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Evaluation of Combined Toxicity of Phenols and Lead to Photobacterium phosphoreum and Quantitative Structure–Activity Relationships

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The combined toxicity of lead (Pb) and nine phenols were measured. The result indicated that the combined toxicity is not only dependent on the Pb concentrations but also on the positions of substituted groups of phenols. Quantitative structure–activity relationship equations were built from the combined toxicity and physico-chemical descriptors of phenols in the different Pb concentrations. The combined toxicity was related to water solubility and the third order molecular connectivity index (3 X) in low Pb concentration, to solute excess molar refractivity (E) and ionization constant (pKa) in medium Pb concentration and to dipolarity/polarizability (S) in high Pb concentration.

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This research was financed by the National Nature Science Foundation of China (40673059) and Science Foundation for Young Teachers of Northeast Normal University (20080501).

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Correspondence to X. Yuan.

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Su, L.M., Zhao, Y.H., Yuan, X. et al. Evaluation of Combined Toxicity of Phenols and Lead to Photobacterium phosphoreum and Quantitative Structure–Activity Relationships. Bull Environ Contam Toxicol 84, 311–314 (2010).

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  • QSAR
  • Photobacterium phosphoreum
  • Synergism
  • Antagonism