Method for synergistically degrading methyl red dye in wastewater by ozone and calcium peroxide

A methyl red dye, calcium peroxide technology, applied in chemical instruments and methods, oxidized water/sewage treatment, water pollutants, etc., can solve the problems of high pollutant treatment costs, complex wastewater components, and difficult to break structures, etc. To achieve the effect of good treatment effect, wide application range of reaction conditions and low cost

Inactive Publication Date: 2019-03-26
DONGHUA UNIV
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  • Application Information

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Problems solved by technology

[0009] The problem to be solved by the present invention is: the wastewater containing methyl red dye has complex components, difficult to break structure, and poor biodegradability. The methyl red dye can be removed by photochemical degradation, high-voltage discharge degradation process or chemical degradation method. Disadvantages of red dye, such as high cost of pollutant treatment, long treatment time, and low income

Method used

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  • Method for synergistically degrading methyl red dye in wastewater by ozone and calcium peroxide
  • Method for synergistically degrading methyl red dye in wastewater by ozone and calcium peroxide
  • Method for synergistically degrading methyl red dye in wastewater by ozone and calcium peroxide

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Effect test

Embodiment 1

[0025] A method of ozone-calcium peroxide synergistic degradation of methyl red dye in wastewater:

[0026] Configure multiple groups of 5mg / L methyl red solutions, the initial pH value is 6.2, pass into the ozone (air source) of 48L / h in the system, and add different amounts of calcium peroxide (0mmol / h) respectively in the system at the same time L, 0.1mmol / L, 0.7mmol / L, 1.4mmol / L, 4.2mmol / L, 6.9mmol / L, 9.7mmol / L, 13.9mmol / L, 27.8mmol / L, 41.7mmol / L), stirring, React for 0.5-20 minutes.

[0027] Under the condition of different amounts of calcium peroxide added, the rate constant of methyl red decolorization reaction within 10 minutes is shown in figure 1 . The decolorization rate of methyl red showed a trend of first increasing and then decreasing with the increase of calcium peroxide addition. Under the condition that the dosage of calcium peroxide is 6.9mmol / L and ozone is passed through, the combination of ozone and calcium peroxide has the best effect on the treatment...

Embodiment 2

[0029] A method of ozone-calcium peroxide synergistic degradation of methyl red dye in wastewater:

[0030] Take distilled water, tap water, groundwater, surface water and the effluent of the secondary sedimentation tank of sewage treatment plant respectively as different background water substrates to configure multiple groups of 5mg / L methyl red solutions, and feed 48L / h of ozone (air Gas source), and simultaneously treated with 6.9mmol / L calcium peroxide, reacted for 0.5-25 minutes, the removal rate of the target substance is shown in figure 2 .

[0031] The combination of ozone and calcium peroxide is suitable for removing methyl red in various complex water matrices, and the removal rate of methyl red can reach more than 92% after 25 minutes of reaction.

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Abstract

The invention discloses a method for synergistically degrading methyl red dye in wastewater by ozone and calcium peroxide. The method is characterized in that ozone is introduced into the wastewater containing the methyl red dye; the calcium peroxide is fed and added; after full stirring, the methyl red in the wastewater can be removed. The operation is simple; the reaction conditions are mild; the treatment time is short; the method is applicable to various complicated water substrates. Compared with a traditional oxidation technology, the method has the advantages of stable oxidation effect,high degradation efficiency, low chemical and operation maintenance cost, great industrial application prospects and the like.

Description

technical field [0001] The invention relates to a method for treating methyl red dye wastewater by combining ozone and calcium peroxide, and belongs to the technical field of environmental pollution treatment. Background technique [0002] The textile printing and dyeing industry is one of the important traditional industries in my country. With the development of the printing and dyeing industry, the water consumption and drainage of textile printing and dyeing have increased significantly, and the pollution of printing and dyeing wastewater has become increasingly serious. Textile printing and dyeing wastewater has a large amount of discharge and complex composition. It contains a large number of dyes and compounds with complex structures. The pollutant concentration is high, the toxicity is strong, it is difficult to degrade, and the treatment is relatively difficult. [0003] High chroma is one of the main characteristics of printing and dyeing wastewater, especially azo...

Claims

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Application Information

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IPC IPC(8): C02F1/78C02F1/72C02F103/30C02F101/38C02F101/30
CPCC02F1/722C02F1/78C02F2101/308C02F2101/38C02F2103/30C02F2305/02
Inventor 张艾郝思宇刘亚男李响罗安然黄柯靓张晗沈雪战佳勋高小婷王慈浩李振宇沈玉叶赵静怡
Owner DONGHUA UNIV
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