Ecological State of Technogeneous Saline Soil of Oil-Contaminated Alluvial Ecosystems and Their Remediation Techniques

Abstract

The article discloses the trends of technogenic salts distribution in alluvial soils contaminated with oil and petroleum products. The salt distribution was examined in the lateral direction-impact zone, oil contamination boundary, as well as radial salts distribution within the soil profile (to 100 cm depth). Specifics and chemistry of technogenic halogenesis process (freely soluble including phytotoxic salts content, qualitative composition, migration and distribution trends) has been identified for soils of different contaminated zones. It was revealed that technogenic salinization of alluvial soils (that is the end body of the cascaded geochemical systems) is an essential geoecological factor contributing to formation within oil-contaminated areas of new technogenic soil-geochemical successions-chemical-contaminated soils, showing the features of salinity not typical for humid climate. The technique of technogeneous saline soil remediation was suggested based on indigenous halophyte plants phytomelioration sowing.