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Preparation method of catalytic particles for device for composite catalytic oxidation treatment on organic wastewater

A technology for catalytic oxidation of organic wastewater, applied in chemical instruments and methods, chemical/physical processes, physical/chemical process catalysts, etc., can solve problems such as high operating costs, low ozone utilization rate, and poor complete mineralization ability. To achieve the effect of reducing operating costs

Inactive Publication Date: 2014-03-05
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, ozone oxidation is mainly based on direct oxidation, which has strong selectivity and can convert larger molecular organic matter into small molecular organic matter. Its complete mineralization ability is poor, and the utilization rate of ozone is not high, resulting in high operating costs and cannot be realized. Industrial-scale application, the oxidation characteristics of ozone determine that the single ozone oxidation technology has great limitations

Method used

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  • Preparation method of catalytic particles for device for composite catalytic oxidation treatment on organic wastewater
  • Preparation method of catalytic particles for device for composite catalytic oxidation treatment on organic wastewater
  • Preparation method of catalytic particles for device for composite catalytic oxidation treatment on organic wastewater

Examples

Experimental program
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Effect test

Embodiment 1

[0051] Ce, La, Ir doped Ti / SnO 2 -Sb electrode preparation:

[0052] The surface of the titanium metal plate substrate is sanded with abrasive cloth and pretreated with acid and alkali to remove the oil stain on the surface, and the surface is etched to increase the adhesion of the active coating on the titanium substrate. Take a certain amount of SnC1 with a molar ratio of Sn:Sb:Ir=100:10:24 ·5H 2 O, SbCl 3 , IrCl 3 ·3H 2 O metal salt mixture, add citric acid to it, its molar ratio to the sum of each metal is citric acid: the sum of each metal = 1:1, to obtain a solid mixture, add absolute ethanol and polyethylene glycol to the solid mixture (400), the volume addition of absolute ethanol is 8 to 12 times the volume addition of polyethylene glycol (400), the mass content of the metal salt in the mixed solution is 2 to 4%, and the mixed solution is magnetically stirred at 60°C After 3h, a uniform inner layer precursor mixed solution was obtained. Apply the prepared mixed ...

Embodiment 2

[0055] Preparation of particle electrodes: ①Carrier pretreatment, the ceramic particles were placed in 0.1mol / l hydrochloric acid and 0.1mol / l sodium hydroxide solution and boiled for 30min, then rinsed and soaked repeatedly to remove the impurities adsorbed on the surface, and washed Drain the carrier and dry it at 105°C for 10 hours; 3 ) 2 , Ce(NO 3 ) 3 and RuCl 3 The molar ratio is 100:10:1 to prepare the mixture, and then add absolute ethanol to the mixture to form a mixed solution. The mass content of the metal salt in the mixed solution is 5-10%, and then add 5% of the mixed solution to the mixed solution. % of 0.1mol / l hydrochloric acid solution to obtain the impregnation solution; ③ impregnation, the pretreated ceramic particles are placed in the impregnation solution, dynamically soaked on a shaker for 3 hours, and the particles are filtered out to impregnate the impregnated active components on the ceramic particles. ; ④ drying and roasting activation. The ceram...

Embodiment 3

[0057] The initial concentration of aniline wastewater is 2150mg / L, using three Ti / SnO 2 -Sb-Ir-Ce anode and three titanium plate cathodes are connected in parallel, the electrode spacing is 1.5cm, and ceramic particles / MnO are filled between the positive and negative electrodes 2 -Ce-Ru electrodes, solar photovoltaic cells to charge the battery, adjust the control system to output electrocatalytic initial voltage of 6V and ozone generator electrolytic working voltage of 5V, ozone flow rate of 20L / H, circulating wastewater flow rate of 200L / H, ozone recombination by electric field Catalytic oxidation treatment for 2 hours. The conversion rate of aniline was 99.6%, and the removal rate of COD was 86.4%.

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Abstract

The invention discloses a preparation method of catalytic particles for a device for composite catalytic oxidation treatment on organic wastewater. The method takes ceramic particles as carriers and comprises the steps of boiling the ceramic particles in 0.1mol / l hydrochloric acid and 0.1mol / l sodium hydroxide solution in turn for 30 minutes respectively; repeatedly flushing and soaking; draining the cleaned carriers, and drying at 105 DEG C for 10 hours; preparing a mixture from Mn(NO3)2, Ce(NO3)3 and RuCl3 at a molar ratio of 100:10:1; adding absolute ethyl alcohol into the mixture to obtain mixed liquid, wherein the content of metal salt in the mixed liquid is 5-10% by mass; adding 0.1mol / l hydrochloric acid solution accounting for 5% of the mixed liquid by volume to obtain impregnation liquid; putting the pretreated ceramic particles into the impregnation liquid, and dynamically soaking in a shaking table for 3 hours; filtering out the particles, and impregnating the ceramic particles with impregnation active components; drying and roasting for activation: drying the ceramic particles impregnated with the impregnation active components at 105 DEG C for 4 hours, and roasting for activation at 550 DGE C in a muffle for 3 hours; repeating the steps B3 and B4 for five times.

Description

[0001] The present invention is a preparation method of catalytic particles for a device for composite catalytic oxidation treatment of organic wastewater. " divisional application. technical field [0002] The invention relates to a device for treating organic wastewater by composite catalytic oxidation and a preparation method of a catalytic anode, belonging to the technical fields of solar energy utilization, electrocatalysis and ozone catalytic water treatment. It specifically relates to a device for compositely degrading organic waste water by solar power generation-electrocatalytic oxidation and ozone catalytic oxidation. Background technique [0003] With the rapid development of chemical, pharmaceutical and other industries, the refractory organic compounds in these industrial wastewaters have complex types, high toxicity, poor biodegradability, easy accumulation in organisms, and are prone to teratogenic, carcinogenic, and mutagenic effects on the human body. cause...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/656
Inventor 孙岳明徐海青李爱平齐齐蒋伟黄斌
Owner SOUTHEAST UNIV
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