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Preparation and application of catalyst for advanced treatment of printing and dyeing waste water by Fenton-like process

A printing and dyeing wastewater and advanced treatment technology, applied in the field of water treatment technology and functional materials, can solve the problem of high cost, achieve the effect of low production cost, mild reaction conditions, and easy industrialization

Active Publication Date: 2014-06-25
山东环发海若环境技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, the patent No. CN1562798A uses alumina as a carrier to carry active component iron to treat phenol and nitrophenol wastewater, which can achieve good catalytic effect; the patent No. CN102101053A uses alumina, titanium oxide or activated carbon as The carrier supports noble metal ruthenium or cobalt as the active component, and the second component Ce or Fe is added to prepare a catalyst for treating organic wastewater. Although the effect is good, the cost is relatively high

Method used

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  • Preparation and application of catalyst for advanced treatment of printing and dyeing waste water by Fenton-like process
  • Preparation and application of catalyst for advanced treatment of printing and dyeing waste water by Fenton-like process
  • Preparation and application of catalyst for advanced treatment of printing and dyeing waste water by Fenton-like process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] ① Dissolve 0.2mol of zirconium oxychloride and 0.8mol of aluminum nitrate in 2.5L of ultrapure water, add 5ml of nitric acid and 100ml of hydrogen peroxide, and stir vigorously for 20 minutes to prepare a zirconium-aluminum composite salt solution.

[0029] ②The zirconium-aluminum compound salt solution was added dropwise to 1L of 12.5% ​​ammonia water at a rate of 15ml / min to form a white jelly.

[0030] ③ The colloid was aged at room temperature for 12 hours, vacuum filtered and washed, and the obtained filter cake was fully kneaded and extruded.

[0031] ④ After the extrudate is dried at room temperature, it is dried at 120°C for 2 hours, and then calcined in one or two steps at 500-800°C for 2-8 hours. The carrier number is zirconium-aluminum composite oxide carrier-1.

Embodiment 2

[0033] ① Dissolve 0.2mol of zirconium oxychloride and 0.8mol of aluminum nitrate in 2.5L of ultrapure water, add 5ml of nitric acid, and stir vigorously for 20 minutes to prepare a zirconium-aluminum composite salt solution.

[0034] ②The zirconium-aluminum compound salt solution was added dropwise to 1L of 12.5% ​​ammonia water at a rate of 15ml / min to form a white jelly.

[0035]③ The colloid was aged at room temperature for 12 hours, vacuum filtered and washed, and the obtained filter cake was fully kneaded and extruded.

[0036] ④ After the extrudate is dried at room temperature, it is dried at 120°C for 2 hours, and then calcined in one or two steps at 500-800°C for 2-8 hours. The carrier number is zirconium aluminum composite oxide carrier-2.

Embodiment 3

[0038] ① Prepare different concentrations of copper nitrate, nickel nitrate, and ferric nitrate solutions.

[0039] ②Impregnate zirconium-aluminum composite oxide carrier-1 in acid copper, nickel nitrate, and ferric nitrate solution respectively, impregnate overnight at room temperature, dry at 110°C for 3h, and then calcinate at 400°C for 3h to obtain active components (based on metal elements) with a loading of 2% catalyst. They are numbered Catalyst-A, B, and C respectively.

[0040] ③Impregnate zirconium-aluminum composite oxide carrier-2 in acid copper, nickel nitrate, and ferric nitrate solutions, impregnate overnight at room temperature, dry at 110°C for 3h, and then calcinate at 400°C for 3h to obtain active components (based on metal elements) with a loading of 2% catalyst. They are numbered Catalyst-D, E, F respectively.

[0041] The catalyst is used to treat the refractory printing and dyeing wastewater passing through the biochemical pool, the initial reaction p...

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Abstract

The invention relates to preparation and application of a catalyst for advanced treatment of printing and dyeing waste water by Fenton-like process, which belongs to the field of water treatment. The catalyst adopts transition metals of Cu, Fe, and Ni as active components, adopts zirconium aluminium composite oxide as a carrier, is prepared by an isometric impregnation roasting method, and is mainly used for treatment of printing and dyeing waste water that is difficult to degrade. The catalyst prepared in the invention can treat printing and dyeing waste water with a COD concentration of more than 240 mg / L under the reaction condition with a reaction temperature of 20 DEG C, a pH value of 2-7, a ratio of H2O2 (mg / L) to COD (mg / L) of 0.3-1.5, and residence time of 1 hour, and the effluent after treatment has a COD of less than 50 mg / L; catalytic activity of the catalyst is not changed after continuous operation for 100 hours in a pilot scale test, and the catalyst can be popularized in industrial application of advanced treatment of printing and dyeing waste water by Fenton-like process.

Description

technical field [0001] The invention relates to a supported catalyst with transition metals Cu, Fe and Ni as active components and a zirconium-aluminum composite oxide as a carrier and a preparation method thereof, which can be used for advanced treatment of refractory printing and dyeing wastewater similar to the Fenton method, and belongs to water treatment technology and The field of functional materials. Background technique [0002] In recent years, advanced oxidation technology (Advanced Oxidation Process, AOPs) treatment of refractory organic wastewater has received widespread attention. Among them, catalytic wet peroxide oxidation technology (Catalytic Wet Peroxide Oxidation, referred to as CWPO) uses hydrogen peroxide with strong oxidation As an oxidizing agent, hydrogen peroxide decomposes into more oxidizing hydroxyl radicals (OH) during the reaction process, and then oxidizes organic pollutants into small molecular organic substances and even directly mineralizes...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/755C02F1/72
Inventor 孙承林刘培娟卫皇曌于永辉蒋文天杨旭王亚旻
Owner 山东环发海若环境技术有限公司
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