'Nanoprospecting' project seeks to reveal impacts of nanomaterials

September 19, 2013

Growing use of nanomaterials in manufactured products is heightening concerns about their potential environmental impact – particularly in water resources.

Tiny amounts of materials such as silver, titanium, silica and platinum are being used in fabrics, clothing, shampoos, toothpastes, tennis racquets and even food products to provide antibacterial protection, self-cleaning capability, food texture and other benefits. Natalia von Reitzenstein nanoprospecting project Download Full Image

Nanomaterials are also put into industrial polishing agents and catalysts, and are released into the environment when used.

As more of these products are used and disposed of, increasing amounts of the nanomaterials are accumulating in soils, waterways and water-systems facilities. That’s prompting efforts to devise more effective ways of monitoring the movement of the materials and assessing their potential threat to environmental safety and human health.

Three Arizona State University faculty members will lead a research project to help improve methods of gathering accurate information about the fate of the materials and predicting when, where and how they may pose a hazard.

Their “nanoprospecting” endeavor is supported by a recently awarded $300,000 grant from the National Science Foundation.

Paul Westerhoff is the lead investigator for the project. He will team with Pierre Herckes and Kiril Hristovski.

Westerhoff is the associate dean of research for ASU’s Ira A. Fulton Schools of Engineering and a professor in the School of Sustainable Engineering and the Built Environment.

Herckes is an associate professor in the Department of Chemistry and Biochemistry in ASU’s College of Liberal Arts and Sciences. Hristovski is an assistant professor in the Department of Engineering in the College of Technology and Innovation.

“We will be working to improve techniques for finding out what nanomaterials are out there in the environment, and what amounts are out there,” and how to determine under what conditions the materials might affect ecosystems, primarily aquatic systems, Westerhoff explains.

The effort will also include finding ways to extract nanomaterials from water and accurately measure the amounts of them in various kinds of waterways and water systems.

The research will be conducted as part of ASU’s Sustainable Water Initiative. Findings from the research will become part of the data archives of National Science Foundation’s Central Arizona-Phoenix Long-Term Ecological Research program at ASU.

The team will share results of the research with the public through the Center for Nanotechnology and Society at ASU.

The project grant will allow for a graduate student to assist in the research and participate in Science Outside the Lab, a two-week seminar in Washington, D.C. that explores how science and engineering research can shape public policy.

Joe Kullman

Science writer, Ira A. Fulton Schools of Engineering


Weinstein speaks at the IIT Chicago-Kent College of Law

September 19, 2013

Professor James Weinstein recently spoke about academic freedom and the First Amendment at the IIT Chicago-Kent College of Law, Illinois Institute of Technology. The Sept. 10 talk was part of the college’s colloquium series.

Weinstein, the Amelia Lewis Professor of Constitutional Law at the College of Law, has been a principal speaker at numerous national and international conferences on free speech issues. Download Full Image

His areas of academic interest are constitutional law, especially free speech, as well as jurisprudence and legal history. He has written numerous articles in law review symposia on a variety of free speech topics, including: free speech theory, obscenity doctrine, institutional review boards, commercial speech, database protection, campaign finance reform, the relationship between free speech and constitutional rights, hate crimes and campus speech codes.