אסיף מאגר המחקר החקלאי

Behaviour of neat and enriched volatile petroleum hydrocarbon mixtures in the subsurface during leaching

Year:

2000

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Volume :

8

Co-Authors:

Dror, I., Clemson Inst. of Envtl. Toxicology, 509 Westinghouse Drive, Pendelton, SC 29670, United States
Gerstl, Z., Clemson Inst. of Envtl. Toxicology, 509 Westinghouse Drive, Pendelton, SC 29670, United States
Prost, R., Clemson Inst. of Envtl. Toxicology, 509 Westinghouse Drive, Pendelton, SC 29670, United States
Yaron, B., Clemson Inst. of Envtl. Toxicology, 509 Westinghouse Drive, Pendelton, SC 29670, United States

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Abstract:

Petroleum products are a mixture of volatile hydrocarbons, and together with other industrial waste, are subject to leaching by water. During leaching the fate of petroleum contaminants in the unsaturated zone is affected by the properties of the surrounding porous material, various processes (e.g. retention, volatilization, dissolution, biodegradation), and by the composition of the hydrocarbon mixture itself. The effect of the enrichment of leaching water with salts and humic substances on volatile petroleum hydrocarbon mixture (VPHM) dissolution is examined in this work. Data showed a 'salting out effect', and an increase in the concentration of humic substances caused an increase in VPHM dissolution. The properties of each component in the hydrocarbon mixture was found to affect the component fate in the subsurface; for example, differential redistribution was found for each compound. The addition of organic solvents did not affect the redistribution of the total mixture. The weathering phenomenon characterized by physical and chemical changes in the composition of the hydrocarbon mixture is caused by a natural attenuation. The composition of the VPHM had a profound influence on the weathering pattern of the mixture.

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