Isotherm and Kinetic Modeling of Strontium Adsorption on Graphene Oxide. Academic Article

abstract

• In this study, graphene oxide (GO) was synthesized using Hummers method. The synthesized GO was characterized using field-emission scanning electron microscopy (FE-SEM), X-ray diffraction (XRD), Fourier transformed infrared (FTIR) spectroscopy, X-ray photoelectron spectroscopy (XPS), and Brunauer–Emmett–Teller (BET) nitrogen adsorption. The analyses confirmed the presence of oxygen functional groups (C=O and C-O-C) on the GO surface. These oxygen functional groups act as active sites in the adsorption Sr (II). The BET analysis revealed the surface area of GO of 232 m2/g with a pore volume of 0.40 cm3/g. The synthesized GO was used as an adsorbent for removing Sr (II) from aqueous solutions. The adsorption equilibrium and kinetic results were consistent with the Langmuir isotherm model and the pseudo-second-order kinetic model. A maximum strontium adsorption capacity of 131.4 mg/g was achieved. The results show that the GO has an excellent adsorption capability for removing Sr (II) from aqueous solutions and potential use in wastewater treatment applications.

authors

• Abdala, Ahmed

published proceedings

• Nanomaterials (Basel)

author list (cited authors)

• Abu-Nada, A., Abdala, A., & McKay, G.

citation count

• 1

complete list of authors

• Abu-Nada, Abdulrahman||Abdala, Ahmed||McKay, Gordon

publication date

• October 2021

publisher

• MDPI  Publisher

published in

• Nanomaterials  Journal

keywords

• Adsorption
• Adsorption Isotherms
• Adsorption Kinetics
• Graphene Oxide
• Strontium

PubMed Central ID

• 34835541

Digital Object Identifier (DOI)

• 10.3390/nano11112780

start page

• 2780

end page

• 2780

volume

• 11

issue

• 11

URL

• http://dx.doi.org/10.3390/nano11112780