Tetraethylenepentamine-modified cellulose-graft-poly(methyl acrylate) applicable for Pb(II) adsorption from aqueous solution

Abstract

Tetraethylenepentamine-modified cellulose-graft-poly(methyl acrylate) (Cell-g-PMA-TEPA), a polyamino-functionalized adsorbent for Pb(II), has been prepared via graft polymerization of methyl acrylate (MA) from surface of microcrystalline cellulose and subsequent amidation with tetraethylenepentamine (TEPA). Influence of initial pH and contact time on adsorption has also been investigated. The adsorption kinetic could be best represented by pseudo-second-order model, while equilibrium data fits well with Langmuir isotherm model, from which maximum adsorption capacity could be derived as 444.4 mg g^-1. Further consecutive experiments indicate less than 10% loss in equilibrium adsorption capacity after five adsorption-desorption cycles.