Synthesis and characterization of multi-carboxyl functionalized nanocellulose/graphene oxide-zinc oxide composite for the adsorption of uranium (VI) from aqueous solutions: Kinetic and equilibrium profiles. (2021)

• Record Type: Journal Article
• Authors: Radhakrishnan, Asha; Nahi, J.; Beena, B.
• Is Part Of: Materials today. Volume 41:Part 3(2021)
• Page Start: 557
• Page End: 563
• Publication Date: 2021
• Subjects: Nano cellulose/Graphene oxide-zinc oxide -- Adsorption -- Cellulose; Materials science -- Congresses -- Periodicals; 620.1
• DOI: 10.1016/j.matpr.2020.05.249
• Languages: English
• ISSNs: 2214-7853

Abstract

Abstract: The present study is the preparation of the novel adsorbent, multi-carboxyl-functionalized Nanocellulose/Graphene Oxide-Zinc Oxide composite for the removal of Uranium. Fourier transforms infrared spectroscopy (FTIR), X-ray diffraction (XRD) and Scanning Electron Microscopy (SEM) studies have helped to characterize the composite. In this work the Nanocellulose/Graphene Oxide-Zinc Oxide composite were synthesized to compare the selective adsorption behavior for hazardous metal ion such as Uranium ions. From the adsorption studies, it would be clear that Nanocellulose/Graphene Oxide-Zinc Oxide composite exhibited much higher adsorption performance than individual Nanocellulose (NC) and Graphene Oxide-Zinc Oxide ( ZnO-GO). The kinetic data followed the pseudo-second-order model. The equilibrium attained at 120 min and isotherm follows the order Sips > Langmuir > Freundlich. The adsorbed Uranium is desorbed using 0.1 M HCl. The adsorption–desorption studies conducted over 6 cycles illustrate the viability and repeated use of the adsorbent for the removal of Uranium from aqueous solutions.