Method for recovering powdery titania light catalyst

Abstract

A process for recovering the powdered TiO2-type photocatalyst features that the aqueous solution of high-molecular flocculant is mixed with the sewage treated by photocatalyst to separate the photocatalyst from water, and the photocatalyst is washed several times for removing electrolyte.

Description

technical field [0001] The invention belongs to the field of recovery of photocatalysts, in particular to methods for separating and recovering powdery titanium dioxide photocatalysts and water. Background technique [0002] The separation and recovery of photocatalysts from treated sewage is one of the key limiting factors that restrict the application of photocatalyst technology in water treatment from laboratory technology to practical application. At present, the laboratory commonly used powdered TiO 2 Photocatalyst suspended in water or other solvents to study TiO 2 Photocatalytic degradation of organic matter and its influencing factors. Although the small size of powdered TiO 2 Photocatalysts have the advantages of large contact surface with pollutants, high light utilization efficiency, and high photocatalytic activity. However, in the face of practical applications, their disadvantages are also obvious, that is, it is difficult to separate the catalyst from water...

AI Technical Summary

Problems solved by technology

However, due to the high activity of the catalyst requires the particle size of the catalyst to be small, common methods such as filtration and sedimentation are difficult to apply, and must be replaced by high-speed centrifugation, solvent extraction and other methods

However, these methods generally have the disadvantages of high energy consumption, time-consuming or the need for a large amount of expensive solvents.

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