Aqueous speciation of iron and manganese chlorides in supercritical hydrothermal solutions.
نویسندگان
چکیده
منابع مشابه
Thermodynamics and kinetics of ion speciation in supercritical aqueous solutions: a molecular-based study
Molecular simulation of infinitely dilute NaCl aqueous solutions are performed to study the NarCl ion Ž . pairing in a polarizable and a non-polarizable solvent at supercritical conditions. The simple point charge SPC , the Pettitt–Rossky and the Fumi–Tosi models for the water–water, the ion–water, and the ion–ion interactions are used in the determination of the degree of dissociation, its tem...
متن کاملVoltammetric Investigation of Hydrothermal Iron Speciation
Hydrothermal vent fluids are highly enriched in iron (Fe) compared to ambient seawater, and organic ligands may play a role in facilitating the transport of some hydrothermal Fe into the open ocean. This is important since Fe is a limiting micronutrient for primary production in large parts of the world’s surface ocean. We have investigated the concentration and speciation of Fe in several vent...
متن کاملSimulation of supercritical water and of supercritical aqueous solutions
Molecular dynamics (MD) calculations have been performed to determine equilibrium structure and properties of systems modeling supercritical (SC) water and SC aqueous solutions at two states near the critical point using the simple point charge (SPC) potential model of Berendsen et al. for water. Both thermodynamic and dielectric properties from the simulations for pure water are accurate in co...
متن کاملSpeciation in aqueous solutions of nitric acid.
In this study, speciation in aqueous solutions of nitric acid at 25 °C was assessed in two independent ways. First, Raman experiments were carried out and interpreted in terms of free nitrate ions, ion pairs and neutral HNO(3) molecules. In parallel, a model was developed to account for the formation of these two kinds of pairs. It was based on an extension of the binding mean spherical approxi...
متن کاملMolecular Simulation and Theory of Reactions in Supercritical Fluid Mixtures: Ionic Association in Supercritical Aqueous Solutions
Molecular simulation is a powerful tool for understanding and predicting thermophysical properties in systems both at equilibrium and away from equilibrium and composed of molecules ranging in complexity from spherically symmetric monatomic molecules to polymers. In recent years, our research group has applied molecular simulation to the study of supercritical aqueous solutions with the goal of...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: GEOCHEMICAL JOURNAL
سال: 1995
ISSN: 0016-7002
DOI: 10.2343/geochemj.29.175