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Enhanced toxicity of atrazine to Daphnia magna in the presence of nano-CeO2

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doi: 10.1007/s11631-012-0578-y
Authors:Han Zhaoxiang; Li Jiaying; Bao Wei; Wang Jiahong
Author Affiliations:Primary:
Huaihai Institute of Technology, School of Chemical Engineering, Lianyungang, China
Other:
Changji University, China
Nanjiing University, China
Volume Title:Chinese Journal of Geochemistry Diqiu Huaxue
Source:Chinese Journal of Geochemistry = Diqiu Huaxue, 31(3), p.297-302. Publisher: Springer, Beijing, China. ISSN: 1000-9426
Publication Date:2012
Note:In English. 20 refs.; illus.
Summary: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. Copyright 2012 Science Press, Institute of Geochemistry, CAS and Springer-Verlag Berlin Heidelberg
Subjects:Atrazine; Cerium; Environmental geology; Herbicides; Metals; Nanoparticles; Organic compounds; Pesticides; Pollution; Rare earths; Toxicity; Triazines; Water pollution
Record ID:695309-9
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