Issue 1, 2020
From the journal:

RSC Advances

Removal of fluoride ions using a polypyrrole magnetic nanocomposite influenced by a rotating magnetic field

Uyiosa Osagie Aigbe,a   Robert Birundu Onyancha,*b   Kingsley Eghonghon Ukhurebor ORCID logo c  and  Kingsley Onyebuchi Obodo ORCID logo d  

* Corresponding authors

a Department of Physics, College of Science, Engineering and Technology, University of South Africa, Pretoria, South Africa

b School of Physical Sciences and Technology, Technical University of Kenya, Kenya
E-mail: 08muma@gmail.com
Tel: +254722545854

c Climatic/Environmental/Telecommunication Unit, Department of Physics, Edo University Iyamho, Edo, Nigeria

d HySA Infrastructure Centre of Competence, Faculty of Engineering, North-West University, South Africa

Abstract

The impact of a varying rotating magnetic field in stimulating adsorption of fluoride ions onto a polypyrrole magnetic nanocomposite synthesized via in situ a polymerization process was evaluated. Under the effect of a rotating magnetic field, improved removal of adsorbate (10 mg L−1) from aqueous solution using the polypyrrole magnetic nanocomposite was observed, with a maximum removal of 78.2% observed at a magnetic field intensity of 0.019 T. Particle aggregation resulting from the force owing to the gradient on the particles as the magnetic field was increased resulted in improved fluoride removal. This aggregation of particles leads to an improved chain collision and expanse of particle interaction with the fluoride solution. The process of adsorption of fluoride by the PPy/Fe3O4 nanocomposite followed both the Freudlich isotherm and the Temkin isotherm. Interestingly, under the effect of the rotating magnetic field, the adsorption process was best described by the Freundlich isotherm.

Graphical abstract: Removal of fluoride ions using a polypyrrole magnetic nanocomposite influenced by a rotating magnetic field

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Article information

DOI
https://doi.org/10.1039/C9RA07379E
Article type
Paper
Submitted
13 Sep 2019
Accepted
16 Dec 2019
First published
02 Jan 2020
This article is Open Access
Creative Commons BY-NC license

RSC Adv., 2020,10, 595-609

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Removal of fluoride ions using a polypyrrole magnetic nanocomposite influenced by a rotating magnetic field

U. O. Aigbe, R. B. Onyancha, K. E. Ukhurebor and K. O. Obodo, RSC Adv., 2020, 10, 595 DOI: 10.1039/C9RA07379E

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