Session: Chemistry of Metals in Terrestrial and Aquatic Systems


GEOC		Monday, March 29, 2004

8:10 AM-11:30 AM Marriott -- Marquis NE, Oral
Chemistry of Metals in Terrestrial and Aquatic Systems
Dissolution/Precipitation
Organizer, Presidings:	Stephan Kraemer Bernd Nowack
8:10 AM		Introductory Remarks
8:15 AM	19	Overlooked role of thioanions in sulfide-promoted metal solubility in nature George R. Helz, Carla S. Neuberger
8:55 AM	20	Introduction of a new in situ method to follow reactions of minerals under environmental conditions Andreas Birkefeld, Bernd Nowack, Rainer Schulin
9:15 AM	21	Dissolution and precipitation rates of the lead phosphate mineral pyromorphite Liyun Xie, Claire E. Farnsworth, Daniel E. Giammar
9:35 AM	22	Inhibitory effect of chromate sorption on the oxidative dissolution of Cr(OH)₃ Giehyeon Lee, Janet G. Hering
9:55 AM		Intermission
10:10 AM	23	Siderophore promoted dissolution of uranium(IV)oxide Scott W. Frazier, Ruben Kretzschmar, Stephan Kraemer
10:30 AM	24	Thermodynamic and kinetic controls on naturally-occurring arsenic contamination in groundwaters of the Fox River Valley, Eastern Wisconsin, USA Nita Sahai, Katie Thornberg
10:50 AM	25	Kinetics of metal-arsenate precipitate formation at the goethite-water interface Markus Grafe, Michael J. Borda, Donald L. Sparks
11:10 AM	26	Kinetics of nickel precipitate formation in soils Edward Peltier, D. L. Sparks

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