title: Partitioning of Aromatic Constituents into Water from Jet Fuels.
abstract: A comprehensive study of the most commonly used jet fuels (i.e., Jet A-1 and JP-8) was performed to properly assess potential contamination of the subsurface environment from a leaking underground storage tank occurred in an airport. The objectives of this study were to evaluate the concentration ranges of the major components in the water-soluble fraction of jet fuels and to estimate the jet fuel-water partition coefficients (K fw) for target compounds using partitioning experiments and a polyparameter linear free-energy relationship (PP-LFER) approach. The average molecular weight of Jet A-1 and JP-8 was estimated to be 161 and 147 g/mole, respectively. The density of Jet A-1 and JP-8 was measured to be 786 and 780 g/L, respectively. The distribution of nonpolar target compounds between the fuel and water phases was described using a two-phase liquid-liquid equilibrium model. Models were derived using Raoult's law convention for the activity coefficients and the liquid solubility. The observed inverse, log-log linear dependence of the K fw values on the aqueous solubility were well predicted by assuming jet fuel to be an ideal solvent mixture. The experimental partition coefficients were generally well reproduced by PP-LFER.
authors.affiliation: Department of Biotechnology, National Kaohsiung Normal University, 62 Shen-Chung Road, Yanchao, Kaohsiung, 824, Taiwan.
authors.forename: Chien-Jung
authors.initials: CJ
authors.lastname: Tien
authors.forename: Youn-Yuen
authors.initials: YY
authors.lastname: Shu
authors.forename: Shih-Rong
authors.initials: SR
authors.lastname: Ciou
authors.forename: Colin S
authors.initials: CS
authors.lastname: Chen
mesh_terms: D006838:Hydrocarbons / Q000737:chemistry*; D006841:Hydrocarbons, Aromatic / Q000032:analysis*; D008956:Models, Chemical; D014867:Water / Q000737:chemistry; D014874:Water Pollutants, Chemical / Q000032:analysis*
chemical_list: D006838:Hydrocarbons; D006841:Hydrocarbons, Aromatic; D014874:Water Pollutants, Chemical; D014867:Water; C029662:JP5 jet fuel