Abstract
The presence of pharmaceutical wastes has been detected in various water environments. These pharmaceutical pollutants may lead to serious problems to human and animal health. Various molecular interactions existing in aqueous drug systems may be considered responsible for these health hazards. For the present investigation density and acoustic properties of the solutions with different drug concentrations were measured at 298.15 K. Various mathematical relations were used to derive a number of physico-chemical parameters including isentropic compressibility (KS), apparent molar isentropic compressibility KS,ϕ, isothermal compressibility (KT), intermolecular free length (Lf), molar free volume (Vf), internal pressure (πi), acoustic impedance (Z), relative association (RA) and surface tension (S). In an attempt to understand the interactions between ionic, hydrophilic and hydrophobic parts of drug fragments present in the ternary solutions and the structural effects of the solute on the solvent, a thorough analysis of these parameters were done. A conclusion can be drawn that the structure making properties of the drug molecules play an important role and solute–solvent interactions are prevalent in these systems.
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