"Invisible Guardian" in sewage treatment: ozone decomposition catalyst

Ozone dilemma of sewage treatment
In the field of sewage treatment, ozone has become a key treatment means with its strong oxidation capacity, which is widely used in disinfection, deodorization, decolorization and organic degradation. However, after ozone has played its role, the treatment of exhaust gas has become a thorny problem.
Because ozone has a certain toxicity, high concentration in the environment will cause adverse effects on human health and ecosystems, such as stimulating the respiratory tract, damaging the eyes, and also affect the air quality of the surrounding environment. Traditional ozone exhaust treatment methods, such as thermal decomposition, although can make ozone decomposition, but often need to consume a lot of energy, high cost; However, the activated carbon adsorption method has some disadvantages such as limited adsorption capacity, easy saturation and secondary pollution. Therefore, it is urgent to find an efficient, energy-saving and environmentally friendly ozone exhaust treatment method, which also makes the ozone decomposition catalyst come into being, and brings new hope for solving the problem of ozone exhaust in sewage treatment.
What is the ozonolysis catalyst?
Basic composition
Ozonolysis catalysts are usually composed of a variety of metal oxides, common including manganese, copper, iron, cobalt and other metal oxides, these metal oxides often have unique crystal structures and electronic properties, providing a key active site for catalytic reactions. For example, manganese ions in manganese oxides can exist in a variety of valence states, which makes it flexible to participate in electron transfer during catalysis, thus promoting the decomposition reaction of ozone. The carrier material plays the role of supporting the active component, the common carriers are alumina, titanium dioxide, activated carbon, etc., they have a large specific surface area and good pore structure, not only can increase the contact area of the catalyst and ozone, but also can provide a suitable space environment for the reaction, so that the catalytic reaction can be carried out more efficiently.
Working principle
Its working principle is mainly based on REDOX reaction. When ozone molecules come into contact with the catalyst surface, the active site of the catalyst will adsorb the ozone molecules, deforming them and weakening the oxygen-oxygen bond within them. In this process, metal ions in metal oxides will undergo valence changes, such as manganese ions in manganese oxides may change from a higher to a lower state, while transferring electrons to ozone molecules, prompting the decomposition of ozone molecules into oxygen. This catalytic reaction can greatly accelerate the rate of ozone decomposition, compared with the slow decomposition process of ozone in the natural state, with the participation of the catalyst, the rate of ozone decomposition can be increased tens or even hundreds of times, thus effectively reducing the concentration of ozone, reducing its potential harm to the environment and the human body.