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Synthesis of S-ligand tethered cellulose nanofibers for efficient removal of Pb(II) and Cd(II) ions from synthetic and industrial wastewater

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Date
2018
Author(s)
Abu-Danso, Emmanuel
Peräniemi, Sirpa
Leiviskä, Tiina
Bhatnagar, Amit
Unique identifier
10.1016/j.envpol.2018.07.044
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Citation
Abu-Danso, Emmanuel. Peräniemi, Sirpa. Leiviskä, Tiina. Bhatnagar, Amit. (2018). Synthesis of S-ligand tethered cellulose nanofibers for efficient removal of Pb(II) and Cd(II) ions from synthetic and industrial wastewater.  ENVIRONMENTAL POLLUTION, 242 (Part B) , 1988-1997. 10.1016/j.envpol.2018.07.044.
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© Elsevier Ltd
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CC BY-NC-ND https://creativecommons.org/licenses/by-nc-nd/4.0/
Abstract

Cellulose nanofibers (CNFs) tethered with sulphur as anionic ligand were synthesized from medical absorbent cotton by dissolution with NaOH, CO(NH2)₂ followed by mechanical intrusion of sulphur from SC(NH₂)₂ at an elevated temperature. The solid-phase CNFs embedded with sulphur complexes possessed negative sites which were used to remove cationic metals viz., Pb(II) and Cd(II) from synthetic and industrial wastewater. The physicochemical properties of the CNFs were analyzed by Fourier transform infrared (FT-IR) spectroscopy, scanning electron microscopy (SEM), pH at point of zero charge (pHpzc) and X-ray photoelectron spectroscopy (XPS). Batch adsorption studies were conducted with synthetic wastewater to optimize the conditions for Pb(II) and Cd(II) removal by CNFs. Different adsorption kinetic models were applied to assess and define the adsorption mechanism. The maximum Langmuir adsorption capacity was found to be 1.16 and 0.82 mmol g−1 for Pb(II) and Cd(II) ions, respectively. Regeneration studies showed that the CNFs can be reused using 0.1 M NaOH as eluent. The percentage removal efficiency of different cationic metals by CNFs from untreated industrial wastewater ranged from ca. 90–98%.

Subjects
cellulose nanofibers   sulphur ligand   adsorption   lead   cadmium   modelling   
URI
https://erepo.uef.fi/handle/123456789/6935
Link to the original item
http://dx.doi.org/10.1016/j.envpol.2018.07.044
Publisher
Elsevier BV
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  • Luonnontieteiden ja metsätieteiden tiedekunta [1053]
University of Eastern Finland
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