using polyaniline/maghemit magnetic nanocomposite for removal of lead from aqueous solutions

Polyaniline/maghemite magnetic nanocomposite (pani/γ -fe2o3 mnc) was used as active agents for removal of lead ions from aqueous media. chemical co-precipitation method was used to prepare the maghemite nanoparticles. subsequently, the mnc was synthesized through polymerization of aniline. it was characterized by ft-ir.the efficiency of this mnc was estimated for pb (ii) removal by using batch method. the results showed that optimum conditions for lead removal were found to be at ph of 6, adsorbent dosage of 0.04 g and equilibrium contact time of 90 min. the kinetic of adsorption system have been studied based on the assumption of a pseudo-second order rate law. the adsorption isotherms were examined. the freundlich adsorption isotherm model was found to represent the equilibrium adsorption isotherm better than langmuir isotherm. the thermodynamic studies indicated that the adsorption was spontaneous and endothermic process for lead.