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Toxic effect of single walled carbon nanotubes combined with cadmium to the crustacean Daphnia magna

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Revel M., Fournier M., Robidoux P. Y.

International Letters of Natural Sciences

2015

tom 42

The aim of this study was to assess the impact of single-walled carbon nanotubes (SWCNT) on the toxicity of cadmium (Cd) using the crustacean Daphnia magna. LC50 of Cd and SWCNT alone and combined were calculated and compared. Sorption of Cd on SWCNT was also quantified in separate batch experiments. Results showed that the maximum adsorption of Cd onto SWCNT calculated by the Langmuir equation was 24.4 mg kg-1. LC50s for Cd and SWCNT alone were 252.3 μg L-1 and 1400 μg L-1, respectively. In the presence of 500 and 1000 μg L-1 of SWCNT, Cd LC50s were 127.2 and 120.1 μg L-1 respectively. Therefore, Cd toxicity increased when organisms were exposed to both contaminants which indicated that SWCNT induces a synergistic toxic effect on the survival of D. magna. It appears that even if SWCNT had a low adsorption capacity for Cd, toxicity of the metal can be increased. Our study shows the complexity of SWCNT toxicity and how the understanding of their interactions with other contaminants is crucial to determine the consequences of their release into the environment.

Ograniczanie wyników

1 International Letters of Natural Sciences

1 Fournier M.

1 Revel M.

1 Robidoux P. Y.

1 2015

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Toxic effect of single walled carbon nanotubes combined with cadmium to the crustacean Daphnia magna