Physics
Scientific paper
May 1976
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976gecoa..40..555e&link_type=abstract
Geochimica et Cosmochimica Acta, vol. 40, Issue 5, pp.555-561
Physics
2
Scientific paper
The solubilities of several medium molecular weight aromatic hydrocarbons were determined at 25°C in aqueous binary, ternary, and quaternary systems. The binary systems consisted of distilled water plus one each of the following: naphthalene, 1-methylnaphthalene, 2-methylnaphthalene, biphenyl, 2-ethylnaphthalene, 1,5-dimethylnaphthalene, 2,3-dimethylnaphthalene, 2,6-dimethylnaphthalene, acenaphthene and phenanthrene. The ternary systems consisted of distilled water plus one of the following hydrocarbon pairs: naphthalene/biphenyl, naphthalene/acenaphthene, naphthalene/phenanthrene, biphenyl/phenanthrene, biphenyl/2-methylnaphthalene, acenaphthene/phenanthrene and 2-methylnaph-thalene/phenanthrene. Quaternary systems consisted of distilled water and one of the following hydrocarbon mixtures: naphthalene/biphenyl/phenanthrene, 2-methylnaphthalene/biphenyl/phenanthrene and naphthalene/acenaphthene/phenanthrene. In binary systems at S %. = 0, solubilities ranged from 31.3 ppm for naphthalene to 1.07 ppm for phenanthrene. The alkyl naphthalenes exhibited solubilities which were a function of molar volume and substituent size and position. In ternary and quaternary systems, solubilities often deviated from values obtained in binary systems presumably due to solute-solute interactions and/or formation of solid solutions. Aromatic hydrocarbons are `salted out' by increasing concentrations of inorganic salts. At S %. = 35, the solubility of naphthalene is 22.0 ppm and of phenanthrene, 0.71 ppm. The empirical salting parameters are identical in both binary and quaternary systems.
Calder John A.
Eganhouse Robert P.
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