Abstract
Polymers can be used to alter the ability of surfactant micelles to solubilize PAHs depending upon polymer–surfactant interactions. The focus of this study is to investigate the solubilization ability of the mixtures of anionic polymer sodium carboxymethyl cellulose (NaCMC) with nonionic polyoxyethylene [10] cetyl ether (Brij 56) and cationic cetyltrimethylammonium bromide (CTAB) surfactant micelles towards pyrene (PAH). Solubilization efficiency of these mixed systems and their comparison with individual systems has been quantified in terms of the molar solubilization ratio, micelle - water partition coefficient and free energy of solubilization. While the addition of anionic polymer NaCMC accelerates the solubilization capacity of cationic CTAB micelles, that of nonionic Brij56 micelles was retarded. Moreover, enhancement in the solubilization capacity of the above said mixed systems is observed as the polymer concentration changes from below overlap (i.e.; 0.5 %) to overlap (i.e.; %).
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