Catalyst for catalytic ozonation synergistic degradation of coal chemical wastewater and preparation method thereof

By using sodium hydroxide modified γ-alumina and Y-type molecular sieve carriers, the iron/bismuth double-doped active sites are supported, and sucrose and urea are added, the problem of difficult degradation of organic matter in coal chemical wastewater in the prior art is solved, and a high-efficiency and low-cost catalytic degradation effect is achieved.

CN119702053AActive Publication Date: 2025-03-28NANJING NORMAL UNIVERSITY +1
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Patent Information

Application Number
CN202411902204.4
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-12-23
Publication Date
2025-03-28
Estimated Expiration
2044-12-23

AI Technical Summary

Technical Problem

The prior art is difficult to effectively degrade organic matter when treating coal chemical wastewater, and the catalyst preparation cost is high, the active components are single, and the degradation efficiency decreases when complex pollutants are complex.

Method used

Sodium hydroxide modified γ-alumina and Y-type molecular sieve are used as composite support, and iron/bismuth double-doped active sites are supported, and sucrose and urea are added as synergistic catalysts to improve the catalytic oxidation efficiency of ozone.

Benefits of technology

The prepared catalyst has multiple active sites, improves the efficiency of ozone catalytic oxidation, can effectively degrade COD and phenol in coal chemical wastewater, with a removal rate of more than 80%, and is simple in process and low in cost.

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Abstract

The invention discloses a catalyst for catalytic ozonation synergistic degradation of coal chemical wastewater and a preparation method thereof, the target catalyst is prepared by using a sodium hydroxide modified gamma-alumina and Y-type molecular sieve composite carrier and loaded iron / bismuth double-doped active components by using a hydrothermal method. A sodium hydroxide solution is used for modifying and optimizing the loading capacity of a carrier, iron / bismuth double doping is used for increasing active sites, cane sugar and urea are added for synergistic catalysis, the ozone catalytic efficiency is improved, and degradation of organic matter and COD in coal wastewater is accelerated. The prepared catalyst is simple in preparation process, good in catalytic oxidation effect and free of secondary pollution, and has wide market prospects in the aspect of sewage treatment.
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