The effect of petroleum products pollution on environmental soil condition at airport adjacent territory

Purpose. Determination of the impact of oil pollution at the territory adjacent to the airport on the ecological state of the soil. Methodology. The authors evaluate the impact of petroleum products on the ecological conditions of the soil at the territory adjacent to the airport. In particular, it was done experimentally, using the method of biotesting of soil sample data. Also, the component composition of chemical soil pollution was analyzed applying chromatographic analysis. Using the method of mathematical modeling, a two-factor model was built taking into account the factor of “content of oil products (X1)” in the soil and “distance from the runway (X2)” to describe the impact of air transport processes on the condition of the soil at the territory adjacent to airports. Findings. Based on the obtained experimental data, the level of soil pollution at the territory adjacent to the airport was determined. It was established that for two soil samples, taken at a distance of 50 and 500 m from the runway of the airport, the content of oil products is below the established approximately permissible concentration. For samples taken at distances of 1,000, 1,500 and 2,000 m, an excess was established. The results of the chromatographic analysis of the composition of chemical contamination of the soil indicated a significant amount of hydrocarbons characteristic of the fuel fractions of oil. The obtained results demonstrate the dependence of the level of soil contamination with petroleum products on the distance to the runway and the presence of technogenic influence of this enterprise on the ecological state of the soil, which was confirmed with the results of biotesting of these soil samples. A two-factor model was built taking into account the factors of “content of petroleum products (X1)” in the soil and “distance from the runway (X2)” and their influence on soil phytotoxicity. The adequacy of the proposed model is evidenced by the coefficient of determination R2 = 0.9153 for the tested soil samples. Originality. The results of the experimental studies show that chemical pollution negatively affects the ecological condition of the soil at the territory adjacent to the airport; has a multi-component composition, and, in addition to hydrocarbons, which are characterize petroleum products used for refueling and operating vehicles, there are products of decomposition and aging of polymers, components of additives. The dependence of the ecological state of the soil on the technologically loaded territory adjacent to the airport on the level of petroleum products pollution and on the distance to the airport runway was determined. To find out the significance of the impact on the level of phytotoxicity of the soil of each of the two factors (the content of petroleum products and the distance from the runway), a multifactor statistical analysis of the obtained data was carried out and a two-factor model was built. This made it possible to establish that the contribution of the factor X1 (content of oil products) to the change in the soil phytotoxicity indicator is significantly greater than the contribution of the factor X2 (distance from the airport). Practical value. Based on the results of the analysis of the obtained experimental data, a two-factor model is proposed, which takes into account the factors X1 and X2 and can be used for further studies of the impact of air transport processes on the state of the soil at the areas near airports.