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Ecotoxicological effects of carbon nanotubes and cellulose nanofibers in Chlorella vulgaris
Link to Journal Abstract
MWCNT and CNF are interesting NPs that possess great potential for applications in various fields such as water treatment, reinforcement materials and medical devices. However, the rapid dissemination of NPs can impact the environment and in the human health. Thus, the aim of this study was to evaluate the MWCNT and cotton CNF toxicological effects on freshwater green microalgae Chlorella vulgaris. Results Exposure to MWCNT and cotton CNF led to reductions on algal growth and cell viability. NP exposure induced reactive oxygen species (ROS) production and a decreased of intracellular ATP levels. Addition of NPs further induced ultrastructural cell damage. MWCNTs penetrate the cell membrane and individual MWCNTs are seen in the cytoplasm while no evidence of cotton CNFs was found inside the cells. Cellular uptake of MWCNT was observed in algae cells cultured in BB medium, but cells cultured in Seine river water did not internalize MWCNTs. Conclusions Under the conditions tested, such results confirmed that exposure to MWCNTs and to cotton CNFs affects cell viability and algal growth.
The aim of this study was to evaluate the multi wall carbon nanotube (MWCNT) and cotton cellulose nanofiber (CNF) toxicological effects on freshwater green microalgae Chlorella vulgaris. This work provides a direct comparison of the impact of MWCNTs and cotton CNFs to C. vulgaris, either in BB culture medium or in Seine river water.
Peer Reviewed Journal Article
Exposure Or Hazard Target
Method Of Study
Environmental Fate and Transport
Risk Exposure Group
Journal of Nanobiotechnology, 2014, 12: 15 (13 pp)
Journal of Nanobiotechnology
Pereira MM, Mouton L, Yepremian C, Coute A, Lo J, Marconcini JM, Ladeira LO, Raposo NRB, Brandao HM, Brayner R
Last updated on June 16, 2014
This work is supported in part by the Nanoscale Science and Engineering Initiative of the National Science Foundation
under NSF Award Number EEC-0118007.
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