Effects of siderophores on metal adsorption to clays

GEOC 67

Patricia A. Maurice, pmaurice@nd.edu1, Elizabeth A. Haack1, Bhoopesh Mishra, bmishra@princeton.edu2, and Bruce A Bunker3. (1) Department of Civil Engineering and Geological Sciences, University of Notre Dame, 156 Fitzpatrick Hall, South Bend, IN 46556, (2) Department of Geosciences, Princeton University, B80 Guyot Hall, Washington Road, Princeton, NJ 08544, (3) Department of Physics, University of Notre Dame, Notre Dame, IN 46556
Gary Sposito's group has been at the forefront of investigating how siderophores, which are low molecular weight ligands produced by aerobic bacteria to acquire Fe, may affect metal fate and transport. Building upon his pathbreaking work, our group is combining adsorption experiments with XAS-based techniques to investigate the effects of siderophores on adsorption of Cd, Pb, and U to clay mineral surfaces. The results show that siderophores may either enhance or inhibit adsorption of metals to clay mineral surfaces. Overall, the results further our understanding of the complex roles of bacteria in metal mobility in the subsurface.
 

Physical Chemistry of Soil and Aquifer Systems: A Symposium in Honor of Garrison Sposito
8:15 AM-11:55 AM, Monday, 11 September 2006 Moscone Center -- Room 256, Oral

Division of Geochemistry

The 232nd ACS National Meeting, San Francisco, CA, September 10-14, 2006