Activated alumina is aluminum oxide in the form of very porous spheres that are literally "tunneled" at the microscopic level.
Activated alumina has many different applications, one of the most important of which being desiccation, the adsorption of water. As a desiccant, activated alumina can be used to dry compressed air and other gas and liquid streams. Additionally, the adsorbent is often used to purify gas streams by the selective adsorption of specific molecules. Activated alumina also has water filtration and catalyst applications; for example, it is commonly used in the Claus process, a desulfurizing treatment for natural gas.
Besides activated alumina is very useful in the clean up of toxic wastes and rain water runoff from contaminated areas. Rainwater can pick up contaminants such as soluble metals from industrial activity. It can also wash contaminants such as arsenic and lead into ground water from mining operations. Activated alumina is excellent not only for cleaning up toxic spills but it's also good for cleaning up toxic sites that have been long abandoned and are only now being targeted for clean up.
Activated alumina is an efficient way to clean up the environment. It's ability to bind with toxic substances means that these substances don't leak back into the environment when disposed of.
An important feature of activated alumina is that it is very stable. It will bond with other substances without changing its own chemistry or form. And because it is so porous, its surface area is far greater than its weight, enabling it to adsorb a great deal.
It is also used for water purification in industrial applications, municipal water treatment facilities and in home use. It is excellent at removing fluoride from drinking water as well as lead, arsenic and other contaminants.
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