activated alumina


Also found in: Dictionary, Wikipedia.

activated alumina

[′ak·tə‚vād·əd ə′lüm·ə·nə]
(materials)
Highly porous, granular aluminum oxide that preferentially absorbs liquids from gases and vapors, and moisture from some liquids; also used as a catalyst or catalyst carrier, as an absorbent to remove fluorides from drinking water, and in chromatography.

activated alumina

A form of aluminum oxide which adsorbs moisture readily and is used as a drying agent.
References in periodicals archive ?
[USPRwire, Thu Aug 08 2019] Activated alumina process is one of the most prevalently used adsorption methods for the defluoridation of drinking water.
[ClickPress, Thu Aug 08 2019] Activated alumina process is one of the most prevalently used adsorption methods for the defluoridation of drinking water.
The removal efficiency with activated alumina was found to be maximum up-to 98 percent and it required low operator skills.
The conventional activated alumina with ill-defined pore structures generally showed low adsorption capacities in a kinetically slow manner.
Defluoridation of water with a activated alumina: batch operations.
* Using activated alumina technology, both community and domestic defluoridation can be carried out.
However, they are not cheap: Countertop water distillers go for $200 and up, and an activated alumina defluoridation filter--most come in cartridge form and can be placed in-line under counters--are costly, too, and need to be changed out frequently.
If you wish to clear up your tap water from fluoride and chlorine, try reverse osmosis, distillation, or activated alumina filtration system.
Calculation of the Required Rate of Pollutant Removal by Air Cleaner/Filter Compound [C.sub.eriterion], R, [mu]g/h Q, cfm [F.sub.required], Name [mu]g/[m.sup.3] [mu]g/h Formaldehyde 33 (27.0 ppb) 24125.3 62.5 20620.9 Toluene 300 (79.0 ppb) 56413.5 62.5 24555.9 Sorbent media of activated carbon is selected for toluene removal, and activated alumina with potassium permanganate is selected for formaldehyde removal based on the sorption ability of the media.
Rigid cell filters are available utilizing granular activated carbon or a 50/50 blend of carbon and activated alumina impregnated with 5% potassium permanganate (Kmn[O.sup.4]).