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Active carbon loaded zinc oxide catalyst and application thereof in degradation of organic pollutant

A technology of activated carbon and zinc oxide, applied in the field of water treatment, can solve the problems of high toxicity of the chemical structure of organic pollutants, difficulty in achieving satisfactory treatment effect, and high difficulty in treatment, and achieve the effect of good decolorization effect, low cost, and simple preparation method

Inactive Publication Date: 2012-10-24
WUHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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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  • Active carbon loaded zinc oxide catalyst and application thereof in degradation of organic pollutant
  • Active carbon loaded zinc oxide catalyst and application thereof in degradation of organic pollutant

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Example one: The activated carbon supported zinc oxide catalyst is prepared, and the activated carbon supported zinc oxide catalyst activates peroxodisulfate to treat organic wastewater.

[0026] The method includes the following steps:

[0027] (1) After immersing activated carbon (PAC) with 10wt% inorganic acid solution for 24h, filter and wash with deionized water until neutral, and then immerse it with 10wt% inorganic alkali solution for 24h, filter and wash with deionized water until neutral; put it in the oven Medium, drying at 90~100℃;

[0028] (2) Add 1g of activated carbon to 50ml containing 4.58×10 -4 mol zinc ion in salt solution;

[0029] (3) Immerse the above solution at 25℃ for 24h;

[0030] (4) Filter the immersion liquid and dry it at 120℃ for 12h;

[0031] (5) The obtained solid sample was transferred into a tube furnace, heated to 300°C in a nitrogen atmosphere, and calcined for 4-6 hours. The product obtained was cooled to room temperature in nitrogen to obtai...

Embodiment 2

[0038] Embodiment two: The activated carbon supported zinc oxide catalyst is prepared, and the activated carbon supported zinc oxide catalyst activates peroxodisulfate to treat organic wastewater.

[0039] The method includes the following steps:

[0040] (1) After immersing the activated carbon with 10wt% inorganic acid solution for 24h, filter and wash with deionized water until it is neutral, then immerse it with 10wt% inorganic alkali solution for 24h, filter and wash with deionized water until it is neutral; put it in an oven, 90 ~100℃ drying;

[0041] (2) Add 1 gram of activated carbon to 50ml containing 4.58*10 -4 mol zinc ion salt solution,

[0042] (3) Immerse the above solution at 25℃ for 24h;

[0043] (4) Filter the immersion liquid and dry it at 120℃ for 12h;

[0044] (5) The obtained solid sample was transferred into a tube furnace, heated to 300°C in a nitrogen atmosphere, and calcined for 4-6 hours. The product obtained was cooled to room temperature in nitrogen to obtai...

Embodiment 3

[0047] Embodiment three: The activated carbon supported zinc oxide catalyst is prepared, and the activated carbon supported zinc oxide catalyst activates peroxymonosulfate to treat organic wastewater.

[0048] The method includes the following steps:

[0049] (1) After immersing the activated carbon with 10wt% inorganic acid solution for 24h, filter and wash with deionized water until it is neutral, then immerse it with 10wt% inorganic alkali solution for 24h, filter and wash with deionized water until it is neutral; put it in an oven, 90 ~100℃ drying;

[0050] (2) Add 1 gram of activated carbon to 50ml containing 1.53*10 -4 mol zinc ion salt solution,

[0051] (3) Immerse the above solution at 25℃ for 24h;

[0052] (4) Filter the immersion liquid and dry it at 120℃ for 12h;

[0053] (5) The obtained solid sample was transferred into a tube furnace, heated to 300°C in a nitrogen atmosphere, calcined for 4-6 hours, and the product was reduced to room temperature in nitrogen to obtain an...

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Abstract

The invention relates to active carbon loaded zinc oxide catalyst and application thereof for treating organic wastewater after being combined with ultrasonic wave or ultraviolet light and persulfate. The catalyst can be combined with disulfate to treat the organic wastewater taking azo dye orange II as target pollutant, and decolorization rate can reach 68% in 60 minutes; and after the ultrasonic wave is jointly used, the decolorization rate can be increased to 92% in 60 minutes; meanwhile, the catalyst can be combined with peroxy-monosulfate to treat the organic wastewater taking azo dye reactive black 5 as target pollutant, and decolorization rate can reach 36% in 60 minutes; and after the ultraviolet light is jointly used, the decolorization rate can be increased to 91% in 60 minutes. The active carbon loaded zinc oxide catalyst is high in catalyzing efficiency and low in metal ion digestion. The active carbon loaded zinc oxide catalyst is combined with the ultrasonic wave or the ultraviolet light and the persulfate to treat organic pollutant in the wastewater, the treatment can be performed in a mild condition, and the treatment is simple to process, low in cost and good in treatment efficiency.

Description

technical field [0001] The invention relates to an activated carbon-loaded zinc oxide catalyst and its application in degrading organic pollutants, belonging to the technical field of 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 producing a large amount of · OH is an oxidant, and under the reaction conditions of high t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/06C02F1/72C02F1/36C02F1/32
Inventor 张晖高洪王雪易盼张道斌
Owner WUHAN UNIV
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