期刊
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
卷 94, 期 -, 页码 73-79出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.ecoenv.2013.04.026
关键词
Mixture toxicity; Heavy metals; Feeding assay; Concentration addition; Independent action
资金
- Natural Science Foundation of Jiangsu province [BK2011655]
- National Natural Science Foundation of Youth Fund [41101292]
- Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)
The combined toxicity of four heavy metals (copper, zinc, cadmium and chromium) to the nematode Caenorhabditis elegans was determined by using feeding as an endpoint. Six equivalent-effect concentration ratio (EECR) mixtures and six uniform design concentration ratio (UDCR) mixtures were designed to fully explore the combined toxicities of these heavy metals. Observed toxicities were compared with predictions calculated by two basic models, concentration addition (CA) and independent action (IA). All the concentration-response relationships of the mixtures can be well characterized and described by the Weibull function. CA provided a relatively better prediction for the mix-toxicity of the four heavy metals, which share a similar mode of action on the feeding of C. elegans, although the prediction calculated by IA was also reliable, from the viewpoint of model prediction. (C) 2013 Elsevier Inc. All rights reserved.
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