Decolouring method of printing and dyeing waste water

A technology for printing and dyeing wastewater and wastewater, applied in chemical instruments and methods, water/sewage treatment, water/sewage multi-stage treatment, etc., can solve the problems of unreported oxidative degradation research, secondary pollution, high cost, and achieve good decolorization. Effect, no secondary pollution, low cost effect

Inactive Publication Date: 2003-07-16
PEKING UNIV
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Problems solved by technology

However, these methods generally have the disadvantages of high cost, short timeliness and secondary pollution.
[0003] At present, most of the researches on the degradation of printing and dyeing wastewater

Method used

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  • Decolouring method of printing and dyeing waste water
  • Decolouring method of printing and dyeing waste water

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Experimental program
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Embodiment Construction

[0030] 50ml of printing and dyeing wastewater of X-3B (a common industrial dye produced by Tianjin Xinxin Dye Factory) with an initial concentration of 20mg / l was placed in a 100ml Erlenmeyer flask, and its pH value was measured with HNO 3 and NaOH adjusted to 3. The natural manganese and potassium ore is collected from Xiangtan manganese ore, washed with tap water, naturally dried, crushed and sieved to obtain 160-200 mesh manganese and potassium ore, and the dosage is 0.2g. Put the Erlenmeyer flask into a constant temperature shaker in a water bath, shake at 200r / min for half an hour at 25°C, and the decolorization rate of X-3B is almost 100%.

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Abstract

A process for decoloring the dyeing and printing waste water includes such steps as regulating pH value to be come acidic, adding natural MnK ore particles, selectively adding dielectrolyte calcium nitrate and illuminating, and stirring while reacting for several hr. Its advantages are high effect, low cost, no secondary pollution, and cyclic use of the said MnK ore.

Description

Technical field: [0001] The invention belongs to the technical field of wastewater treatment, in particular to a decolorization method for printing and dyeing wastewater. Background technique: [0002] Today, the annual output of synthetic dyes in the world is about 1 million tons, of which my country accounts for about 20%. Most of the raw materials input into dye production are aromatic compounds and heterocyclic compounds, so that most of the wastewater discharged during the production process is organic matter with aromatic groups such as benzene, naphthalene, anthracene, and quinone as the parent, with chromogenic groups, The color is very dark, with a chroma of 500-500,000, and has a strong sense of pollution. If it is discharged directly, it will cause serious pollution to water sources. Therefore, it is of great significance to study the treatment of dye wastewater to protect the ecological environment and human health. At present, the commonly used dye wastewater ...

Claims

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Application Information

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IPC IPC(8): C02F1/30C02F1/58C02F1/66C02F9/04
Inventor 鲁安怀杨欣李改云高翔李巧荣王长秋
Owner PEKING UNIV
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