Poly ethylene oxide (PEO)/Chitosan nanofiber membrane was prepared by the electrospinning technique; afterward, the potential of the prepared nanofiber membrane for adsorption of nickel (Ni), cadmium (Cd), lead (Pb) and copper (Cu) from aqueous solution was investigated. The applied voltage, tip-collector distance and solution flow rate of electrospinning process were 20 kV, 13.5 cm and 0.5 mL h(-1) respectively. The prepared nanofibers were characterized by Fourier Transform Infrared (FTIR), Scanning Electron Microscope (SEM) and Brunauer-Emmert-Teller (BET) analysis. Based on results, the homogeneous electrospun nanofibers with the average diameter and surface area of 98 nm and 312.2 m(2) g(-1) were obtained respectively. Then, the adsorption experiments were carried out to investigate the effect of different adsorption parameters such as contact time, initial concentration and temperature in a batch system. The sorption selectivity of lead, copper, cadmium and nickel onto the membrane was in order of Pb(II)

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