stirring speed is 350r / min, and finally, Use a 300W xenon lamp to irradiate the mixed solution of methyl orange-methylene blue, the wavelength range is between 380nm and 780nm, and the light intensity is 1000mW / cm 2 , the light radiation time is 60min.

[0026] Carry out electron paramagnetic resonance test and ion chromatographic analysis to the photodegradation process of present embodiment methyl orange-methylene blue mixed solution, test result is as ...

Embodiment 2

[0033] This embodiment simulates the concentration adjustment state of methyl orange and methylene blue in the dye wastewater by preparing a methyl orange-methylene blue mixed solution. In this embodiment, the concentration of methyl orange in the methyl orange-methylene blue mixed solution is 20mg / L. The concentration of methylene blue is 5mg / L, adjust the pH of methyl orange-methylene blue mixed solution to 7, then, transfer methyl orange-methylene blue mixed solution to magnetic stirrer and carry out magnetic stirring, stirring speed is 350r / min, finally, Use a 300W xenon lamp to irradiate the mixed solution of methyl orange-methylene blue, the wavelength range is between 380nm and 780nm, and the light intensity is 1500mW / cm 2 , the light radiation time is 60min.

[0034] The photodegradation effect of the methyl orange-methylene blue mixed solution of this embodiment was tested.

[0035] It can be seen through testing that the degradation rates of methyl orange and methyl...

Embodiment 3

[0037] This embodiment simulates the concentration adjustment state of methyl orange and methylene blue in the dye wastewater by preparing a methyl orange-methylene blue mixed solution. In this embodiment, the concentration of methyl orange in the methyl orange-methylene blue mixed solution is 40mg / L. The concentration of methylene blue is 10mg / L, adjust the pH of the methyl orange-methylene blue mixed solution to 5, then transfer the methyl orange-methylene blue mixed solution to a magnetic stirrer for magnetic stirring, the stirring speed is 400r / min, and finally, Use a 300W xenon lamp to irradiate the mixed solution of methyl orange-methylene blue, the wavelength range is between 380nm and 780nm, and the light intensity is 1500mW / cm 2 , the light radiation time is 60min.

[0038] The photodegradation effect of the methyl orange-methylene blue mixed solution of this embodiment was tested.

[0039] It can be seen through testing that the degradation rates of methyl orange an...

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Abstract

The invention provides a method for degrading methyl orange and methylene blue through synergistic light. The method comprises the following steps: adjusting the concentrations of methyl orange and methylene blue in dye wastewater which is dye wastewater containing methyl orange and methylene blue, then adjusting the pH value of the dye wastewater to 3-11, and carrying out illumination radiation on the dye wastewater under stirring. According to the method, singlet oxygen with strong oxidizing property can be generated through methylene blue sensitization under the condition of illumination radiation only, efficient synchronous degradation of methyl orange and methylene blue in the water body is realized, and the effective treatment concentration range is relatively wide. Meanwhile, no photocatalyst is added in the process of degrading methyl orange and methylene blue, so that the problems of subsequent solid-liquid separation and photocatalyst cyclic regeneration can be effectively avoided, and the treatment cost of wastewater containing methyl orange and methylene blue is remarkably reduced.

Description

technical field [0001] The invention relates to the technical field of water treatment, in particular to a method for synergistic photodegradation of methyl orange and methylene blue. Background technique [0002] According to statistics, the production of dyestuffs in my country is about 900,000 tons per year, but about 20% of the dyestuffs are directly discharged into water bodies without proper treatment in the process of preparation, finishing and use, thus causing serious damage to the ecological environment. serious harm. Methyl orange and methylene blue, as typical anionic and cationic dyes, usually exist in the wastewater discharged from the textile, leather and printing and dyeing industries. Due to its high chroma, high biological toxicity and difficulty in being biodegradable, the dye wastewater containing methyl orange and methylene blue will not only inhibit the photosynthesis of aquatic plants, but also cause direct poisoning to aquatic organisms, thus seriousl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/30C02F1/72C02F101/30
CPCC02F1/30C02F1/725C02F2101/308
Inventor 赵云良陈鹏宋少先康石长张婷婷
Owner WUHAN UNIV OF TECH
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