Catalysis for advanced oxidation degradation of organic wastes in wastewater

Abstract

The invention discloses a catalysis for advanced oxidation degradation of organic wastes in wastewater. A preparation method of the catalyst comprises the steps: regulating the pH value of a sodium silicate solution to be within the range of 12-13 by using sulfur acid or sodium hydroxide to form a clear solution; mixing a soluble metal salt solution with a sodium silicate solution, and carrying out a neutralization and sedimentation reaction to generate a silica gel and metal hydroxide doped sediment, regulating the PH value of the mixed solution to 6-8 by using dilute sulfur acid, then, keeping mixing, and further carrying out an aging reaction; and carrying out filtering separation and drying treatment on the reacted and aged sediment, then, adding an additive accounting for 5-12% of themass of the sediment, carrying out mixing, extruding the mixture by using a die to form a blank body with a honeycomb structure, drying the blank body, and roasting the blank body at the temperatureof 400-600 DEG C to obtain catalyst honeycomb filler with high specific surface area.

Description

Technical field [0001] The invention belongs to the technical field of chemical environmental protection, and particularly relates to a catalytic oxidation catalyst for difficult-to-degrade organics in wastewater and a preparation method thereof. Background technique [0002] With the rapid development of my country's industry, sewage discharge is increasing day by day, and a large number of difficult-to-biodegradable chemicals are discharged into the environment in the form of wastewater, causing serious pollution of water resources, which has become a pain point and a hot spot of social development. Especially in the industrial production process of coking, petrochemical, printing and dyeing, pharmacy, organic synthesis, etc., the anhydrous contains a lot of toxic organic matter and high concentration of salt, such as sodium sulfate, sodium chloride, sodium nitrate, copper sulfate, etc., making it impossible to pass directly The biochemical treatment method requires the crystal...

AI Technical Summary

Problems solved by technology

Especially the anhydrous discharged from coking, petrochemical, printing and dyeing, pharmaceutical, organic synthesis and other industrial production processes contains a large amount of toxic organic matter and high concentration of salt, such as sodium sulfate, sodium chloride, sodium nitrate, copper sulfate, etc., making it impossible to pass directly The biochemical treatment method needs to crystallize and separate the industrial salt in the wastewater, and then perform biochemical treatment, resulting in toxic industrial waste salt, which cannot be used as a resource for industrial salt; at the same time, because the organic matter in the wastewater contains formaldehyde, alcohols, and Phenolic substances that are difficult to degrade and have a high boiling point cannot be treated by conventional catalytic oxidation, and for salty wastewater, the salt obtained by distillation and crystallization is waste salt, which cannot be recycled

As a newly developed oxidation method, advanced oxidation can obtain free radicals with extremely strong oxidizing ability by screening suitable catalysts, and oxidize macromolecular organic wastes with high bond energy in water into easily degradable and low-toxic small molecules, but its catalyst and core process technology All are imported from abroad, the cost is high, which is not conducive to the development of domestic sewage treatment technology