A kind of activated carbon particle electrode modified by quinone compound and its preparation method and application

Abstract

The invention discloses a quinone compound modified activated carbon particle electrode and a preparation method and application thereof and belongs to the technical field of environment engineering. The technical scheme includes that the quinone compound modified activated carbon particle electrode comprises, by weight, 20-30 parts of activated carbon powder and 1-3 parts of 1, 4-dihydroxyanthraquinone loaded on the surface of activated carbon. The preparation method includes: 1, weighing the 20-30 parts of activated carbon powder and the 1-3 parts of 1, 4-dihydroxyanthraquinone powder, and mixing well to obtain mixed powder; 2, adding an adhesive and a curing agent into the mixed powder, and stirring well to obtain mixed paste; 3, granulating and drying the mixed paste to obtain the quinone compound modified activated carbon particle electrode. The quinone compound modified activated carbon particle electrode and the preparation method and the application thereof have the advantages that a quinone compound does not shed, so that secondary pollution of treated water is avoided; the particle electrode has good catalytic effect on electrode biomembrane denitrification; the particle electrode is suitable for industrial production and popularization and application.

Description

technical field [0001] The invention belongs to the field of environmental engineering, and relates to an activated carbon particle electrode modified by a quinone compound and its preparation method and application, in particular to its application in accelerating denitrification of electrode biofilms. Background technique [0002] With the rapid development of industry and agriculture, the problem of groundwater pollution in my country has become increasingly serious, and nitrate has become one of the important pollutants in groundwater. Traditional nitrate wastewater treatment methods are mainly physical, chemical and biological. Among them, hydroautotrophic biological denitrification has been widely used due to its advantages of less residual sludge and no secondary pollution. [0003] In the denitrification of complex three-dimensional electrode biofilm with activated carbon as the filling medium, no external hydrogen is needed, and hydrogen autotrophs use the H produc...

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Problems solved by technology

[0003] In the denitrification of complex three-dimensional electrode biofilm with activated carbon as the filling medium, no external hydrogen is needed, and hydrogen autotrophs use the H produced by the electrolysis of water on the surface of the cathode 2 As an electron donor, reducing nitrate to N 2 , but the problem of low processing rate is the bottleneck restricting its development, so the modification of cathode and anode or activated carbon ion electrodes in the complex three-dimensional electrode system has become a hot research issue

[0004] The patent with the publication number CN 103663631 A discloses a three-dimensional particle electrode loaded with catalyst activated carbon and its preparation method. The electrode is composed of granular activated carbon and TiO doped with Sn and Sb elements loaded on the granular activated carbon. 2 Composed of solid solution composite catalysts, the hydroxyl radicals generated by the activated carbon loaded with catalysts under the action of an electric field can effectively treat organic wastewater that is difficult to biodegrade, but its preparation method is complicated, and there are many factors that affect the load, so its application is limited

The patent with the notification number CN 101538077 discloses an electrolytic activation method for a particle electrode used in a three-dimensional electrode reactor, that is, activated carbon that has been used for a period of time is diluted with H 2 SO 4 The solution is soaked and shaken, then loaded into a three-dimensional electrode reactor and activated by ultrapure water electrolysis, and the performance can be restored to the original level after activation. This method fills activated carbon between the two main electrodes and applies a DC electric field to the electrolyte. The electrochemical reaction produces strong oxidizing hydroxyl radicals, which degrade the pollutants adsorbed on the activated carbon, but this method requires regular activation of the particle electrode, so the practical applicability is poor

The patent with the publication number CN103193317 A discloses a method for strengthening denitrification by three-dimensional electrode biofilm. Activated carbon particles are used as particle electrodes, and sulfur particles are used as active plasmids. The volume ratio of the two is 5:1-10:1. Mix evenly and place between the cathode and anode. Doping with sulfur particles can prevent the short circuit of the activated carbon, so that the conductive ions are polarized under the action of an external electric field to form countless tiny particle electrodes, which improves the current efficiency and effectively improves the removal of nitrate nitrogen. rate, but the addition of sulfur particles can greatly increase the concentration of sulfate in the effluent, causing secondary pollution

[0005] It can be seen that the existing three-dimensional particle electrodes have problems such as low catalyst activity, easy loss, slow water treatment rate, poor effect, and poor applicability. Modified / modified activated carbon is mostly used in electrochemical systems, and has not been used in bio-electrochemical system

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