Abstract
In this undertaking, nanofibrous membrane of cellulose acetate (CA) with varying concentrations of iron-modified nanozeolite (Fe-MNZ) were produced through electrospinning technique for the simultaneous adsorption of Ni2+, Co2+ and Cu2+ heavy metal ions in wastewater. The electrospun nanofibrous membranes (ENMs) produced underwent different characterization techniques to determine the effect of Fe-MNZ addition on the ENM of CA in terms of porosity and adsorption capacity. Porometry results and contact angle measurements confirmed the increase in fiber diameter through the decrease in pore size and increase in the wettability of the ENMs produced. The adsorption experiment showed that ENM blend 2, M2, containing 1.0 wt.% Fe-MNZ had the highest removal efficiency for Ni2+ ions at around 79.20%, while ENM blend 3, M3, which contained 1.2 wt.% Fe-MNZ had adsorbed most of the Co2+ and Cu2+ ions with removal efficiencies equal to 54.04% and 100%, respectively. Adsorption of Ni2+ and Co2+ ions was governed by Freundlich isotherm and pseudo-first order kinetics, whereas the adsorption data of Cu2+ ions best fitted both Langmuir and Freundlich isotherms, and pseudo-second order kinetics. Lastly, the adsorption of the heavy metal ions was verified by the results of SEM-EDX.
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