Grantee Research Project Results
2009 Progress Report: Platinum-Containing Nanomaterials: Sources, Speciation, and Toxicity in the Environment
EPA Grant Number: R833892Title: Platinum-Containing Nanomaterials: Sources, Speciation, and Toxicity in the Environment
Investigators: Schauer, James J. , Toner, Brandy M. , Shafer, Martin M.
Institution: University of Wisconsin - Madison , University of Minnesota
EPA Project Officer: Aja, Hayley
Project Period: February 1, 2009 through January 31, 2013
Project Period Covered by this Report: February 1, 2009 through January 31,2010
Project Amount: $399,406
RFA: Exploratory Research: Nanotechnology Research Grants Investigating Fate, Transport, Transformation, and Exposure of Engineered Nanomaterials: A Joint Research Solicitation - EPA, NSF, & DOE (2007) RFA Text | Recipients Lists
Research Category: Nanotechnology , Safer Chemicals
Objective:
Progress Summary:
1. sXAS and chemical speciation results indicate the presence of a large component of oxidized species of platinum (particularly Pt(IV)-oxide) in emissions from diesel engines burning platinum-amended fuel.
2. sXAS studies of used automobile three-way-catalysts provide strong support for the presence of oxidized platinum species along with preliminary evidence for chloroplatinates at levels of several percent of total platinum.
4. Significant progress was made in developing a method for speciating chloroplatinates in extracts of source and receptor particulates.
Future Activities:
- Roadside Aerosol Sampling & Characterization
- Urban Ambient Aerosol Sampling & Characterization
References:
- Nachtigall, D.; Artelt, S.; Wunsch, G. J. Chromatogr. A. 775 (1997) 197-210.
- Nischwitz, V.; Michalke, B.; Kettrup, A. J. Chromatogr. A. 1016 (2003) 223.
- Nischwitz, V.; Michalke, B.; Kettrup,A. Anal. Chim. Acta. 521 (2004) 87-93.
Journal Articles:
No journal articles submitted with this report: View all 7 publications for this projectSupplemental Keywords:
platinum, speciation, environment, aerosol, chloroplatinate, transformation, synchrotron XAS, physiological extractionProgress and Final Reports:
Original AbstractThe perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoints of the principal investigator and may not represent the views and policies of ORD and EPA. Conclusions drawn by the principal investigators have not been reviewed by the Agency.