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Activated carbon loaded iron-cobalt oxide catalyst and application thereof in degrading organic pollutants

A technology of activated carbon and catalyst, which is applied in the field of wastewater treatment, can solve the problems of difficult to achieve satisfactory treatment effect, high toxicity of organic pollutant chemical structure, high difficulty of treatment, etc., and achieve the effect of good decolorization effect, low price and simple preparation method

Inactive Publication Date: 2012-06-20
WUHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Due to the stable chemical structure and high toxicity of organic pollutants, the treatment is difficult, and the traditional treatment technology has been severely challenged
It is difficult to achieve a satisfactory treatment effect by applying conventional treatment techniques, such as physical and chemical methods, chemical methods, biological methods and their combinations.

Method used

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  • Activated carbon loaded iron-cobalt oxide catalyst and application thereof in degrading organic pollutants
  • Activated carbon loaded iron-cobalt oxide catalyst and application thereof in degrading organic pollutants
  • Activated carbon loaded iron-cobalt oxide catalyst and application thereof in degrading organic pollutants

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Experimental program
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Effect test

Embodiment 1

[0029] Embodiment one: Prepare an activated carbon-supported iron-cobalt oxide catalyst with a cobalt-iron molar ratio of 1:1. The activated carbon-supported cobalt-iron oxide catalyst activates persulfate and treats organic wastewater.

[0030] The preparation method comprises the following steps:

[0031] (1) After impregnating activated carbon with 10wt% hydrochloric acid solution for 24h, filter and wash with deionized water until neutral;

[0032] (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.

[0033] (3) Add 1 gram of activated carbon to 50ml containing 1.25*10 -3 mol iron ion and 1.25*10 -3 In the salt solution of mol cobalt ion, add hydrochloric acid to adjust the pH of the solution to be 2-7;

[0034] (4) soaking the obtained solution at 40° C. for 24 hours;

[0035] (5) Filter the impregnation solution and...

Embodiment 2

[0039] Embodiment two: An activated carbon-supported iron-cobalt oxide catalyst with a cobalt-iron molar ratio of 1:1 was prepared to treat organic wastewater in combination with ultrasonic waves and persulfate.

[0040] The preparation method comprises the following steps:

[0041] (1) After impregnating activated carbon with 10wt% nitric acid solution for 24h, filter and wash with deionized water until neutral;

[0042] (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.

[0043] (3) Add 1 gram of activated carbon to 50ml containing 1.25*10 -3 mol iron ion and 1.25*10 -3 In the salt solution of mol cobalt ion, add hydrochloric acid to adjust the pH of the solution to be 2-7;

[0044] (4) soaking the obtained solution at 40° C. for 24 hours;

[0045] (5) Filter the impregnation solution and dry it at 120°C for 12 hours; ...

Embodiment 3

[0052] Embodiment three: An activated carbon-supported iron-cobalt oxide catalyst with a cobalt-iron molar ratio of 1:2 was prepared, and it was combined with ultrasonic waves and persulfate to treat organic wastewater.

[0053] The preparation method comprises the following steps:

[0054] (1) After impregnating activated carbon with 10wt% hydrochloric acid solution for 24h, filter and wash with deionized water until neutral;

[0055] (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.

[0056] (3) Add 1 gram of activated carbon to 50ml containing 1.25*10 -3 mol iron and 6.3*10 -4 In the salt solution of mol cobalt ion, add hydrochloric acid to adjust the pH of the solution to be 2-7;

[0057] (4) soaking the obtained solution at 60° C. for 24 hours;

[0058] (5) Filter the impregnation solution and dry it at 120°C for 1...

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Abstract

The invention relates to an activated carbon loaded iron-cobalt oxide catalyst of which the components and content in weight percentage are that: 80.0 percent to 99.0 percent of activated carbon and 1.0 percent to 20.0 percent of iron-cobalt bi-metal oxide, wherein the cobalt and iron mole ratio is 1:1 to 1:19. The catalyst is integrated with ultrasonic wave and persulfate, and is used for treating organic wastewater. The catalyst and the persulfate are used for treating the organic wastewater with azo dye orange II as a target pollutant, and the decolorization rate reaches 74.5 percent within 30min; after the ultrasonic wave is added, the decolorization rate can be improved to 81.2 percent within 30min, and the total organic carbon (TOC) removal rate can reach 43.4 percent. The catalyst has the advantages of high catalytic efficiency and low metal ion dissolution rate. The catalyst is integrated with the ultrasonic wave and the activated persulfate to treat the organic pollutants in the wastewater, the treatment is carried out under milder conditions, the method is simple, the cost is low and the treatment effect is good.

Description

technical field [0001] The invention relates to an activated carbon-supported iron-cobalt double metal oxide catalyst, and the combination of the catalyst with persulfate and ultrasonic waves to treat organic pollutants in waste water, belonging to the field of waste water treatment. Background technique [0002] Organic wastewater is a kind of wastewater that is difficult to degrade. Taking printing and dyeing wastewater as an example, it has a large amount of discharge, high content of organic pollutants, and complex types. Due to the stable chemical structure, high toxicity and high difficulty of treatment of organic pollutants, the traditional treatment technology has been severely challenged. It is difficult to achieve a satisfactory treatment effect by applying conventional treatment techniques, such as physical and chemical methods, chemical methods, biological methods and their combinations. [0003] Advanced oxidation technology, which is characterized by producin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/75C02F1/36C02F1/72C02F101/30
Inventor 张晖高洪王莉果张道斌
Owner WUHAN UNIV
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