Assessment of hydrocarbon contamination in the industrial area of Khabarovsk (water, soils, sediments)

Complex chemical-analytical and microbiological studies of hydrocarbon pollution of water, soil and bottom sediments in the industrial zone of Khabarovsk have been carried out. The content of hydrocarbons (hydrocarbons) in soils ranged from 400 to 4560 mg/kg which corresponds to the degree of pollution from "increased -background" to "strong". The maximum (up to 17640 mg/kg) level of hydrocarbons accumulation was identified in bottom sediments of a small river Kurcha-Murcha. The industrial zone runoff to the Amur results in increase of the hydrocarbon content and the number of oil-oxidizing bacteria in the impact zone of the Kurcha-Murcha River. The content of hydrocarbon in the Amur River before the mouth of the Kurcha-Murcha River is defined as “dangerous”, and in the Kurcha-Murcha River as “strong”. At the level of molecular markers (n-alkanes), it was established the predominance of microbiologically and pyrogenically transformed hydrocarbons in soils.