GEOCThursday, 14 September 2006

9:00 AM-12:00 PM Moscone Center -- Room 262, Oral
The Structure and Reactivity of Nanoparticles in the Environment
Organizers:Benjamin Gilbert
John R. Bargar
9:00 AMStudy of bioweathering and nano-biominerals at the nanoscale in natural samples
Karim Benzerara, Nicolas Menguy, Kevin Lepot, Gordon E. Brown Jr.
9:30 AMNucleation and growth of nanoparticles on mineral surfaces: First environmental applications of grazing incidence small angle X-ray scattering
Young-Shin Jun, Glenn A. Waychunas, Michael F. Toney
9:50 AMRapid precipitation of amorphous silica in experimental systems with nontronite (NAu-1) and Shewanella oneidensis MR-1
Yoko Furukawa, S. Erin O'Reilly
10:10 AMIntermission
10:30 AMRole of microbial Mn oxide nanoparticles in Zn attenuation in mine-contaminated streams
Christopher C. Fuller, John R. Bargar, Yuji Arai, Samuel M. Webb, Myriam Perez De la Rosa
11:00 AMArsenate adsorption and desorption on magnetite nanoparticles: Effect of time and pH
Sujin Yean, Heather J. Shipley, Amy T. Kan, Mason B. Tomson
11:20 AMIdentification of natural bacteriogenic Mn oxides in sea water
Samuel M. Webb, Brian Clement, Brandy Toner, Sirine C. Fakra, Myriam Perez De la Rosa, John R. Bargar, Bradley M. Tebo
11:40 AMSize and structure of ferrihydrite from PDF analysis
F. Marc Michel, Sytle M. Antao, Aaron J. Celestian, Martin A Schoonen, John B. Parise, Gang Liu, Daniel R. Strongin, Peter L. Lee, Peter J. Chupas

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