What are the functions of activated alumina? Due to its numerous capillary channels and large surface area, activated alumina can use as an adsorbent, desiccant, and catalyst. At the same time, it determines by the polarity of the adsorbed substance and has strong affinity for water, oxides, acetic acid, alkali, etc. It is a micro water deep drying agent and an adsorbent for polar molecules.
Activated Alumina for Fluoride Removal
Activated alumina has good adsorption and defluorination effect, stable capacity, and can absorb 6400 grams of fluoride per cubic meter of activated alumina. It has high strength, low wear, no softening after water immersion, no expansion, no pulverization, and no cracking. It can also remove pollutants such as sulfur gas, hydrogen, sulfur dioxide, hydrogen fluoride, and hydrocarbons from exhaust gas, especially suitable for defluorination treatment of fluorine-containing water. So, what are the characteristics of different active oxidants with different functions?
- Activated alumina desiccant: This product is a multi microporous spherical substance with strong adsorption function, large specific surface area, high compressive hardness, long service life, and can be repeatedly-used through regeneration methods. It is usually a white, spherical porous substance that is non-toxic, odorless, non powdering, and insoluble in water. It is widely used in instrument air drying in industries such as petrochemicals, chemicals, textiles, and metallurgy. In pressure swing adsorption air separation devices, the adsorption dew point can reach -41 degrees or more. It can also be for deep drying of liquid and gas phases in steel, petroleum cracking gas, ethylene, and propylene.
- Activated alumina defluorination agent: This product is a white or slightly red spherical particle that does not soften or crack in water, and has strong adsorption for fluoride. It is mainly for defluorination of drinking water in high fluoride areas to eliminate “fluorosis”.
- Activated alumina adsorbent: This product is white or slightly red spherical particles, insoluble in water and other organic solvents, and has a strong adsorbent. Mainly for the recycling and regeneration of hydrogen peroxide in hydrogen peroxide production equipment, adsorbing moisture and impurities in the working fluid.
Conclusion
When activated alumina is in the form of white or slightly red spherical particles, it has many capillary pores and high activity. It has good treatment effect on high fluoride water, is easy to regenerate, and has less interfering substances. In addition to being for defluorination in drinking water, it can also be as an adsorbent, desiccant, and catalyst carrier. Widely used in industries such as tap water engineering, specialized water purification engineering, hydrogen peroxide plants, fertilizer plants, oxygen plants, and petrochemicals.
