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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Patent•
19 Jan 2013
TL;DR: In this paper, a desiccant-based honeycomb chemical filter is proposed, consisting of a matrix formed of a substrate having a desicant generated in situ or deposited thereon, the selected desiccants being selected from the group consisting of metal silicates, silica gel, molecular sieves, activated alumina, activated carbon or hydrophobic zeolite, and any mixture thereof.
Abstract: The present invention provides a desiccant based honeycomb chemical filter comprising a matrix formed of a substrate having a desiccant generated in situ or deposited thereon, said desiccant being selected from the group consisting of metal silicates, silica gel, molecular sieves, activated alumina, activated carbon or hydrophobic zeolite, and any mixture thereof, said substrate being further impregnated with one or more of an oxidizing agent, or an alkali metal hydroxide, or strong or weak acid(s), or reducing agents.
8 citations
TL;DR: In this article, the authors evaluated the ability of passive flux meters (PFM) to estimate arsenic in groundwater using activated alumina, which displayed a Freundlich adsorption isotherm with respect to arsenic in solution.
8 citations
TL;DR: In this paper, a new adsorption process for the removal of As(V) ion from aqueous solutions is studied using lanthanum-loaded zeolite, which functions with a wide range of pH (2-8).
Abstract: A new adsorption process for the removal of As(V) ion from aqueous solutions is studied in this paper using lanthanum-loaded zeolite. The removal efficiency of different adsorbents, activated alumina and activated carbon are obtained in the study for comparison. The results show that lanthanum-loaded zeolite is an effective adsorbent for the removal of As(V) from aqueous solutions. Then, the pH effect and regeneration of modified zeolite on the As(V) removing efficiency are also assessed. It functions with a wide range of pH (2–8). After adsorption, zeolite adsorbed with As(V) ions can be regenerated successfully with 1M NaOH. Based on the data obtained, an adsorption mechanism and the possible complex structure are tentatively presented. Compare to other adsorbents, easy availability of this adsorbent, excellent adsorption capacity, wide optimum pH range, and regeneration are expected to be utilized in practical operations.
8 citations
Patent•
13 Mar 1972
TL;DR: The shrinkage of organic plastics can be controlled by incorporating an admixture of solid particulate gas carriers, such as fluid coke, activated alumina, activated bauxite, silica gel, and delayed coke as discussed by the authors.
Abstract: The shrinkage of organic plastics, such as polyepoxies and polyesters, can be controlled by incorporating therein an admixture of solid particulate gas carriers, such as fluid coke, activated alumina, activated bauxite, silica gel, and delayed coke.
8 citations
TL;DR: In this paper, modified nanoporous membranes on centrifugal microfluidic platforms are developed for detecting heavy metal ions with high selectivity by detecting chemiluminescence (CL) reaction.
Abstract: The modified nanoporous membranes on centrifugal microfluidic platforms are developed for detecting heavy metal ions with high selectivity. The nanomaterials of polyrhodanine, activated alumina and activated carbon are deposited on nanoporous anodic aluminium oxide (AAO) membranes for enhancing filtration to remove ions of lead (Pb(II)), arsenic (As(III)) and cadmium (Cd(II)) from aqueous solution. By detecting chemiluminescence (CL) reaction, the concentrations of heavy metal ions can be obtained. A pneumatic-and-centrifugal microfluidic detection system was used to perform microfluid separation and CL detection for measuring selected ions concentration. The removal efficiency of 92, 82 and 78% were observed for Pb(II), As(III) and Cd(II) ions, respectively. The removal rate is performed up to 70% for mixed ions filtration by a sequence of multi-modified AAO membranes. The modified nanofiltration films on microfluid platform have potential applications in removing heavy metal ions from water, soi...
8 citations