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Abstract
The aim of this work is to describe the solubility of polycyclic aromatic hydrocarbons (PAHs) in subcritical water. To achieve this goal, first, a literature survey of the solubilities of PAHs in water and of naphthalene in mixtures of water and ethanol was made. Subsequently, the cubic plus association equation of state was used to describe the solubility of PAHs in the liquid phase. For accurate descriptions of the aqueous solubility of PAHs, the binary interaction parameters and cross-association volumes were regressed based on the experimental solubilities at atmospheric pressure. These regressed parameters are then used for subcritical water. Additionally, these parameters have been determined for the (naphthalene + ethanol) binary system. These regressed parameters have then been applied to predict the solubility of naphthalene in (ethanol + water) solutions. The results of the present model prove that it can be successfully applied for reproducing the solubilities of PAHs in the aqueous phase.
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