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Determination of the joint effect of heavy metals and petroleum products on soil phytotoxicity

Urbanized territories are subject to high anthropogenic pressure. The most dangerous pollutants are oil products and heavy metals. However, the study of their joint influence on soil properties has not been carried out in detail. In this work, the combined effect of oil products and heavy metals on soil phytotoxicity was determined. The experiment was carried out on model systems. It was found that with a small amount of heavy metal pollution, the leading factor in the phytotoxic effect is oil pollution. With significant pollution by heavy metals and oil products, the phytotoxic effect is additive in nature from the content of these pollutants. Using the software package STATISTICA 8.0, the mathematical dependence of phytotoxicity on the content of oil products and heavy metals was determined.