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Zone heterogeneous catalytic oxidation technology for removing pollutants by red-mud catalyst

An ozone oxidation, red mud-based technology, applied in oxidation water/sewage treatment, physical/chemical process catalyst, metal/metal oxide/metal hydroxide catalyst, etc., can solve the problems of high cost and low catalytic efficiency, etc. To achieve the effect of high self-stability, easy preparation and no secondary pollution

Inactive Publication Date: 2012-06-20
BEIJING FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the catalysts currently used generally have low catalytic efficiency, high cost, and certain selectivity, which are difficult to meet actual needs.

Method used

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  • Zone heterogeneous catalytic oxidation technology for removing pollutants by red-mud catalyst
  • Zone heterogeneous catalytic oxidation technology for removing pollutants by red-mud catalyst

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Experimental program
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specific Embodiment approach 1

[0012] Specific implementation mode one: the preparation method of the red mud-based heterogeneous catalytic ozone oxidation decontamination water advanced treatment technology catalyst in this embodiment is: (1) preparing sulfuric acid solution with a concentration level of 0.5mol / L and storing it at room temperature; (2) ) After cleaning an appropriate amount of raw red mud with distilled water for 5 times, remove the ash on the surface of the raw red mud, and dry it at a temperature of 70°C; (3) Put the cleaned red mud in a beaker, and add distilled water, Form a suspension with a concentration of about 10g / L. Under the agitation of a magnetic stirrer, slowly add the above-mentioned acidic solution drop by drop, and monitor the pH value of the solution with a pH meter. The pH is 6 (±0.2) as the titration end point, and Keep stirring for 12 hours, then age at room temperature for 24 hours; pour off the supernatant, and dry the remaining suspension at 70°C for 12 hours to obta...

specific Embodiment approach 2

[0016] Embodiment 2: The difference between this embodiment and Embodiment 1 is that in the catalyst preparation step (1) sulfuric acid solution, the concentration level is 0.5 mol / L, which can be nitric acid solution, and the concentration level is 1.0 mol / L. Other steps and parameters are the same as those in Embodiment 1.

specific Embodiment approach 3

[0017] Embodiment 3: The difference between this embodiment and Embodiment 1 is that in the catalyst preparation step (1) sulfuric acid solution, the concentration level is 0.5 mol / L, which can be hydrochloric acid solution, and the concentration level is 1.0 mol / L. Other steps and parameters are the same as those in Embodiment 1.

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Abstract

The invention aims to provide a novel ozone heterogeneous catalysis water advanced treatment technology and a preparation method of a catalyst. The catalyst can remarkably enhance the adsorption of ozone and organic pollutants on the surface of the catalyst to achieve the adsorption effect and the oxidative degradation coupling effect and finally achieve the enhanced removal of difficultly degraded organic pollutants. Compared with the ozone heterogeneous catalysis water treatment technology, the invention can remarkably improve the pollutant removal effect of the heterogeneous catalysis water treatment technology, and greatly reduces the raw material cost and the preparation cost of the catalyst at the same time; waste residue-red mud produced during the alumina preparation process is in resource utilization, and a new water treatment way using waste to treat waste and changing waste into valuables is provided.

Description

technical field [0001] The invention relates to a heterogeneous catalytic ozone oxidation decontamination water advanced treatment technology. Background technique [0002] In recent years, with the extensive application of chemical synthesis products in people's daily life and industrial and agricultural production, the types and contents of refractory organic pollutants and new pollutants in the water environment have increased significantly. The increasingly complex water pollution situation poses new challenges to my country's water quality safety assurance technology. Since conventional water treatment and sewage treatment processes are mainly to remove suspended and colloidal pollutants in water, the ability to remove organic pollutants, especially refractory organic pollutants, is very limited or even powerless. Therefore, advanced treatment technology must be used to further ensure water quality safety. Among them, the ozone heterogeneous catalytic oxidation techno...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/78C02F1/28B01J23/745B01J21/12B01J35/10
Inventor 齐飞康雅凝赵伦徐冰冰
Owner BEIJING FORESTRY UNIVERSITY
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