Author(s): LIU Feng-ping, ZHANG Xu, PAN Li-jun, National Institute of Environmental Health and Related Products Safety, Chinese Center for Disease Control and Prevention
Pages: 650-652
Year: 2016 Issue:  5
Journal: Chinese Journal of Health Laboratory Technology
Keyword:  Daphnia Magna; Coppery tank; Drinking water; Acute toxic effect;
Abstract: Objective To evaluate the acute toxicity of the drinking water reserved in a commercially available coppery tank with Daphnia Magna,and to calculate its half effective concentration( EC50) and half lethal concentration( LC50). Methods Taking Daphnia Magna as model organism,the inhibition and deaths effect of Daphnia Magna were investigated by reference to Method for Acute Toxicity Test of Daphnia Magna Straus( GB / T 16125—2012). The coppery tank elementary analysis and metal ions concentration measurement were conducted simultaneously during the experimentation to explore the interaction between metal ions concentration and acute toxicity effect. Results It was revealed that the 24 h and 48 h EC50 for Daphnia Magna were5. 55% and 3. 58%,while the LC50 for Daphnia Magna were 8. 32% and 5. 61%,respectively. The concentrations of Cu and Pb in the drinking water were 10. 51 and 1. 17 times over the national standard separately,and the acute toxicity effect was gradually rising up with the increasing exposure concentration of the Daphnia Magna. Conclusion In some way,the drinking water reserved in coppery tank has a certain toxicity for Daphnia Magna,and more attentions must be focused on when using it.