Chemical Research in Chinese Universities ›› 2012, Vol. 28 ›› Issue (2): 209-213 .

• Articles • Previous Articles     Next Articles

Toxicity of Nanoscale CuO and ZnO to Daphnia magna

ZHAO Hai-zhou, LU Guang-hua, XIA Jun, JIN Shao-ge   

  1. Key Laboratory of Integrated Regulation and Resources Development of Shallow Lakes, Ministry of Education, College of Environment, Hohai University, Nanjing 210098, P. R. China
  • Received:2011-06-02 Revised:2011-08-15 Online:2012-03-25 Published:2012-03-08
  • Supported by:

    Supported by the National Basic Research Program of China(No.2010CB429006) and the Fundamental Research Funds for the Central Universities of China(No.2010B05714).

Abstract: The potential effects of nanoscale CuO(nCuO), nanoscale ZnO(nZnO) and their mixtures on Daphnia magna were investigated, including 48-h acute toxicity and 21-d chronic toxicity tests as well as a feeding experiment. The results of acute toxicity show that nCuO/nZnO mixture was the most toxic followed by nCuO and nZnO. The nanoparticles(NPs) inhibited both the growth and reproduction of Daphnia magna during the testing period. Concentration dependence was apparent in all the cases and the intrinsic rate of natural increase was confirmed to be a very sensitive parameter to NPs exposure. Binary mixture appeared to be more toxic than the corresponding individual exposures at most cases except for the feeding behavior.

Key words: Daphnia magna, Nanoparticle, Binary mixture, Toxicity