A Four-Component Model for Small Colloidal Particles in an Aqueous Electrolyte
نویسندگان
چکیده
Small colloids in a uni-univalent aqueous electrolyte are modeled by a four-component solvent primitive model. The symmetric Poisson-Boltzmann theory is used to analyze the system and to calculate the second virial coefficient B2 of very dilute particle suspensions for varying solute and solvent concentrations. The results are compared with some experimental results on B2 of the silicotungstate anion suspension in an alkali halide solution.
منابع مشابه
Electrostatic interaction between colloidal particles trapped at an electrolyte interface.
The electrostatic interaction between colloidal particles trapped at the interface between two immiscible electrolyte solutions is studied in the limit of small inter-particle distances. Within an appropriate model analytic expressions for the electrostatic potential as well as for the surface and line interaction energies are obtained. They demonstrate that the widely used superposition approx...
متن کاملAn Evaluation of Four Electrolyte Models for the Prediction of Thermodynamic Properties of Aqueous Electrolyte Solutions
In this work, the performance of four electrolyte models for prediction the osmotic and activity coefficients of different aqueous salt solutions at 298 K, atmospheric pressure and in a wide range of concentrations are evaluated. In two of these models, (electrolyte Non-Random Two-Liquid e-NRTL and Mean Spherical Approximation-Non-Random Two-Liquid MSA-NRTL), association between ions of opposit...
متن کاملPolymerization of Silica in Water-Effect of Ultrasonic Waves on Coagulation and Sedimentation
Polymerization rates of silica at various concentrations and pHs have been studied via nephelometry. The ability and potency of ultrasonic radiation on the coagulation process in aqueous samples with and without silica colloidal particles have been extensively investigated. Factors affecting the rate and filtration volume such as silica concentration, time of radiation, temperature, and fre...
متن کاملRemoval of Heavy Metal Particles by LTJ, ANA, SVR, BEC and MER zeolites particles: A Molecular Dynamics Simulation Study
In present study, molecular dynamics simulation of Cadmium (II), Lead (II) and Copper (II) removal from aqueous electrolyte solutions using the ion-exchange process with the zeolite particles was done. The results showed that, most of the particles had the highest affinity of ion exchanging with Lead (II) and the lowest affinity with Copper (II). The calculated mean ion-exchange ratios showed t...
متن کاملKinetics of Deposition of Colloidal Metal Oxide Particles on a Steel Surface * ' 1
The deposition of spherical a-Fe20 3 and rod-like B-FeOOH. particles on steel from aqueous dispersions of different pH and ionic strength using a packed column technique has been studied. A procedure was developed by which the coagulation of the suspended particles was minimized even in the presence of high electrolyte concentrations during the duration of an experiment. In the absence of the p...
متن کامل