Filtration industry

Air filtration, water and wastewater treatment, the development of new products that have effective absorbents with the least harmful effects on the environment and are inexpensive, and are also used to remove or reduce heavy metals in industrial wastewater, is one of the most important issues in science. material According to the research, it was found that hydroxyapatite has a high ability to absorb Pb, V, As, Cd and U elements. This is important because of the presence of various reactive surface areas on hydroxyapatite.

Due to its polycationic nature, chitosan can act as a coagulant and can also trap heavy metal ions as a chelating agent.

Zinc Oxide nanoparticles are used in water and wastewater treatment to remove environmental pollution due to their antibacterial and antiseptic properties.

When hydroxyapatite is placed on the filter cloth, it can remove microbes in contaminated liquids, and due to its stability and flexibility, these types of filters are very suitable for the production of face masks and respirators. The hydroxyapatite particles on the fabric fill some of the gaps between the fibers, which can easily kill or inactivate bacteria. This effect increases by adding the number of filter fabric layers. Due to the stability and flexibility of the fabric containing hydroxyapatite, they are ideal for face and respiratory masks.

Since 1970, there have been many reports aiming to use TiO2 photocatalyst to remove pollutants. Scientists have developed countless principles in the field of water purification and in the studies of various systems, they are well aware that the TiO2 photocatalyst powder must be dispersed in a liquid suspension, and after the destructive process of contaminated materials by UV light, the powder is separated from the water in the form of a suspension.

By using reactors containing TiO2, organic materials can be oxidized and converted into water and carbon dioxide and their raw materials. These reactors operate at room temperature and at low pressure, so they can be used for systems in any air and ventilation conditions. The filter of these reactors contains TiO2 and active carbon absorbent powder to absorb the gases in the air. This filter can be used to clean the air, deodorize the space and finally to purify the air in the refrigerator and kitchen.