Metal-doped ceramsite catalyst, preparation method and applications thereof

Abstract

The invention discloses a metal-doped ceramsite catalyst, which is prepared by sintering a metal salt with ozone catalytic effect and a ceramic matrix component, wherein the ceramic matrix component comprises pottery clay, a pore-forming agent, vermiculite and a fluxing agent, the fluxing agent is a composition of calcium carbonate and magnesium carbonate, and the catalyst is large in specific surface area, high in porosity, good in catalytic oxidation effect, low in metal dissolution rate, high in utilization rate and low in secondary pollution. The invention further discloses a preparation method of the metal-doped ceramsite catalyst, wherein the preparation method of the ceramsite core is optimized, the doping mode of active components is improved, the catalyst can load high-content metal salt, the use amount of raw materials is small, the production cost is low, the safety is high, repeatability is achieved, and large-scale production and application can be achieved. The inventionfurther discloses applications of the metal-doped ceramsite catalyst, wherein the catalytic oxidation effect is good, organic pollutants in various kinds of sewage can be effectively removed, the utilization rate is high, secondary pollution is reduced, and follow-up treatment is not needed.

Description

technical field [0001] The invention relates to the technical field of catalysts, in particular to a metal-doped ceramsite catalyst and its preparation method and application. Background technique [0002] With the development and progress of all aspects of society, the water environment system that people rely on for survival is also being damaged more and more seriously, and water treatment is extremely urgent. Based on the consideration of treatment costs, most industrial wastewater currently adopts biological treatment methods. However, due to the complex composition of industrial wastewater and the presence of refractory organic matter, biological treatment methods are often unstable in meeting water quality standards; especially in the context of continuous improvement of drainage standards, It is extremely difficult to continue to use biological treatment methods to improve the quality of effluent water. [0003] As a green and strong oxidant, ozone has a strong abil...

AI Technical Summary

Problems solved by technology

However, when the metal oxide catalyst is mixed with the carrier material, the particles of the oxide are limited by mechanical grinding, and the particles are often coarse, which affects its catalytic oxidation effect; while the ceramsite catalyst supported by the metal salt in the prior art often has limited The specific surface area affects the effect of catalyzing ozone, and the commonly used potassium permanganate is a dangerous product that is prone to poisoning and explosives, and the market price is high, which makes it difficult for the catalyst to achieve large-scale industrial production, which limits practical applications.

In addition, the existing doping method to prepare metal-type ceramsite catalysts still has problems such as uneven distribution of active components, limited solubility of metal salts, and easy dissolution of metals, which affect its catalytic effect and popularization and application.

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