Process optimization and modeling of lead removal using maleate/PAN nanocomposite nanofibers: Characterization, kinetics and isotherm studies
Document Type
Article
Publication Date
1-1-2021
Abstract
This study aims to investigate the efficiency of lead (Pb) adsorption by adsorbent maleate/polyacrylonitrile nanocomposite using immersing the pristine electrospun (PAN) nanofibers. Characterizations such as field emission scanning electron microscopy, transmission electron microscopy, and Fourier transform infrared spectroscopy were applied to investigate the structure of the synthesized maleate nanoparticles. FESEM image indicates the smooth surface of the PAN nanofibers and the maleate nanoparticles coating on the electrospun PAN nanofibers surface. A four-factor central composite design was employed, with six replicas at the central points to optimize the process variables. The maximum Pb removal percentage of 98.5% was achieved at the initial concentration of 25 mg/L, an adsorbent dosage of 1.85 g/L, a pH of 6, and a contact time of 60 min. The adsorption process follows the Langmuir isotherm (R-2 = 0.99) and pseudo-second-order kinetics (R-2 = 0.99). The highest capacity of Pb ions adsorption through maleate/PAN nanocomposite was 349.15 mg/g that makes it a potential adsorbent in wastewater treatment.
Keywords
Adsorption, Electrospinning, Lead removal, Maleate nanoparticles, RSM
Divisions
fac_med
Funders
Student Research Committee, Shahid Sadoughi University of Medical Sciences, Yazd, Iran (IR.SSU.SPH.REC.1399.191),Student Research Committee, Shahid Sadoughi University of Medical Sciences, Yazd, Iran (8084)
Publication Title
Desalination and Water Treatment
Volume
210
Publisher
Desalination Publ
Publisher Location
36 WALCOTT VALLEY DRIVE,, HOPKINTON, MA 01748 USA