Journal
SCIENCE OF THE TOTAL ENVIRONMENT
Volume 784, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.scitotenv.2021.146914
Keywords
Bioaccumulation; Metabolism; Oxidative stress; Neurotoxicity
Categories
Funding
- Asociacion Universitaria Iberoamericana de Postgrado (AIUP)
- project BISPECIAl: BIvalveS under Polluted Environment and ClImate chAnge - FEDER, through COMPETE2020 -Programa Operacional Competitividade e Internacionalizacao (POCI) [POCI-01-0145-FEDER-028425]
- FCT/MCTES
- REQUIMTE [UIDB/50006/2020, UIDB/50017/2020+UIDP/50017/2020]
- CESAM [UIDB/50006/2020, UIDB/50017/2020+UIDP/50017/2020]
- FEDER, within the PT2020 Partnership Agreement
- FCT/MEC
- FEDER, within the Compete 2020
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The study evaluated the effects of rare earth elements and nanoparticles on clam species, showing no cellular damages but greater impact on antioxidant capacity in invasive clams, indicating potential risks to aquatic environments.
In the last decades the use of rare earth elements (REEs) increased exponentially, including Terbium (Tb) which has been widely used in newly developed electronic devices. Also, the production and application of nanoparticles has been growing, being Carbon Nanotubes (CNTs) among the most commonly used. Accompanying such development patterns, emissions towards the aquatic environments are highly probable, with scarce information regarding the potential toxicity of these pollutants to inhabiting species, especially considering their mixture. In the present study the effects of Tb and CNTs exposure (acting alone or as a mixture) on native and invasive clams' species (Ruditapes decussatus and Ruditapes philippinarum, respectively) were evaluated, assessing clams' accumulation and metabolic capacities, oxidative status as well neurotoxic impacts. Results obtained after a 28days exposure period showed that the accumulation of Tb in both species was not affected by the presence of the CNTs and similar Tb concentrations were found in both species. The effects caused by Tb and CNTs, acting alone or as a mixture induced greater alterations in R. philippinarum antioxidant capacity in comparison to native R. decussatus, but no cellular damages were observed in both species. Nevertheless, although metabolic impairment was only observed in clams exposed to Tb, loss of redox balance and neurotoxicity were evidenced by
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