Topic
Activated alumina
About: Activated alumina is a research topic. Over the lifetime, 1430 publications have been published within this topic receiving 31090 citations.
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TL;DR: In this article, three treatment technologies for removing arsenic from groundwater in Albuquerque, N.M., were compared: ion exchange (IX), iron hydroxide coagulation followed by microfiltration (C/MF), and activated alumina (AA) adsorption.
Abstract: Three treatment technologies for removing arsenic from groundwater in Albuquerque, N.M., were compared: ion exchange (IX), iron hydroxide coagulation followed by microfiltration (C/MF), and activated alumina (AA) adsorption. For an 8,700-m 3 /d (2.3-mgd) arsenic treatment facility, capital costs of the three processes were similar: $5.2 million, $4.1 million, and $4.6 million, respectively. Annual operations and maintenance costs were $447,000, $273,000 and $444,000, respectively. The principal differences were the result of large salt requirements for the IX process and the need to reduce the pH to 6 for AA adsorption, followed by base addition to stabilize the water. The C/MF system was selected for a demonstration facility in Albuquerque.
95 citations
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TL;DR: Since 1997, over 135 well-head arsenic removal units have been installed in remote villages in the Indian state of West Bengal bordering Bangladesh, and every component of the arsenic removal treatment system including activated alumina sorbent is procured indigenously.
95 citations
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19 Jun 1995TL;DR: In this article, a catalytic material consisting of ceria and activated alumina with a surface area of at least 10 m2 /g was proposed for pollution abatement of exhausts contianing unburned fuel or oil.
Abstract: Oxidation catalyst compositions include a catalytic material containing ceria and alumina each having a surface area of at least about 10 m2 /g, for example, ceria and activated alumina in a weight ratio of from about 1.5:1 to 1:1.5. Optionally, platinum may be included in the catalytic material in amounts which are sufficient to promote gas phase oxidation of CO and HC but which are limited to preclude excessive oxidation of SO2 to SO3. Alternatively, palladium in any desired amount may be included in the catalytic material. The catalyst compositions have utility as oxidation catalysts for pollution abatement of exhausts contianing unburned fuel or oil. For example, the catalyst compositions may be used in a method to treat diesel engine exhaust by contacting the hot exhaust with the catalyst composition to promote the oxidation of the volatile organic fraction component of particulates in the exhaust.
93 citations
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TL;DR: Activated alumina catalyst has a strong influence on the Miscanthusxgiganteus pyrolysis product and conversion yield and the catalytic bio-oils obtained were examined using elemental analysis, column chromatography, Fourier transform infrared (FTIR) and nuclear magnetic resonance (1H NMR) spectroscopy methods.
92 citations
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TL;DR: In this article, Boron removal from aqueous solutions was investigated using activated alumina, and experiments were conducted to delineate the effect of stirring time, pH, adsorbent dose and boron concentration.
91 citations