Aminated Acrylic Fabric Waste Derived Sorbent for Cd(II) Ion Removal from Aqueous Solutions: Mechanism, Equilibria and K
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ORIGINAL PAPER
Aminated Acrylic Fabric Waste Derived Sorbent for Cd(II) Ion Removal from Aqueous Solutions: Mechanism, Equilibria and Kinetics A. Hashem1 · M. F. Nasr1 · A. J. Fletcher2 · Latifa A. Mohamed3
© Springer Science+Business Media, LLC, part of Springer Nature 2020
Abstract An aminated acrylic fiber waste has been utilized as an adsorbent material for the removal of Cd(II) ions from aqueous solution after treatment of acrylic fiber waste with hydroxylamine hydrochloride under basic conditions, and characterized for surface chemistry, surface morphology and textural properties. The ability of this sorbent to adsorb Cd(II) ions was examined via batch adsorption methods, studying the effect of pH, sorbent and sorbate concentrations, as well as contact time. Results obtained confirm that this sorbent was effective for Cd(II) ion adsorption, with uptakes promoted by high active site density, however, the adsorption process is independent of sorbent surface area. The values obtained exceed those previously reported within the literature. Isotherm analysis using arrange of two- and three- parameter models, evaluated using non-linear regression methods with error analysis, showed that the Langmuir isotherm model most appropriately described the experimental data obtained, indicating mono layer adsorption occurs. Kinetic analysis using arrange of models in their non-linear forms provided mechanistic information, showing that pseudo -second-order behavior is involved. The synthesized aminated acrylic fiber waste derived sorbents offer significant potential for the removal of Cd(II) ions from aqueous solution through a mechanism of chelation between the electron- donating oxygen-and nitrogen-containing groups in the sorbent and the electron-accepting Cd(II) ions. Keywords Amination · Isotherm models · Kinetic models · FTIR · BET · SEM
Introduction Wastewater adulteration with significant levels of metal species is a genuine natural issue, with high potential impact as a consequence of the hazardous nature of such contaminants; this includes danger towards marine organisms, nonbiodegradability, bioaccumulation, and is compounded by the high capital expense of removing such pollutants from Electronic supplementary material The online version of this article (https://doi.org/10.1007/s10924-020-01863-z) contains supplementary material, which is available to authorized users. * A. Hashem [email protected] 1
Textile Research Division, National Research Center, Dokki, Cairo, Egypt
2
Department of Chemical and Process Engineering, University of Strathclyde, 75 Montrose Street, Glasgow G1 1XJ, UK
3
Microbial Chemistry Department, National Research Center, Dokki, Cairo, Egypt
wastewater. High levels of metals, e.g. cadmium, lead, mercury, copper, nickel and zinc, are found in mechanical wastewater releases as a consequence of highly polluting processes including mining and metallurgical practices, electroplating, and the creation of synthetic substances, for example, dyes, composts, and pestici
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