Effect of polyaniline maize tree-trunk composite on adsorption of lead (II) and cadmium (II) ions from solution

Abstract

a b s t r a c tHybrid nanostructured composite by polyaniline (PANi) and maize tree-trunk (MTT) was prepared by chemical polymerization method. Its structural morphology was nano range through SEM and TEM images. The decomposition temperature of PANi-MTT composite for 61.9% was about 341°C, less than that of PANi (about 507°C) for 46.6% through thermal analysis. It means this composite is less thermal stable than pure PANi because of MTT presence in composite matrix. The conductivity of PANi-MTT in salt form was 0.597 mS cm -1 , much smaller than that of pure PANi (35 mS cm -1 ) in the same state. The adsorption isotherm process of lead (II) and Cd (II) on PANi-MTT followed by Freundlich model better than by Langmuir one thanks to higher correlation coefficients (~1). It occurred spontaneously and fitted into the second order reaction. The maximum capacities were 121.951 mg g -1 and 54.645 mg g -1 for Pb 2+ and Cd 2+ ions, respectively.

La eliminación de metales tóxicos presentes en efluentes líquidos mediante resinas de cambio iónico. Parte IX: Plomo(II))/H+/Amberlite IR-120

“…for a 0.5 g•L -1 resin dose the time was 2 h against the more than the 5 h needed for the 0.065 g•L -1 resin dose. Experimental data were fit to the Freundlich and Langmuir models, the results from these fits indicated that the system responded better to the Freundlich mode (r 2 : 0.9074) (Babaei et al, 2017;Mai et al, 2017;Wang et al, 2017 (3)…”