Removal of Pb (II) ions using polymer based graphene oxide magnetic nano-sorbent

Ravishankar, Harish, Wang, Jinfeng, Shu, Li and Jegatheesan, Veeriah 2016, Removal of Pb (II) ions using polymer based graphene oxide magnetic nano-sorbent, Process safety and environmental protection, vol. 104, no. Part B, pp. 472-480, doi: 10.1016/j.psep.2016.04.002.

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Title Removal of Pb (II) ions using polymer based graphene oxide magnetic nano-sorbent
Author(s) Ravishankar, Harish
Wang, JinfengORCID iD for Wang, Jinfeng
Shu, Li
Jegatheesan, Veeriah
Journal name Process safety and environmental protection
Volume number 104
Issue number Part B
Start page 472
End page 480
Total pages 9
Publisher Elsevier
Place of publication Amsterdam, The Netherlands
Publication date 2016-11
ISSN 0957-5820
Keyword(s) graphene oxide
magnetic nano-sorbent
lead ions
magnetic separation
electrostatic interaction/chelation
Summary Graphene oxide (GO) based magnetic nano-sorbent was synthesized by assembling the Fe3O4 and GO on the surface of polystyrene (denoted as PS@Fe3O4@GO). The morphology of the nano-sorbent was studied using scanning electron microscopy (SEM), while their individual nano-components were characterized using UV-visible spectroscopy, atomic force microscopy (AFM), zeta potential, transmission electron microscopy (TEM) and scanning electron microscopy (SEM). The assembled nano-sorbent was further investigated for Pb (II) ions removal by optimizing the parameters including pH, temperature and contact time. The obtained data was modelled for adsorption kinetics, adsorption isotherms and thermodynamics. Kinetic experiments indicated the Pb (II) adsorption followed first order kinetics. The adsorption equilibrium data fits Langmuir isotherm model well and the adsorption process was found to be spontaneous. The adsorption capacity of the prepared nano-sorbent was estimated to be 73.52mgg-1, with a maximum removal of 93.78% at pH 6. The nano-sorbent can be regenerated by nitric acid (HNO3) for reuse. FT-IR and X-ray photoelectron spectroscopy (XPS) studies confirmed the interactions between the Pb (II) ions and the nano-sorbent.
Language eng
DOI 10.1016/j.psep.2016.04.002
Field of Research 090406 Powder and Particle Technology
050205 Environmental Management
030304 Physical Chemistry of Materials
Socio Economic Objective 961103 Physical and Chemical Conditions of Water in Fresh
HERDC Research category C1 Refereed article in a scholarly journal
ERA Research output type C Journal article
Copyright notice ©2016, The Institution of Chemical Engineers
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