Patent
Composition and process for removing arsenic and selenium from aqueous solution
TLDR
In this article, a new composition and process for lanthanum oxide concentrate that is used to significantly reduce arsenic and/or selenium concentration levels in aqueous solutions is described.Abstract:
The invention is a new composition and process for lanthanum oxide concentrate that is used to significantly reduce arsenic and/or selenium concentration levels in aqueous solutions. The lanthanum oxide concentrate is a mixture of lanthanum oxide and one or more oxides from the following group: neodymium oxide, cerium oxide, parseodymiun oxide, strontium oxide, calcium oxide and sodium oxide. The process of manufacture comprises the steps of sintering the lanthanum oxide concentrate, then washing the resultant media. The process of use is the contact of the lanthanum oxide concentrate with an aqueous solution containing arsenic and/or selenium whereby the lanthanum oxide concentrate removes at least a portion of the arsenic and/or selenium from the aqueous solution.read more
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Apparatus and process for treating an aqueous solution containing biological contaminants
John L Burba,Oriard Tim L +1 more
TL;DR: In this article, the authors describe a process for treating an aqueous solution containing biological contaminants with an aggregate composition comprising an insoluble rare earth-containing compound to form a solution depleted of active biological contaminants.
Patent
Use of a dual polymer system for enhanced water recovery and improved separation of suspended solids and other substances from an aqueous media
TL;DR: In this article, anionic and cationic polymers are added to aqueous media for removal of substances in order to create large and cohesive fibrillar aggregates that exhibit high solids to liquid ratios.
Patent
Target material removal using rare earth metals
John L. Burba,Carl R. Hassler,Charles F. Whitehead,Joseph A. Lupo,Brock Conrad O'kelley,Robert Cable,Joseph R. Pascoe,Brandt Wright +7 more
TL;DR: In this article, the removal of one or more selected target materials from various streams using a rare earth metal-containing fixing agent is described. But the present paper is not directed to the extraction of target materials.
Patent
Process for removing arsenic from aqueous streams
TL;DR: Arsenic removal from water and other aqueous feeds by treating the feed with a compound containing cerium in the +4 oxidation state, preferably cerium dioxide, was discussed in this article.
Patent
Composition and process for making the composition
TL;DR: In this article, an aggregate composition consisting of one or more cerium oxides, the polymer binder and optionally a flow aid is presented. And a process for making the aggregate composition includes mixing the insoluble rare earth-containing compound with a polymeric binder to form a mixture, and subjecting the mixture to mechanical, chemical and/or thermal treatment to adhere the rare earth compound to the polymers.
References
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Patent
Process for removal of selenium and arsenic from aqueous streams
TL;DR: In this paper, a process for removing selenium and/or arsenic from aqueous streams including industrial process waters and drinking water is provided comprising contacting the stream with a composition comprising lanthanum oxide whereby seenium and or arsenic are adsorbed.
Patent
Removal of heavy metals, especially lead, from aqueous systems containing competing ions utilizing amorphous tin and titanium silicates
TL;DR: In this article, a process for the removal of heavy metals such as lead, cadmium, zinc, chromium, arsenic and mercury from aqueous solutions containing one or more of said metals as well as competing ions such as calcium and/or magnesium by contacting amorphous titanium or tin silicates is disclosed.
Patent
Sintered ceramic product
TL;DR: In this article, a sintered ceria/zirconia ceramic and a method of making it is described, which involves heating an artifact comprising said mixture to a temperature in the range 1200°-1700° C.
Patent
Lanthanide ceramic material
TL;DR: In this article, a lanthanide oxide ceramic material is provided having the general formula La a Ln b M'c M"d O3 -delta, in which Ln is a combination of Ce, Pr and Nd; M' is at least one alkaline earth metal; M" is selected from the group consisting of Co, Fe, Ni, Zn, etc.