John Wiley & Sons, Ltd.

Ecotoxicity of multiwalled carbon nanotubes: Standardization of the dispersion methods and concentration measurements

0
There is currently a variety of applications for multiwalled carbon nanotubes (MWCNTs), but considerable concerns exist regarding their release into the environment. Their potential accumulation by aquatic organisms could lead to a transfer throughout food chains. Considering the divergences in experimental data published on ecotoxicity of carbon nanotubes, further research is required. The dispersion of MWCNTs in aqueous culturing media of organisms as well as the determination of concentrations are relevant aspects to obtain accurate ecotoxicity results. UV/vis spectroscopy is one of the most reported techniques to analyze concentration quickly and economically, but the methodologies to prepare dispersions and selecting the wavelengths for UV/vis measurements have not yet been clearly defined. The work herein presented demonstrates that dispersion procedures influence absorbance, and an approach to determine the most appropriate measurement wavelength is proposed. Ecotoxicity tests with MWCNTs were performed on Vibrio fischeri bacteria and divergences in the results were observed with respect to those previously reported. The present study contributes to overcome the lack of standardization in the environmental assessment of MWCNTs. This article is protected by copyright. All rights reserved

Customer comments

No comments were found for Ecotoxicity of multiwalled carbon nanotubes: Standardization of the dispersion methods and concentration measurements. Be the first to comment!