Solubility of polychlorinated biphenyls in water/alcohol mixtures. 1. Experimental data

The solubilities of 4-monochlorobiphenyl, 2,4,6-trichlorobiphenyl, and 2,2',4,4',6,6'-hexachlorobiphenyl in mixtures of water and n-alcohols were measured using batch equilibrium techniques. The n-alcohols have carbon numbers ranging from one to eight. Measurements were made over a wide range of alcohol concentrations. The presence of methanol, ethanol, and 1-propanol enhances the aqueous solubility of the solutes, and the degree of enhancement increases with increasing hydrophobicity of both solute and alcohol. Deviations from a log-linear relationship were observed. Partially water-miscible alcohols (1-butanol, 1-pentanol, 1-heranol, 1-heptanol, and 1-octanol), when saturated in water, tend to exert smaller effects on the solubility of solutes as the alkyl chain of the alcohols becomes longer