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Oil Components Distribution in Soil - Micromorphological Approach

Răducu DanielaConstantin CarolinaEftene MariusEftene Alina

出版	SSRN, 2015
URL	http://books.google.com.hk/books?id=H8TizwEACAAJ&hl=&source=gbs_api

註釋The paper pointed out, by the aim of chemical and micromorphological analysis, the manner of leaching and deposition of different components of oil (asphaltenes, aliphatic and aromatic hydrocarbons) in a polluted soil, which induce major modifications to soil properties. Soil material polluted with oil from the two types of experiences (a long term experience settled down in the green house of ICPA Bucharest, as well as a laboratory experience) was analysed. The soil material used in the experiences were originated in a Luvisol (Preluvosol Roșcat - SRTS-2012; Chromic Luvisol - WRB-SR-1998). Analytical data as well as micromorphological observations emphasise preferential distribution of oil fractions down the soil. The experimental results suggest that different components of oil had distinct behaviour in soil. The heavy fraction of oil (asphaltenes), which appear black isotropic, impregnated and coated soil aggregates, due to their strongly adsorption by the soil groundmass components. Thus, hinder their translocation down the soil and render impermeability to the soil. The lighter fraction (the aliphatic and aromatic hydrocarbons) remained captive into the pore space, and appeared as drops into the simple packing voids. This pointed out weakly or no connections between the groundmass components (clay, organic matter, sesquioxides, etc.) which permit to these hydrocarbons their translocation. The pores which entrapped the hydrocarbon drops could be inaccessible to plant roots.