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Method for treating printing and dyeing wastewater through catalytic oxidation

A technology for printing and dyeing wastewater and catalytic oxidation, which is used in oxidized water/sewage treatment, textile industry wastewater treatment, etc., can solve the problems of weak oxidation ability, poor mineralization effect, slow oxidation speed, etc., and achieve easy separation and reduce oxidation and decolorization. Cost, fast response rate

Inactive Publication Date: 2015-07-08
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the decolorization of dyes, peroxides such as hydrogen peroxide are often used as oxidizing agents, but when used alone, the oxidation ability is weak, the oxidation speed is slow, and the mineralization effect is not good

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Add 5g / L cobalt phosphate Co to 40ml of dyeing wastewater containing reactive brilliant blue KN-19 3 (PO 4 ) 2 , then add 10ml of 5.0% hydrogen peroxide and stir for 40 minutes. After the decolorization reaction is completed, let it settle for 40 minutes, and the decolorization rate of the dyeing solution is over 90%.

Embodiment 2

[0022] Add 10ml of 0.5% hydrogen peroxide to 40ml of methyl orange-containing printing and dyeing wastewater, and then add 25g / L of cobalt phosphate Co 3 (PO 4 ) 2 , Stir for 50 minutes, after the decolorization reaction is completed, let it settle for 40 minutes, and the decolorization rate of the dye solution is over 90%.

Embodiment 3

[0024] In 40ml of printing and dyeing wastewater containing Rhodamine B, add 10ml of 10.0% aqueous solution of potassium persulfate, and then add 9g / L of cobalt phosphate Co 3 (PO 4 ) 2 , Stir for 30 minutes, after the decolorization reaction is completed, let it settle for 30 minutes, and the decolorization rate of the dyeing solution is over 85%.

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PUM

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Abstract

The invention relates to a method for treating printing and dyeing wastewater through catalytic oxidation. The method comprises the following steps: adding Co3(PO4)2 and an oxidant into the printing and dyeing wastewater respectively, mixing, and then performing the static settlement or sedimentation to obtain the treated printing and dyeing wastewater. The Co3(PO4)2 is an effective and quick oxidation catalyst, can quickly catalyze peroxide to generate a free radical with a strong oxidizing property, and is enabled to be in oxidation-reduction reaction with dye to achieve the purpose of high reaction speed and high decolourization ratio. The treatment of the printing and dyeing wastewater can be carried out under the natural condition, without illumination.

Description

technical field [0001] The invention belongs to the field of wastewater treatment methods, in particular to a method for catalytic oxidation treatment of printing and dyeing wastewater. Background technique [0002] With the development of the dye industry, the environmental pollution problems it brings are becoming increasingly prominent. Printing and dyeing wastewater is one of the main sources of environmental pollution, with large discharge, high chroma, and poor degradability. [0003] Another characteristic of printing and dyeing wastewater is high chroma, some of which can be as high as 4000 times. Therefore, one of the important tasks in the treatment of dye-containing wastewater is to carry out decolorization treatment. For this reason, it is necessary to study and select a treatment process that is beneficial to decolorization. Among them, the oxidation decolorization method is to destroy the conjugated structure or chromophoric group of the dye by means of redox ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/72C02F103/30
Inventor 邢彦军胡晓霞
Owner DONGHUA UNIV
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