Suitable single crystals of the title compound, barium dicobalt(II) bis-[orthoarsenate(V)], were prepared under hydro-thermal conditions. This phase belongs to a series of compounds with general formula AM(2)(XO(4))(2), where A = alkaline earth metal, M = Mg or a divalent first-row transition element, and X = P, As or V. BaCo(2)(AsO(4))(2) is isotypic with BaNi(2)(XO(4))(2) (X = P, V or As) and...

Layered double hydroxide (LDH) compounds are characterized by structures in which layers with a brucite-like structure carry a net positive charge, usually due to the partial substitution of trivalent octahedrally coordinated cations for divalent cations, giving a general layer formula [(M 1 xM 3+ x)(OH)2] . This positive charge is balanced by anions which are intercalated between the layers. I...

The dissolution of magnesium (Mg) and silicon (Si) from various samples of chrysotile asbestos was measured in N HCl at 25 degrees C. Nine samples were used, five from Canada and four from the Coalinga deposit in California. With milled samples from Quebec, the fraction of Mg dissolving was linearly related to the square root of the leaching time until at least 65% had dissolved. With a hand-pi...

The work assesses the availability and localizations of different raw materials suitable for ocean alkalinity enhancement (OAE), like limestone, olivine, magnesite brucite, since several billion tons rocky are needed to achieve meaningful results carbon sequestration through OAE. Resources carbonates immense widespread around all continents. Availability pure is still very large (outcrop area 4...

Abstract This paper presents the results of wastewater treatment at a mining enterprise developing complex ore deposit in Murmansk region, Russia. The main pollutants are sulfate, manganese, and strontium. For this treatment, two-stage scheme was proposed tested using two sorbents (at pH 6): an aminated peat biosorbent to remove sulfate commercial sorbent based on mineral brucite metals. Optima...