activated alumina

noun Chemistry.
alumina in the form of granules having many fine pores, used to adsorb water and various gases.
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activated alumina
 
n
a granular highly porous and adsorptive form of aluminium oxide, used for drying gases and as an oil-filtering material and catalyst

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Example sentences
Activated alumina adsorption process removes fluoride from ground water.
Granular activated alumina was the first adsorptive media successfully used.
Activated alumina is a sorption process that uses porous, granular material with ion exchange properties.
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