Partitioning of aromatic constituents into water from gasoline and other complex solvent mixtures

Journal Article · Wed May 01 00:00:00 EDT 1991 · Environmental Science and Technology; (United States)

DOI:https://doi.org/10.1021/es00017a013· OSTI ID:5156389

Cline, P V; Delfino, J J; Rao, P S.C. ^[1]

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1. Univ. of Florida, Gainesville (United States)

Variations in gasoline composition (source variations) as well as complexity (nonideal behavior, cosolvent effects) contributing to variability in gasoline-water partitioning of aromatic hydrocarbon constituents were examined. Aromatic hydrocarbon concentrations in water extracts of 31 gasoline samples varied over 1 order of magnitude, reflecting the diversity in gasoline composition. However, the gasoline-water partition coefficients (K{sub fw}) varied by less than 30% among these samples. Partitioning between water and known mixtures of aromatic and aliphatic solvents was measured and used to estimate the upper and lower bounds of K{sub fw} values for more complex solvent mixtures such as gasoline and diesel fuel. Oxygenated additives, such as methanol and methyl tert-butyl ether (MTBE), were shown to have minimal cosolvent effects on hydrocarbon partitioning. The observed inverse, log-log linear dependence of K{sub fw} values on aqueous solubility could be well predicted by assuming gasoline to be an ideal solvent mixture (i.e., Raoult's law is valid).

• OSTI ID: 5156389
• Journal Information: Environmental Science and Technology; (United States), Vol. 25:5; ISSN 0013-936X
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
AROMATICS
SOLUBILITY
GASOLINE
CHEMICAL COMPOSITION
SOLVENT PROPERTIES
WATER
CARBON 14
DIESEL FUELS
ETHERS
GAS CHROMATOGRAPHY
HYDROCARBONS
METHANOL
MOLECULAR WEIGHT
PARTITION
QUANTITY RATIO
SOLVENTS
TRACER TECHNIQUES
UNLEADED GASOLINE
ALCOHOLS
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
CARBON ISOTOPES
CHROMATOGRAPHY
ENERGY SOURCES
EVEN-EVEN NUCLEI
FOSSIL FUELS
FUELS
GAS OILS
HYDROGEN COMPOUNDS
HYDROXY COMPOUNDS
ISOTOPE APPLICATIONS
ISOTOPES
LIGHT NUCLEI
LIQUID FUELS
NUCLEI
ORGANIC COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
OXYGEN COMPOUNDS
PETROLEUM
PETROLEUM FRACTIONS
PETROLEUM PRODUCTS
RADIOISOTOPES
SEPARATION PROCESSES
YEARS LIVING RADIOISOTOPES
023000* - Petroleum- Properties & Composition