Abstract
The present work explores an efficient depositive removal process of La(III) by 5-azo-phenolate-8-hydroxyquinoline (5AP-8HQ) using surface metal sequestration methodology (SMSM). Structural characterization of La(III)-complex was confirmed by different techniques. The highest surface coverage value 1597.4μg/cm2 was recognized using pH 6.0, 0.01molL−1 La(III) and 76cm2 surface area. The depositive removal of La(III) followed the Freundlich isotherm model (R2=0.9972) and the values of thermodynamic parameters assured spontaneous and endothermic processes. Furthermore, among the four investigated kinetics models, pseudo-second-order model (K2=1.15g/mgmin) yielded the best fit to describe the removal experimental data of La(III).
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