Evaluation of Oil Content in Soil

Author(s):  A.A. Okolelova, Dr., Prof., Volgograd state technical University, Volgograd, Russia, allaokol@mail.ru

V.N. Kaplya, Volgograd State Technical University, Volgograd, Russia, veronikazaikina@mail.ru

A.G. Lapchenkov, Volgograd State Technical University, Volgograd, Russia, allaokol@mail.ru

Issue:  Volume 43, № 1

Rubric:  Earth sciences

Annotation:  Analyzed interpretation of the term «petroleum products» in the technical, analytical values, from the point of view of chemists, ecologists, soil scientists and analysts. The principles that should be taken into account in the development of standards for the regulation of petroleum products are substantiated and proposed: accounting for non-specific organic compounds, organic carbon content in the soil, methods of analysis, properties of extractants, changes in the content of organic carbon in the soil contaminated with petroleum products, units of measurement of humus and petroleum products, the horizon in which samples are taken. It is proposed to determine the content of petroleum products and organic carbon in conditionally uncontaminated soil and the studied soil. In conditionally uncontaminated soil, non-specific organic compounds of the soil itself are defined as «petroleum products». In conditionally uncontaminated virgin soil as «petroleum products» revealed the presence of organic compounds of the soil. When recalculating the organic carbon content in mg / kg, it is obvious that the concentration of petroleum products in comparison with sorghum is insignificant. In determining the organic carbon of anthropogenic origin to recalculate the results on the content of petroleum products taking into account the proposed coefficient of 1.2. The choice of the method of determination of petroleum products and chemical properties of the extractant affect the results of the analysis. To obtain comparable results, it is optimal to use one method of analysis. Due to the inaccessibility of this, we propose to introduce a conversion factor from one analysis to another. This is possible with a statistically significant number of experiments. When carrying out engineering and environmental surveys, monitoring is required to take into account the fact of removal of the fertile soil layer. Therefore, before its removal, it is necessary to determine the content of sorghum and NP in the fertile and illuvial horizon, which after removal of the upper layer will become surface.

Keywords:  petrochemical products, organic carbon, soil, nonspecific organic compounds, methods of analysis, properties of the extractant, the horizon, n-hexane, chloroform, carbon tetrachloride.

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