PHYTOREMEDIATION OF OIL CONTAMINATED SOIL USING SEA BUCKTHORN

Abstract

Here we presented the potential phytoremediation of oil contaminated soil using Sea Buckthorn. Sea Buckthorn successfully adapts to adverse conditions of the oil-contaminated soils and provides the high level of cleaning oil-contaminated soils from oil up to 92.7%, on the fourth year of growth. Sea Buckthorn improves microbiological properties of soil: increases the heterotroph microorganisms by 10 4 times, oil destructive microorganisms – by 6×10 2 , nitrogen-fixing microorganisms by 10 times; moreover, it eliminates soil toxicity, increases content of total nitrogen and ammonia. The surface root system of Sea Buckthorn forms well developed root sprouts, that successfully extends to neighboring areas, improves water-air properties, contributes to the rapid formation of dense soil cover, biomass accumulation, formation of humus and provides prolongation of phytoremediation action. Sterility of pollen and content of carotenoid in Sea Buckthorn leaves in the conditions of oil-contamination were within normal range and testifies to the plant tolerance towards oil contamination. Sea Buckthorn improves the physical, chemical and biological properties of soils, reduces oil contamination, protects the oil contaminated soils from erosion. We could recommend this species for the phytoremediation of oil contaminated soil.