Abstract
Effective Removal of Hexavalent Chromium from Aqueous Solutions Using Ionic Liquid Modified Graphene Oxide Sorbent
Highlights
Chromium is one of the heavy metals present in toxic effluents released by the aerospace, electroplating, leather, mining, dyeing, fertilizer, and photography industries[1,2]
The nitrogen adsorption-desorption isotherms of graphene oxide, reduced graphene oxide, and ionic liquid modified reduced graphene oxide show a type IV isotherm according to IUPAC classification, corresponding to mesoporous solids
Comparison of X-ray diffraction (XRD) pattern of Ionic liquid modified reduced graphene oxide (IL-rGO) and rGO with GO, suggested that the basal spacing between the (002) planes increased from 0.35 nm to about 0.8 nm, which was signified by a new broad peak at 2θ = 11.8o replacing the peak at 2θ = 25.4o
Summary
The sorption behavior of chromate on the ionic liquid modified reduced graphene oxide sorbent from an aqueous medium was studied by varying the parameters such as contact time, initial chromate concentration, pH, and agitation speed. The sorption isotherm studies revealed that Langmuir model provided the best fit to all the experimental data with an adsorption capacity of 232.55 mg g–1 for IL-rGO. Thermodynamic parameters, such as Gibbs free energy (–2.85 kJ mol–1 at 298 K), enthalpy (55.41 kJ mol–1), and entropy (11.64 J mol–1 K–1) of sorption of the chromate on ionic liquid modified reduced graphene oxide was evaluated, and it was found that the reaction was spontaneous and endothermic in nature
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
