The present work deals with the fractional crystallization of salts from seawater. New experimental data for sequence and liquid phase ion molalities aqueous model solutions that contain major seawater components are presented. For describing studied electrolyte solutions, Pitzer was used parameters adopted literature. This fluid property combined an equilibrium crystallization. comparison simu...

The solubility of CO2 in the primary, secondary, tertiary and sterically hindered amine aqueous solutions at various conditions was studied. In the present work, the Modified Kent-Eisenberg (M-KE), the Extended Debye-Hückel (E-DH) and the Pitzer models were employed to study the solubility of CO2 in amine aqueous solutions. Two explicit equations are presented to evalu...

Most of the speciation models of aqueous electrolyte systems are based on the “ion pairing and complexing approach”. They are only suitable for aqueous solutions with ionic strengths lower than about 1 eq.kgw . For highly saline solutions, an approach based on “specific-ion interactions” (the so-called “Pitzer approach”) provides much more accurate results. Various thermodynamic databases suppo...

an extended peng-robinson equation of state (epr-eos) is used to model the vapor-liquid equilibrium (vle) in systems containing (water + nacl + co2), (water + methanol + nacl + co2), (water + na2so4 + co2) and (water + nh4cl + co2). the binary and ternary interaction parameters between salt and solvent are adjusted to experimental mean solvent activity of salts (nacl and na2so4). for the system...

We report our continued progress on the development of a thermochemical model of aluminum silicate mineral solubilities in aqueous solutions containing H, Na, K, Al, Cl, Si(OH)4, SiO(OH)3 , OH, Al(OH), Al(OH)2 , Al(OH)3 , Al(OH)4 − as a function of pH to high salt concentrations (I ≤ 5 m). Prior conference proceedings outlined our progress in developing an accurate model for the potassium free ...

Thresher R e p o r t e r Baker master Carl R. Wischmeyer will resign his college post a t the end of the spring semester to become director of a new Office of Continuing Studies, said University President Kenneth Pitzer in a surprise announcement last night at the annual Baker Night dinner. No choice has been made on a replacement as Baker master , Pitzer said. The new office will organize inte...

In their seminal paper of 1923, Debye and Hückel provided the first appropriate description effect ionic strength on thermodynamic properties dilute electrolyte solutions. This landmark work paved way for what was later called primitive model electrolytes. At this level, an solution is modeled as a collection charged hard spheres in dielectric continuum that manifests itself only through its co...

By SUSAN BRIDGES Thresher Editorial Staff University President K. S. Pitzer today dismissed Hugh Rice Kelly's appeal fo r hearing toy an impartial cqmmittee in the case of disciplinary action taken against him. Pitzer did this by confirming the action of Dean of Students S. W. Higginbotham in placing Kelly on probation and removing him f rom the editorship of the Thresher. He stated in a let te...

A synthetic Topopah Spring Tuff water representative of one type of pore water at Yucca Mountain, NV was evaporated at 95 °C in a series of experiments to determine the geochemical controls for brines that may form on, and possibly impact upon the long-term integrity of waste containers and drip shields at the designated high-level, nuclear-waste repository. Solution chemistry, condensed vapor ...