Abstract
Abstract The solubilities of metal-surfactant salts in aqueous systems influence foam separation processes. The solubility products of selected salts of metal ions with anionic C 12 surfactants were determined. Lead dodecylsulfate, lead dodecylsulfonate, lead dodecanoate and chromium dodecylsulfate have solubility products of 1.9 × 10 −10 , 5.0 × 10 −12 4.4 × 10 −16 (mol dm −3 ) 3 , and 6.9 × 10 −14 (mol dm −3 ) 4 , respectively, as determined from turbidity measurements. Copper and cadmium dodecylsulfates have significantly higher solubility products of 3.79 × 10 −3 and 3.18 × 10 −2 (mol dm −3 ) 3 respectively, determined by chemical analysis of supernatants produced after precipitation of the salts.
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