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• W2044861346 startingPage "1245" @default.
• W2044861346 abstract "Our focus herein is to evaluate the potential interaction between nC60 and copper, a trace necessary metal, in light of the impact on toxicity. The non-observable effects concentration (NOEC) of nC60 was confirmed as 100 μg L−1 before. When Daphnia magna was exposed to the mixture of copper solution and nC60 suspension (100 μg L−1), LC50 of 48 h was lower than that when they were exposed to copper solution alone. This result clearly showed the decrease in NOEC of copper at the presence of nC60. Cu2+-ATPase activity was enhanced at the presence of nC60, indicating that copper transport involved with the uptake, distribution and depuration in body was increased. We further conducted experiments on accumulation of copper in D. magna. The observed equilibrium copper concentration in D. magna in the mixture of 100 μg L−1 nC60 and 1 μg L−1 copper solution reached 131 μg (kg wet weight)−1, which was more than twice that in copper solution only: 60 μg (kg wet weight)−1. This result demonstrated that the accumulation of copper in D. magna was significantly enhanced at the presence of even low nC60 concentration. Experiments also showed that copper was quickly adsorbed onto nC60. The absorption of copper onto D. magna was statistically correlated to the absorption of nC60 onto D. magna; this might be caused by nC60 facilitating the transfer of copper into D. magna. The absorption and desorption of copper to nC60 (pH = 5.0) reached equilibrium quickly, which may be involved with the co-bioaccumulation and decrease in NOEC of Cu2+ and nC60." @default.
• W2044861346 created "2016-06-24" @default.
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• W2044861346 date "2013-08-01" @default.
• W2044861346 modified "2023-09-27" @default.
• W2044861346 title "Effects of aqueous stable fullerene nanocrystal (nC60) on copper (trace necessary nutrient metal): Enhanced toxicity and accumulation of copper in Daphnia magna" @default.
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• W2044861346 doi "https://doi.org/10.1016/j.chemosphere.2013.04.056" @default.
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