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Activated carbon supported cobalt oxide catalyst and application of same in organic pollutant degradation

A technology of cobalt oxide and activated carbon is applied in the field of preparation of activated carbon-supported cobalt oxide catalyst, which can solve the problems of serious environmental pollution and difficult recovery of catalyst, and achieve the effects of high catalytic activity, good decolorization effect and mild reaction conditions.

Inactive Publication Date: 2012-07-18
WUHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the shortcomings of such reactions, such as difficult catalyst recovery and serious environmental pollution, heterogeneous reactions have gradually become a research hotspot.

Method used

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  • Activated carbon supported cobalt oxide catalyst and application of same in organic pollutant degradation
  • Activated carbon supported cobalt oxide catalyst and application of same in organic pollutant degradation
  • Activated carbon supported cobalt oxide catalyst and application of same in organic pollutant degradation

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Experimental program
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Effect test

Embodiment 1

[0025] Embodiment one: Preparation of catalyst with 10wt% cobalt (cobalt / activated carbon) and activation of persulfate for treatment of organic wastewater.

[0026] The method includes the following steps:

[0027] (1) After impregnating activated carbon with 10wt% nitric acid solution for 24h, filter and wash with deionized water until neutral;

[0028] (2) Immerse the activated carbon treated in step (1) with 10wt% sodium hydroxide solution for 24 hours, filter, wash with deionized water until neutral; put it in an oven, dry at 90-100°C, and set aside.

[0029] (3) Add 1 gram of activated carbon to 50 ml containing 1.697 10 -3 mol cobalt ion solution;

[0030] (4) Dipping the obtained solution at 30-50°C for 24 hours;

[0031] (5) The obtained solid was dried at 100° C. for 12 hours;

[0032] (6) The obtained sample loaded with metal salt was transferred into a tube furnace, heated to 300-500 °C in a nitrogen atmosphere, and calcined for 4-6 h, and the obtained prod...

Embodiment 2

[0034] Embodiment two: Preparation of catalyst with cobalt content of 1w% (cobalt / activated carbon) combined with ultraviolet light and persulfate to treat organic wastewater.

[0035] The method includes the following steps:

[0036] (1) After impregnating 300 mesh gac with 10wt% nitric acid solution for 24h, filter and wash with deionized water until neutral;

[0037] (2) Immerse the activated carbon treated in step (1) with 10wt% sodium hydroxide solution for 24 hours, filter, wash with deionized water until neutral; put it in an oven, dry at 90-100°C, and set aside.

[0038] (3) Add 1 gram of activated carbon to 50 ml containing 1.697 10 -4 mol cobalt ion solution;

[0039] (4) Dipping the obtained solution at 30-50°C for 24 hours;

[0040] (5) The obtained solid was dried at 120° C. for 12 hours;

[0041] (6) The obtained sample loaded with metal salt was moved into a tube furnace, heated to 300-500°C under a nitrogen atmosphere, calcined for 4-6 hours, and the o...

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Abstract

The invention discloses an activated carbon supported cobalt oxide catalyst and application of the same in organic pollutant degradation. The weight ratio of cobalt element to activated carbon is 0.5-10%. When the activated carbon supported cobalt oxide catalyst and persulfate are used for treating organic wastewater containing azo dyestuffs orange II taken as a target pollutant, under the radiation of ultraviolet light, the decolorization rate reaches 86.0% within 30 minutes and 95.8% within 60 minutes, and the COD (chemical oxygen demand) removal rate reaches 38.5%, the cost is low and the treating effect is good. The activated carbon supported cobalt oxide catalyst disclosed by the invention has the advantages of high catalysis efficiency and low metal ion dissolution.

Description

technical field [0001] The invention relates to the preparation of an activated carbon-supported cobalt oxide catalyst, which is suitable for treating organic pollutants in waste water in combination with persulfate and ultraviolet radiation. Background technique [0002] Printing and dyeing wastewater is a typical type of refractory organic wastewater. This type of wastewater has large chroma, complex components, and high chemical oxygen consumption. It is difficult for general microorganisms to degrade it. Traditional treatment methods can no longer achieve satisfactory results, which is the difficulty of wastewater treatment at present. [0003] The traditional advanced oxidation technology is to use · OH is the main active substance to degrade pollutants. Commonly used advanced oxidation methods include: Fenton method, Fenton-like method, electrochemical oxidation method, catalytic wet oxidation method, photocatalytic oxidation method, etc. Persulfate advanced oxidati...

Claims

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Application Information

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IPC IPC(8): B01J23/75C02F1/32C02F1/72
Inventor 张晖高洪王莉果张道斌
Owner WUHAN UNIV
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