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A method of processing cationic dye wastewater based on electrochemical modification method

A cationic dye, electrochemical technology, applied in the field of organic wastewater treatment, achieves the effects of simple equipment, short treatment time and low energy consumption

Active Publication Date: 2021-06-22
WUHAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a novel new idea to solve the problem of dye wastewater treatment in view of the deficiencies in the above-mentioned prior art

Method used

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  • A method of processing cationic dye wastewater based on electrochemical modification method
  • A method of processing cationic dye wastewater based on electrochemical modification method

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Experimental program
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Effect test

Embodiment 1

[0037] A method for treating cationic dye wastewater based on an electrochemical modification method, the specific steps are as follows:

[0038] 1) Add 50mg of methylene blue to 1000mL of distilled water, the concentration of methylene blue is 0.0500g / L, as the simulated cationic dye wastewater;

[0039] 2) Add 1.0000g tetrabutylammonium chloride and 3.5000g sodium bicarbonate to the wastewater system described in step 1), stir and dissolve, and the concentration of tetrabutylammonium chloride in the simulated cationic dye wastewater system is 0.0036mol / L , the concentration of sodium bicarbonate is 0.0417mol / L, adding sulfuric acid to adjust the pH of the solution is 7.5, get 1.5ml of this solution and filter and measure its absorbance at the methylene blue maximum absorption wavelength place (664nm), which is 8.490A;

[0040] 3) In a 2000mL single-chamber electrolytic cell, add 1000mL of the solution prepared in step 2), 2 Platinum electrode as the anode of the electrolyti...

Embodiment 2

[0044] A method for treating cationic dye wastewater based on an electrochemical modification method, the specific steps are as follows:

[0045] 1) Add 100mg of methylene blue to 1000mL of distilled water, the concentration of methylene blue is 0.1000g / L, as the simulated cationic dye wastewater;

[0046] 2) Add 1.1600g tetrabutylammonium bromide and 3.5000g sodium citrate to the wastewater system described in step 1), stir and dissolve, and the concentration of tetrabutylammonium bromide in the simulated cationic dye wastewater system is 0.0035mol / L , the concentration of sodium citrate is 0.0135mol / L, adding sulfuric acid to adjust the pH of the solution is 6.5, get 1.5ml of this solution and filter and measure its absorbance at the methylene blue maximum absorption wavelength place (664nm), which is 15.18A;

[0047] 3) In a 2000mL single-chamber electrolytic cell, add 1000mL of the solution prepared in step 2), with an area of ​​40cm 2 The graphite sheet electrode is used...

Embodiment 3

[0051] A method for treating cationic dye wastewater based on an electrochemical modification method, the specific steps are as follows:

[0052] 1) Add 200mg of methylene blue to 1000mL of distilled water, the concentration of methylene blue is 0.2000g / L, as the simulated cationic dye wastewater;

[0053] 2) Add 2.0000g tetrabutylammonium iodide and 2.0000g ammonium dihydrogen phosphate to the wastewater system described in step 1), stir and dissolve, and the concentration of tetrabutylammonium iodide in the simulated cationic dye wastewater system is 0.0054mol / L, the concentration of ammonium dihydrogen phosphate is 0.0174mol / L, adding sodium hydroxide to adjust the pH of the solution is 8.5, get 1.5ml of this solution and filter and measure its absorbance at the methylene blue maximum absorption wavelength place (664nm), which is 29.00A;

[0054] 3) In a 2000mL single-chamber electrolytic cell, add 1000mL of the solution prepared in step 2), and 2 Graphite sheet electrode...

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Abstract

The invention relates to an efficient electrochemical method for treating cationic dye wastewater, belonging to the technical field of wastewater treatment. The core of the method lies in: using electrochemical methods to modify the cationic dye molecules to make them insoluble, and the modified dye molecules can be separated from the wastewater by simple filtration to realize wastewater treatment. the goal of. The new method of the invention has the characteristics of high removal efficiency, simple operation process, no secondary pollution, low operating cost, and friendliness to the environment and operators, and has high practical application value.

Description

technical field [0001] The invention belongs to the field of dye wastewater treatment, and in particular relates to a method for treating cationic dye wastewater based on an electrochemical method, which is suitable for the treatment of refractory organic wastewater in dye, industry, agriculture and other fields. Background technique [0002] As an important class of organic synthetic dyes, cationic dyes have been widely used in various fields such as textiles, biology, cosmetics, paints, rubber, plastics, insecticides, and wood preservatives. Because cationic dyes usually have high chroma, high COD and BOD values, and such dye molecules also have the characteristics of complex structure and refractory degradation, the wide application of cationic dyes in industry has led to the development of dyes containing cationic dyes. Wastewater seriously pollutes water bodies. my country's "Water Pollutant Discharge Standards for Textile Dyeing and Finishing Industry" (GB 4287-2012) ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/461C02F101/34C02F101/36C02F101/38C02F101/30
CPCC02F1/46104C02F2101/308C02F2101/345C02F2101/36C02F2101/38
Inventor 高晓芳王创剑杨红玲孙梦婷陈红祥高芳
Owner WUHAN UNIV OF SCI & TECH
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