August 16, 2007, 2:30 PM - 4:30 PM, EDT (18:30-20:30 GMT)

The NIEHS Superfund Basic Research Program (SBRP), in collaboration with the Environmental Protection Agency (EPA), presents "Fate and Transport of Engineered Nanomaterials." Nanotechnology involves the understanding and control of matter at dimensions of roughly 1 to 100 nanometers. While this emerging technology brings advanced products and scientific advances to humanity - including use for drug delivery and treatment - little is known about their fate in the environment or engineered treatment systems. This seminar will introduce some of the challenges and considerations in understanding the environmental fate and transport of engineered nanomaterials.

Dr. Richard G. Zepp, Senior Research Scientist at the U.S. Environmental Protection Agency, National Exposure Research Laboratory, Ecosystems Research Division will present "Factors Influencing Fate and Transport of Selected Nanomaterials in Water and Land." This presentation includes a brief review of factors that affect the transformation of nanomaterials under various environmental conditions. Because fullerenes such as buckminster fullerene (C60) and its derivatives and single wall nanotubes (SWNTs) are likely to be widely used and thus distributed in water and land, the talk will focus on this class of nanomaterials.

Dr. Paul Westerhoff, Professor of Civil and Environmental Engineering at Arizona State University (Tempe, AZ), will present "Nanoparticle Interactions During Wastewater and Water Treatment." Already society's residuals pass into the environment through more than 17,000 U.S. wastewater treatment systems; however, little scientific information is currently available on the fate of NPs in WWTPs, whether they are present in biosolids or effluent. Likewise the fate of NPs during water treatment is ill-defined. This presentation intends to provide data to fill these existing knowledge gaps.

Dr. Barry Dellinger (LSU-SBRP) will moderate. This is the sixth seminar in the Risk-e-Learning Series "Nanotechnology - Applications and Implications for Superfund." Previous seminars aired on CLU-IN January 18, 2007, February 13, 2007, March 15, 2007, April 19, 2007 & May 31, 2007; audio recordings are available through the CLU-IN archives.

• Dr. Richard G. Zepp, U.S. Environmental Protection Agency, National Exposure Research Laboratory, Ecosystems Research Division (Zepp.Richard@epa.gov)
• Paul Westerhoff, Ph.D., PE, Civil and Environmental Engineering at Arizona State University (Tempe, AZ) (p.westerhoff@asu.edu)

• Dr. Barry Dellinger, Louisiana State University, Superfund Basic Research Program (barryd@lsu.edu)
• Larry Whitson, National Institutes of Health, National Institute of Environmental Health Sciences Contractor, MDB, Inc (whitson@niehs.nih.gov)

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