Composite catalyst for catalytic ozonation and preparation method thereof

Abstract

The invention provides a composite catalyst for catalytic ozonation and a preparation method thereof. The composite catalyst for catalytic ozonation comprises an active carrier and metal active components loaded on the active carrier, wherein the metal active components comprise a lanthanum compound and a cerium compound; the lanthanum compound accounts for 1%-5% of the mass of the active carrier in terms of a metal element; and the cerium compound accounts for 2-7% of the mass of the active carrier in terms of a metal element. The composite catalyst for catalytic ozonation and the preparation method thereof provided by the invention have the advantages that the composite catalyst for catalytic ozonation and the preparation method thereof are particularly suitable for catalytic ozonation treatment of sewage containing macromolecular organic matters; through the activity of the catalytic ozonation effects, chemical bonds with relatively weak bond energy in macromolecular organic matters in the sewage are broken, and substances with relatively small molecular weight are generated, so the structures of organic matters which are difficult to biodegrade are effectively changed, and the biodegradability of a water body is improved.

Description

technical field [0001] The invention belongs to the technical field of catalyst preparation, and in particular relates to a composite catalyst for ozone catalytic oxidation and a preparation method thereof. Background technique [0002] Natural water has a certain self-purification ability, and the oxidation and decomposition of microorganisms is the main way for water self-purification. Small molecular organic matter in water can provide food for microorganisms, but for large molecular organic matter, it is difficult for microorganisms to directly use them. At the same time, these macromolecular organic substances combine with the metabolites of various microorganisms to form larger polymeric molecular clusters, which are further closely combined with pollutants in the water body through adsorption, eventually resulting in the loss of the self-purification ability of the water body, and accompanied by water body development. The occurrence of phenomena such as blackening a...

AI Technical Summary

Problems solved by technology

Small molecular organic matter in water can provide food for microorganisms, but for large molecular organic matter, it is difficult for microorganisms to directly use them.

At the same time, these macromolecular organic substances combine with the metabolites of various microorganisms to form larger polymeric molecular clusters, which are further closely combined with pollutants in the water body through adsorption, eventually resulting in the loss of the self-purification ability of the water body, and accompanied by water body development. The occurrence of phenomena such as blackening and odor will have a great impact on the surrounding environment

[0003] Using ozone alone to treat sewage can only play a certain role in decolorization and deodorization, and the removal efficiency of some difficult-to-oxidize pollutants is limited

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