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UF researchers look for ways to make an emerging technology safe for environment
Date:3/21/2012

GAINESVILLE, Fla. The percentage of electronic waste occupying our landfills has grown at an alarming rate over the last decade, giving rise to concerns about the toxicity of components used in consumer electronics.

Researchers at the University of Florida are looking for ways to minimize environmental hazards associated with a material likely to play an increasingly important role in the manufacture of these goods in the future. The results of their most recent studies are published in the March 2012 issue of Nanotoxicology.

Carbon nanotubes are already being used in touch screens and to make smaller, more efficient transistors. And if current research to develop them for use in lithium ion batteries is successful, carbon nanotubes could become important technology for powering everything from smartphones to hybrid vehicles. But for all of the promise developers see in this emerging technology, there is also some concern.

"Depending on how the nanotubes are used, they can be toxic exhibiting properties similar to asbestos in laboratory mice," said Jean-Claude Bonzongo, associate professor of environmental engineering at UF's College of Engineering. He is involved in a research collaboration with Kirk Ziegler, a UF associate professor of chemical engineering, to minimize this important material's potential for harm.

In particular, the UF team is investigating toxicity associated with aqueous solutions of carbon nanotubes that would be used in certain manufacturing processes.

"At the nano-scale, electron interactions between atoms are restricted, and that creates some of the desirable traits like the high conductivity that manufacturers want to take advantage of with carbon nanotubes," Ziegler said. "But exploiting those properties is difficult because the nanotubes tend to clump together."

For that reason, carbon nanotubes have to be treated in some way to keep them dispersed and available for e
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Contact: Jean-Claude Bonzongo
bonzongo@ufl.edu
352-392-7604
University of Florida
Source:Eurekalert

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