RES³T - Rossendorf Expert System for Surface and Sorption Thermodynamics

Paper Details


Bibliographic Data:

Code: B92b
Paper Type: Article
Author(s): Brady PV
Title: Silica surface chemistry at elevated temperatures
Journal: Geochimica et Cosmochimica Acta
Volume: 56   Year: 1992   Pages: 2941-2946
ISSN-Print: 0016-7037; 0016-1258
Internal Storage: V1238
DOI: 10.1016/0016-7037(92)90371-O
Abstract:

Potentiometric titrations of SiO2 surfaces at 25 and 60°C indicate that SiO2 surface chemistry is sensitive to temperature. The number of negatively charged surface sites becomes more pH dependent at T > 25°C. Metal binding constants for Cd++ and Pb++, calculated with a constant capacitance model, increase by between 0.3 and 2 orders of magnitude between 25°C and 60°C. This parallels temperature-dependent changes in the association constants for the respective metal hydrolysis constants.
Comment: cited in [SS97a], temperature dependence of SSD

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