Method for degrading organic dye wastewater through graphene electrode and photoelectric Feton cooperatively

A technology for organic dyes and wastewater, applied in chemical instruments and methods, energy wastewater treatment, light water/sewage treatment, etc., can solve the problems of poor degradation effect of dye wastewater, achieve improved mineralization, easy control of conditions, and simple operation Effect

Inactive Publication Date: 2016-10-12
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the technical problem of the poor degradation effect of dye wastewater in the above-mentioned prior art, the present invention proposes a method for synergistically degrading organic dye wastewater with a graphene

Method used

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  • Method for degrading organic dye wastewater through graphene electrode and photoelectric Feton cooperatively
  • Method for degrading organic dye wastewater through graphene electrode and photoelectric Feton cooperatively
  • Method for degrading organic dye wastewater through graphene electrode and photoelectric Feton cooperatively

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Embodiment 1

[0029] The present invention, the method for degrading organic dye wastewater, specifically comprises the following steps:

[0030] First prepare graphite composite electrode, weigh 10g of graphite, add 2 drops of "OP" emulsifier, 3mL of absolute ethanol and 1.0g of polytetrafluoroethylene, ultrasonically disperse evenly until the mixture forms a cohesive paste, then roll the paste A film with a thickness of 2 mm is attached to a stainless steel mesh, pressed under a pressure of 30 MPa to obtain an electrode, soaked in acetone solution for 2 hours to remove residual ethanol and "OP" emulsifier on the surface of the electrode; heat at 80°C for 2 hours in an infrared box, and it is ready. Graphite electrode, its final size: bottom area × height = 1.0cm 2 ×5mm;

[0031] Secondly, the prepared graphite composite electrode is used as the cathode, and the iron sheet is used as the anode, and the Rhodamine B dye wastewater is thrown into the electrolytic cell. The dosage of the Rhod...

Embodiment 2

[0035] The present invention, the method for degrading organic dye wastewater, specifically comprises the following steps:

[0036] To prepare a graphene composite electrode, weigh 8g of graphene, add 1 drop of "OP" emulsifier, 2mL of absolute ethanol, and 1.0g of polytetrafluoroethylene, and disperse evenly with ultrasound until the mixture forms a cohesive paste. Press it into a film of about 2mm, attach it to a stainless steel mesh, press it under a pressure of 20MPa to obtain an electrode, soak it in acetone solution for 2 hours to remove the residual ethanol and "OP" emulsifier on the surface of the electrode; keep it in an infrared box at 80°C for 2 hours, and the product is ready. Graphite electrode, its final size: bottom area × height = 1.0cm 2 ×5mm;

[0037] The prepared graphene electrode is the cathode, the iron sheet is the anode, the dosage of rhodamine B dye wastewater is 5g / L, and the applied voltage of the electric Fenton system is 4V; the sulfuric acid adjus...

Embodiment 3

[0040] The present invention, the method for degrading organic dye wastewater, specifically comprises the following steps:

[0041] Weigh 8.5g of graphene, add 1 drop of "OP" emulsifier, 2.5mL of absolute ethanol and 1.0g of polytetrafluoroethylene, ultrasonically disperse evenly until the mixture forms a cohesive paste, and roll the paste to about A 2mm membrane is attached to a stainless steel mesh, pressed under different pressures to obtain a graphene electrode, soaked in acetone solution for 2 hours to remove the residual ethanol and "OP" emulsifier on the electrode surface, and kept at 80°C for 2 hours in an infrared box to make graphite Electrode, its final size: bottom area × height = 1.0cm 2 ×5mm;

[0042] The prepared high-purity graphite electrode is used as the cathode, the iron sheet is used as the anode, the dosage of the methyl orange dye wastewater is 4g / L, and the applied voltage of the electric Fenton system is 4V; the sulfuric acid adjusts the pH to 3.0, an...

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Abstract

The invention discloses a method for synergistically degrading organic dye wastewater by a graphene electrode and a photoelectric Feton. Firstly, graphite and variable-valence metal oxides are mixed, and emulsifiers, absolute ethanol and polytetrafluoroethylene are sequentially added thereto, and ultrasonic action makes it Disperse evenly until it is mixed to form a cohesive paste; then roll the obtained paste into a film, attach it to a nickel mesh, press it into an electrode under a certain pressure, and remove the residue on the electrode surface; the soaked electrode The graphite composite electrode is placed in an infrared box and dried to obtain a graphite composite electrode; the graphite composite electrode is used as a cathode, and the iron sheet is used as an anode, and the lighting device is turned on to irradiate the electrolytic cell with sunlight to degrade the organic dye wastewater. The invention adds sunlight to the electro-Fenton reaction to form a photo-electric Fenton system, which is applied to the dye wastewater treatment practice, and the method improves the degradation ability of the dye wastewater.

Description

technical field [0001] The invention relates to the technical field of organic dye wastewater treatment, in particular to a method for synergistically degrading organic dye wastewater by a graphene electrode and a photoelectric Feton. Background technique [0002] Electro-Fenton advanced oxidation technology can be used to treat dye wastewater and various toxic organic pollutants. The hydroxyl radicals generated in the Fenton reaction have high activity and high oxidation potential, and can directly oxidize and mineralize organic matter to generate water, carbon dioxide and inorganic ions. The electro-Fenton system mainly produces H by electrocatalysis in the cathode area when electricity is applied. 2 o 2 , in solution with variable valence metal ions (such as Fe 3+ / Fe 2+ etc.) react to generate strong oxidant hydroxyl radicals (·OH), which have high activity and strong oxidation ability, and can effectively degrade and even mineralize organic and toxic pollutants. [...

Claims

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Application Information

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IPC IPC(8): C02F1/461C02F1/30C02F1/72C02F101/30
CPCY02W10/37C02F1/461C02F1/30C02F1/46109C02F1/722C02F2001/46133C02F2101/308C02F2305/026C02F2305/10
Inventor 程庆利刘栓陶彬张卫华刘全祯
Owner CHINA PETROLEUM & CHEM CORP
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