Activated Alumina (Al2O3) is an aluminum oxide material commonly used as an adsorbent and desiccant, with its microporous channels providing strong absorption forces against water, oxides, acetic acid and bases. As depth dehydration desiccants it delivers excellent depth dehydration performance without heat regeneration requirements.
Water Filtration
Activated alumina is a highly porous form of aluminum oxide, offering various uses due to its selectivity and adsorption capacities. Common applications of activated alumina include acting as an adsorbent, water purifier and desiccant. En outre, activated alumina serves as a catalyst carrier in chemical reactions; additionally it’s tasteless, odorless and non-toxic – perfect for repeated use!
Home water filtration is one of the primary uses for activated alumina. It is effective at filtering out contaminants like fluoride from drinking water, which has been found to pose serious harm to children’s development and cause many other issues – including dental fluorosis.
An activated alumina device typically consists of a bed of granules that filters water. As water flows through, contaminant molecules attach themselves to the alumina particles in the filter bed and can then be flushed away with treated water, significantly decreasing contaminant concentration in the treated water and decreasing overall risk.
Activated alumina can be used both to reduce arsenic in groundwater and as a remediation product, making it an invaluable asset in site clean-up applications where metals such as arsenic, copper, zinc, silica and lead need to be reduced. En outre, its iron enhanced activated activated alumina is NSF/ANSI 61 listed and meets BAT (Best Available Technology) requirements for arsenic removal from fluorides; additionally it features special acid wash treatments designed to lower internal pH further improving performance against arsenic fluorides reduction; finally it can even be disposed of via California WET regulations or landfill disposal due to passing both tests!
Fluoride Filtration
Fluoride, an essential mineral found naturally in many rocks and minerals, has long been added to public water supplies by municipalities for various reasons, including to reduce tooth decay. While many find the addition to be uncomfortable, others use filters specifically designed to filter fluoride out. One effective choice for doing so is activated alumina; its effectiveness makes it an excellent fluoride removal filter option.
Filters that use granular activated alumina typically reduce fluoride levels to below 1 PPM, much lower than most residential water supplies release into their systems and providing significant improvements in tap water quality for homes.
Though carbon filters may also be used to remove fluoride, their effectiveness may not be as great due to chlorine’s dissolution in fluoride environments quickly compared with other filtration methods. Therefore, for maximum fluoride removal potential carbon filters require longer residence times in their filters compared with traditional approaches.
Reverse osmosis systems provide an effective and affordable means of eliminating fluoride from tap water. By pushing water through a permeable membrane under pressure, reverse osmosis filters can efficiently eliminate minerals like fluoride as well as pesticides, lead, cysts and other contaminants from their source water supply.
Réactions chimiques
Due to its adsorbent and desiccant properties, activated alumina is widely utilized in various chemical reactions. Its primary applications are as a Claus catalyst in sulfur recovery processes at oil and gas refineries as well as desiccant for extracting moisture vapor from industrial gases; additionally it can be thermally treated and recycled after its use has passed.
Activated alumina (Al2O3) is an inert solid compound composed of aluminum oxide (Al2O3) that poses no danger to humans or animals and only mildly irritating to the skin or eyes after prolonged exposure. En outre, activated alumina is biocompatible and often found in dental ceramics.
This material does not fall within the reporting requirements of TSCA Section 12b or 40 CFR Part 373, nor are any chemicals known to cause cancer or reproductive toxicity, and no class 1 ozone depletors. This SDS was produced by its supplier using the UL SDS template; no independent testing by UL has taken place and UL disclaims all liability in its use; furthermore, none of this information herein comes directly from publicly available regulatory data sources.
Oil Adsorption
Oil adsorption with activated alumina is an efficient and cost-effective method. The adsorption process takes place within the porous structure of the alumina, where surfactant molecules become trapped and bound via electrostatic interactions to its surface, leading to micelle-like aggregate formation which can trap large quantities of surfactant molecules and be held securely by it.
This research focused on the adsorption of sodium dodecyl sulfate (SDS) and sodium tetradecyl sulfate (STS) onto g-Al2O3 by studying their contact times, pH 4, concentration of NaCl (1mM), isotherms fitting well with two-step models and the concentration of ions present which decreased repulsive forces between head groups thus permitting more surfactant to attach itself onto alumina surfaces. Adsorption was determined optimal for SDS and STS with contact times 180 min at pH 4, pH 4, 1mM NaCl. Isotherms fit well with two-step models and their isotherms fitting well with two step models allowing an increase with increasing concentration due to decrease of repulsive forces between head groups of an ionic surfactant and its subsequent increased adhesion onto surfaces g-Al2O3.
Fourier-transform infrared spectroscopy was employed to monitor changes to functional groups on the surface of alumina after SDS and STS adsorption, with results showing it modified by surfactant molecules. Results also reveal that it primarily adsorbed long alkyl chains of SDS molecules while STS molecules held stronger interactions due to stronger interactions.