Methods for removing reduced sulfur compounds, such as hydrogen sulfide, from fluids employing a ferric iron salt that exhibits unusually high solubility in aqueous, alkaline solutions and has strong affinity for capture and oxidation of reduced sulfur compounds. Alkaline aqueous ferric iron salt and solutions thereof useful for removing reduced sulfur compounds from fluids and various methods of production of such salts and solutions. In addition, methods of regenerating the alkaline aqueous ferric iron salt solutions after capture of hydrogen sulfide or other reduced sulfur compounds, generally by exposure to oxygen in air. The alkali metal carbonate salt preferably comprises potassium carbonate and/or potassium bicarbonate. The alkaline aqueous ferric iron salt solutions generally comprise ferric ions, potassium ions, carbonate ions, and bicarbonate ions, optionally with one or more organic additives. In addition, aqueous-soluble, ferric iron salts and ferric iron containing solids prepared by removal of aqueous medium from solutions herein.

An anesthetic circuit is provided for treating a patient. The anesthetic circuit includes a membrane having a plurality of hollow fibers. Also provided is a fluid separation apparatus connectable to an anesthetic circuit. In a further embodiment, a method is provided for anesthetic treatment of a patient.

The present invention relates to a process for producing sodium bicarbonate crystals. Sodium carbonate derived from TRONA ore is mixed with a treated mother liquor produced in a downstream process to form a sodium carbonate solution. The sodium carbonate solution is subjected to a crystallization process that produces sodium bicarbonate crystals. The sodium bicarbonate crystals are separated from the sodium carbonate solution to form a mother liquor that includes silica. To remove the silica in the mother liquor, the mother liquor is directed to a reactor where an aluminum salt is mixed with the mother liquor to precipitate hydrous aluminum oxide which adsorbs silica thereon. The hydrous aluminum oxide with adsorbed silica is removed from the mother liquor. This produces the treated mother liquor that is mixed with the sodium carbonate and which forms the sodium carbonate solutions.

A humidity control device includes: a storage unit that stores hygroscopic liquid that contains a hygroscopic substance; a vent that is provided in the storage unit; absorption means by which air and the hygroscopic liquid are brought into contact with each other and moisture contained in the air is absorbed by the hygroscopic liquid; an ultrasonic wave generation unit that irradiates at least a part of the hygroscopic liquid, which has absorbed the moisture, with an ultrasonic wave; and removal means by which an atomized droplet that is generated is removed from the hygroscopic liquid that has absorbed the moisture, in which the storage unit suppresses an outflow of a coarse droplet whose particle size is larger than that of the atomized droplet.

Carbon dioxide removal using lithium borate is generally described.

An atmospheric water harvesting material includes a deliquescent salt, a photothermal agent, and a polymeric hydrogel matrix containing the deliquescent salt and photothermal agent.

An atmospheric water harvesting material includes a deliquescent salt, a photothermal agent, and a polymeric hydrogel matrix containing the deliquescent salt and photothermal agent.

An adsorbent breather assembly for filtering contaminants such as particulars and vapor phase contaminants, e.g. volatile organic compounds, for use with electronic devices can include a blocking region adjacent to the adsorbent filter layer to improve filtering performance.

Provided are sorbents and associated methods and systems for removing mercury from process gases or fluid streams. The sorbents may include activated carbon and pyrite. The sorbents may optionally include one or more additives, such as a halide salt.

Methods for treating an industrial byproduct, such as spent, granular, activated carbon, dredge spoils, or contaminated soils involve integrated steps to clean, concentrate, separate and/or otherwise collect hazardous and/or desired materials from such industrial byproducts. The cleaned, concentrated, separated, or collected materials may involve sufficient quantities to be useful to subsequent processors, raw materials, additives, and the like. Other treatment methods involve retaining the clean material stream at sufficient temperatures for sufficient time to separate and concentrate desired material for recovery therefrom, such as precious metals and rare earth elements.