Abstract
Genotoxic and ecotoxic assessments of widely used nanoparticles, cerium dioxide (CeO 2), silicon dioxide (SiO 2) and titanium dioxide (TiO 2), were conducted on two aquatic sentinel species, the freshwater crustacean Daphnia magna and the larva of the aquatic midge Chironomus riparius. CeO 2 may have genotoxic effects on D. magna and C. riparius, given that the DNA strand breaks increased in both species when exposed to this nanoparticle; whereas, neither exposure to SiO 2 nor TiO 2 had a genotoxic effect on either species. A statistically significant correlation was observed between DNA damage and mortality in the CeO 2-exposed C. riparius, which suggests that CeO 2-induced DNA damage might provoke higher-level consequences. SiO 2 did not seem to affect the DNA integrity; whereas, the mortality of both the SiO 2-exposed D. magna and C. riparius increased . The TiO 2 nanoparticle did not lead to significant alterations in geno- or ecotoxic parameters of both species. Overall, these results suggest that CeO 2 nanoparticles may be genotoxic toward aquatic organisms, which may contribute to the knowledge relating to the aquatic toxicity of the most widely used nanomaterials on aquatic ecosystems, for which little data are available.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
