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Characterization of ternary surface complexes of lead chloride on hematite in dependence of temperature and salinity – experimental versus modeled data

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/persons/resource/dejene

Driba,  Dejene Legesse
ICGR International Center for Geothermal Research, Geoengineering Centres, GFZ Publication Database, Deutsches GeoForschungsZentrum;

/persons/resource/regens

Regenspurg,  Simona
ICGR International Center for Geothermal Research, Geoengineering Centres, GFZ Publication Database, Deutsches GeoForschungsZentrum;

/persons/resource/delucia

De Lucia,  Marco
5.3 Hydrogeology, 5.0 Earth Surface Processes, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum;

/persons/resource/pfeif

Pfeiffer,  Stefan
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Citation

Driba, D. L., Regenspurg, S., De Lucia, M., Pfeiffer, S. (2013): Characterization of ternary surface complexes of lead chloride on hematite in dependence of temperature and salinity – experimental versus modeled data. - Mineralogical Magazine - Goldschmidt Conference Abstracts, 77, 5, 1009-1009.
https://doi.org/10.1180/minmag.2013.077.5.4


Cite as: https://gfzpublic.gfz-potsdam.de/pubman/item/item_247911
Abstract
Adsorption of aqueous metal cations onto mineral surfaces can affect metal speciation and mobility in a range of geologic systems. In order to accurately model metal speciation and transport on iron-oxides, the effect of pH, temperature and ionic strength on its adsorption property and stability constants must be determined. The surface complex modeling approach CD-MUSIC (chargedistribution multi-site complexation) requires the definition of many parameters including equilibrium constants for protonation and deprotonation, metal sorption and back ground electrolyte sorption reactions etc. However, the lack of many of those parameter particularly for Pb adsorption onto hematite surface requires the implementation of experimentally determined data.