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Joint toxicity of six common heavy metals to Chlorella pyrenoidosa

  • Water Environment Protection and Contamination Treatment
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Abstract

Six common heavy metals (Ni, Fe, Zn, Pb, Cd, and Cr) in the water environment were selected to present five groups of binary mixture systems (Ni-Fe, Ni-Zn, Ni-Pb, Ni-Cd, and Ni-Cr) through a direct equipartition ray design. Microplate toxicity analysis based on Chlorella pyrenoidosa measured the 96-h joint toxicities of the binary mixtures. Toxicity interaction of the binary mixture was analyzed by comparing the observed toxicity data with the reference model (concentration addition). The results indicated that Ni-Fe, Ni-Pb, and Ni-Cr mixtures showed additive effects at concentration tested. It was indicated that Ni-Zn and Ni-Cd mixtures presented additive effects at low concentrations whereas synergistic effects were seen at high concentrations.

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Acknowledgments

The authors are especially grateful for the financial support received from the National Natural Science Foundation of China (21667013 and 21407032), Science Research and Technology Development Project of Guangxi (Guikehe1599005-2-2), and Special Funding for Guangxi “BaGui Scholar” Construction Projects.

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Correspondence to Li-Tang Qin or Hong-Hu Zeng.

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The authors declare that they have no conflict of interest.

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Responsible editor: Philippe Garrigues

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Mo, LY., Zhao, DN., Qin, M. et al. Joint toxicity of six common heavy metals to Chlorella pyrenoidosa. Environ Sci Pollut Res 26, 30554–30560 (2019). https://doi.org/10.1007/s11356-017-0837-x

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  • DOI: https://doi.org/10.1007/s11356-017-0837-x

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