Adsorption behaviour of 2-mercaptobenzamide modified itaconic acid-grafted-magnetite nanocellulose composite for cadmium(II) from aqueous solutions

• Published in: Journal of industrial and engineering chemistry (Seoul, Korea) 2015, 32(0), , pp.157-166
• Main Authors: Anirudhan, T.S., Shainy, F.
• Format: Article
• Language: English
• Subjects: 2-Mercaptobenzamide; Adsorption; Cadmium(II); Graft co-polymerization; Magnetite nanocellulose; 화학공학
• ISSN: 1226-086X; 1876-794X
• DOI: 10.1016/j.jiec.2015.08.011

A novel adsorbent 2-mercaptobenzamide modified itaconic acid-grafted-magnetite nanocellulose composite [P(MB-IA)-g-MNCC] for the removal of Cd(II) ions from aqueous solutions. •P(MB-IA)-g-MNCC is an efficient adsorbent for the removal of cadmium(II) ions.•The maximum adsorption capacity was found to be 262.274mg/g.•P(MB-IA)-g-MNCC contains carboxyl and sulfhydryl groups.•The kinetic data were found to follow pseudo-second-order.•The thermodynamic parameters indicate the spontaneous and endothermic nature of adsorption process. In the present study, a cellulose based adsorbent, P(MB-IA)-g-MNCC was synthesized by graft co-polymerization of itaconic acid onto MNCC using EGDMA as crosslinking agent and K2S2O8 as free radical initiator. P(MB-IA)-g-MNCC was characterized by FTIR, XRD, SEM, TG and VSM. Cd(II) adsorption occurs maximum at pH 6.0. Kinetic and isotherm data were described using pseudo-second-order kinetic model and Sips isotherm model, respectively. Adsorbent dosage of 2.0g/L was sufficient for the complete removal of Cd(II) ions from aqueous solutions. The maximum adsorption capacity of P(MB-IA)-g-MNCC was found to be 262.27mg/g. Spent adsorbent was effectively regenerated using 0.1M HCl.