Hannover 2003 – wissenschaftliches Programm

Bereiche | Tage | Auswahl | Suche | Downloads | Hilfe

UP: Umweltphysik

UP 7: Hydrosphäre, Bodenphysik, Umwelt und Gesellschaft

UP 7.4: Vortrag

Freitag, 28. März 2003, 12:30–12:45, F 442

Electric potential and reaction rates at charged surfaces in asymmetric electrolytes - comparison between experiment and a novel theory — •H. Lustfeld1 and A. Pohlmeier21Forschungszentrum Jülich, IFF, 52425 Jülich — 2Forschungszentrum Jülich, ICG IV, 52425 Jülich

The electric potential and reaction rates of ions hitting the chemically active surface of microcrystals in an asymmetric electrolyte are computed analytically using a novel theory*). Comparison with this theory is made experimentally by measuring the reaction rates of Pb2+ and Cd2+ at the surface of goethite microcrystals suspended in aqueous solution of NaNO3. The measurements were taken over a wide range of temperature and pH values. The agreement between theory and experiment is very satisfactory in all cases. *)H. Lustfeld, A. Pohlmeier, J.Colloid Interface Sci 181, 45 (2001)

100% | Mobil-Ansicht | English Version | Kontakt/Impressum/Datenschutz
DPG-Physik > DPG-Verhandlungen > 2003 > Hannover