MIGRATION OF WATER-SOLUBLE OIL COMPONENTS IN SOME SOILS OF BASHKORTOSTAN
The migration of the water-soluble fraction of petroleum hydrocarbons in typical soils of Bashkortostan is studied. In a lysimetric model experiment, the possibility of water migration of petroleum hydrocarbons in Fluvic Phaeozems, Haplic Phaeozems and Amphiskeletic Pantocalcic Chernozems was revealed. Among the dissolved organic substances that pass into lysimetric waters from oil-contaminated soils, the components that are not extracted by hexane, but have fuorescence in water at the wavelengths typical for petroleum products are revealed. Tese substances difer from soluble organic matter of background soils by higher HIX humifcation indices and presumably represent oxidized products of transformation of petroleum hydrocarbons. Lysimetric waters from all oil-contaminated soils are characterized by biotoxicity, regardless of the presence of non-polar petroleum hydrocarbons. Te toxicity T-index positively correlates with the content of dissolved organic carbon and chloride ions that accompany soils oil pollution.