Competitive adsorption of Ca2+ and Zn(II) ions at monodispersed SiO2/electrolyte solution interface |
| |
Authors: | Janusz Władysław Patkowski Jacek Chibowski Stanisław |
| |
Institution: | Department of Radiochemistry and Colloid Chemistry, Maria Curie-Sk?odowska University, Pl. M.C. Sk?odowskiej 3, 20-031, Lublin, Poland. wjanusz@hermes.umcs.lublin.pl |
| |
Abstract: | A study of competitive adsorption of Ca(2+) and Zn(II) ions at the monodispersed SiO(2)/electrolyte solution interface is presented. Influence of ionic strength, pH, and presence of other ions on adsorption of Ca(2+) and Zn(II) in the mentioned system are investigated. zeta potential, surface charge density, adsorption density, pH(50%), and DeltapH(10-90%) parameters for different concentrations of carrying electrolyte and adsorbed ions are also presented. A high concentration of zinc ions shifts the adsorption edge of Ca(2+) ions adsorbed from solutions with a low initial concentration at the SiO(2)/NaClO(4) solution interface to the higher pH values. This effect disappears with a concentration increase of calcium ions. The presence of Ca(2+) ions in the system slightly affects the adsorption of zinc ions on SiO(2), shifting the adsorption edge toward lower pH values and thereby increasing the adsorption slope. |
| |
Keywords: | |
本文献已被 PubMed 等数据库收录! |
|