Abstract
In this study, aquatic toxic effect of atrazine, and nano-CeO2, the accumulation, reproduction and adsorption of atrazine onto nano-CeO2 and the facilitated transport of atrazine into D. magna by nano-CeO2 were examined. The results showed that atrazine concentrations of 3.0, 4.0, and 10.0 mg/L exhibited 43%, 56%, 68% mortalities, respectively, which indicated the mortality was 56% while the concentration of nano-CeO2 was 4.0 mg/L. D. magna accumulated considerably more atrazine when exposed to atrazine-contaminated water in the presence of nano-CeO2. At the same time, atrazine and nano-CeO2 yielded a significant reduction of the reproduction rate at all concentrations tested. What is more, the co-exposure of nano-CeO2 and atrazine was observed to significantly decrease the reproduction rate of D. magna, and atrazine adsorbed on nano-CeO2 quickly. Therefore, attention should be paid to their associations with other contaminants for the risk assessment of nano-CeO2 and it is worthy of notice that the sorption of atrazine on nano-CeO2 would enhance the toxicity of atrazine to D. magna.
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Han, Z., Li, J., Bao, W. et al. Enhanced toxicity of atrazine to Daphnia magna in the presence of nano-CeO2 . Chin. J. Geochem. 31, 297–302 (2012). https://doi.org/10.1007/s11631-012-0578-y
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DOI: https://doi.org/10.1007/s11631-012-0578-y