Method for utilizing nitrate ions to degrade and decolorize dye

A nitrate ion and dye technology, applied in chemical instruments and methods, water pollutants, water treatment of special compounds, etc., can solve problems such as secondary pollution and unsatisfactory treatment, and achieve fast degradation speed, low cost, and reaction conditions. mild effect

Inactive Publication Date: 2018-06-12
BENGBU COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these methods are unsatisfactory and easily cause secondary pollution.

Method used

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  • Method for utilizing nitrate ions to degrade and decolorize dye
  • Method for utilizing nitrate ions to degrade and decolorize dye
  • Method for utilizing nitrate ions to degrade and decolorize dye

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A method utilizing nitrate ion to decolorize dyestuffs, comprising the following steps:

[0027] (1) Sodium nitrate is added in the solution dyed by azo dye methyl red, and the initial concentration of methyl red is 10mg / L, so that the nitrate ion concentration in the solution is 4g / L;

[0028] (2) Place the solution obtained in step (1) in a beaker with an opening diameter of 12 cm and constantly stir it with a magnet. A medium-pressure mercury lamp is placed directly above the opening of the beaker as an ultraviolet light source. The surface height is 11cm, the power of the medium pressure mercury lamp is 375W, the characteristic wavelength is 365nm, and the irradiance is 18300μW / cm 2 , and control the reaction temperature of the solution to be 20°C.

Embodiment 2

[0030] A method utilizing nitrate ion to decolorize dyestuffs, comprising the following steps:

[0031] (1) adding sodium nitrate to the solution dyed by the heterocyclic dye saffron red T, the initial concentration of saffron red T is 10 mg / L, so that the nitrate ion concentration in the solution is 4 g / L;

[0032] (2) Place the solution obtained in step (1) in a beaker with an opening diameter of 12 cm and constantly stir it with a magnet. A medium-pressure mercury lamp is placed directly above the opening of the beaker as an ultraviolet light source. The surface height is 11cm, the power of the medium pressure mercury lamp is 375W, the characteristic wavelength is 365nm, and the irradiance is 18300μW / cm 2 , and control the reaction temperature of the solution to be 20°C.

Embodiment 3

[0034] A method utilizing nitrate ion to decolorize dyestuffs, comprising the following steps:

[0035] (1) Sodium nitrate is added in the solution dyed by quinone dye methylene blue, and the initial concentration of methylene blue is 10mg / L, so that the nitrate ion concentration in the solution is 0.01g / L;

[0036] (2) Place the solution obtained in step (1) in a beaker with an opening diameter of 12 cm and continuously stir it with a magnet. Place a xenon lamp directly above the opening of the beaker as an ultraviolet light source. The distance between the xenon lamp and the liquid level in the beaker is 11 cm. , xenon lamp power is 500W, irradiance is 18300μW / cm 2 , and control the reaction temperature of the solution to be 15°C.

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PUM

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Abstract

A method for utilizing nitrate ions to degrade and decolorize dye is characterized by comprising the following steps that (1), nitrate is added into a solution colored by dye, and the concentration ofthe nitrate ions in the solution is made to be 0.01-15g / L; and (2), the solution where the nitrate ions are added in the step (1) is placed in a sunlight or ultraviolet environment with the irradiance being 18300 microwatt / cm<2> to be continuously irradiated. According to the method, high-concentration dye can be effectively degraded only by the nitrate ions under irradiation of sunlight or ultraviolet. The method has the characteristics of being wide in raw material, high in degradation speed, low in cost, gentle in reaction condition, simple in post-treatment, convenient to operate and thelike.

Description

technical field [0001] The invention relates to a method for degrading and fading dyes by using nitrate ions. Background technique [0002] Dyes are widely used in cosmetics, food, photography, pigments, textiles, printing, leather and garment factories, etc. While dyes bring people a better life and convenience, they also cause serious environmental pollution problems. According to statistics, in the production process of textile printing and dyeing factories, about 10-15% of dyes are discharged as sewage. Compared with other pollutant wastewater, as long as there is a trace amount of dye in the wastewater, the color will be clearly visible and significantly affect the water quality. These sewage are toxic and not biodegradable, and are very resistant to physical and chemical treatment methods, especially the difficulty in degrading high-concentration dye wastewater. Therefore, it is necessary to find a simple, fast and effective treatment of dye wastewater. new technolog...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/30C02F1/32C02F1/72C02F101/30
CPCC02F1/30C02F1/32C02F1/725C02F2101/308C02F2305/023C02F2305/10
Inventor 刘伟胡文娜吴凡
Owner BENGBU COLLEGE
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