| Based on the study of the biotoxicity of soil environmental pollutants to Photobacterium Phosphoreum, this subject attempted to find the composite toxicity regularity of heavy metal and the response relationships between polycyclic aromatic hydrocarbons (PAHs) toxicity and quantum chemistry parameters in order to predict and control.First of all, a rapid determination method of petroleum-contaminated soil biotoxicity with Photobacterium Phosphoreum was established. Moreover, the biotoxicity influences of five kinds of main heavy metal ions at varying proportions concentration in soil background solution were simulated. Last but not lest, the quantitative structure-activity relationships(QSAR) models between 16 kinds of PAHs toxicity and quantum chemistry parameters were constructed. Meanwhile, the paper revealed the relationships between gas chromatographic retention indices of PAHs and quantum chemistry parameters preliminarily.The results suggested that the biotoxicity order of five kinds of single heavy metal ions in using pure water as the background solution was as followed: Pb2+>Zn2+- Cd2+>Cu2+>Cr3+. The toxic-concentration doses model of five kinds of heavy metal ions with soil water extract as the background showed the interaction of Cu2+ and Zn2+ embodied in the antagonism role, while Cd2+ and Cr3+ in synergy. The contribution of Zn2+ on reducing the biotoxicity in heavy metal composite pollution control field should be researched ulteriorly. There were good response relationships between the biotoxicity(-1gEC50) of 16 kinds of PAHs and total energy(TE), so the models can be used on biotoxicity forecasts with the similar chemical. The good quantitative structure-chromatographic retain related model was also obtainedThe models in this paper has certain prediction ability, and the research provides certain reference for the biotoxicity characterization limits of formulation in the soil environment quality standard.
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