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Adsorptive removal of V(V) ions using clinoptilolite modified with polypyrrole and iron oxide nanoparticles in column studies

Published online by Cambridge University Press:  01 March 2018

NOMCEBO H. MTHOMBENI ,
SANDRINE MBAKOP ,
AOYI OCHIENG  and
MAURICE S. ONYANGO
NOMCEBO H. MTHOMBENI*
Affiliation:
Department of Civil and Chemical Engineering, University of South Africa (UNISA), Roodeport, South Africa,
SANDRINE MBAKOP
Affiliation:
Department of Chemical, Metallurgical and Materials Engineering, Tshwane University of Technology, Pretoria, South Africa
AOYI OCHIENG
Affiliation:
Department of Chemical Engineering, Vaal University of Technology, Vanderbiljpark, South Africa
MAURICE S. ONYANGO
Affiliation:
Department of Chemical, Metallurgical and Materials Engineering, Tshwane University of Technology, Pretoria, South Africa
*
*Corresponding Author: Dr Nomcebo Mthombeni mthomnh@unisa.ac.za ; cebozwee@icloud.com
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Abstract

Clinoptilolite modified with polypyrrole and iron oxide nanoparticles (Cln-PPy-Fe3O4) nanocomposite as a potential adsorbent for V (V) ions was prepared via polymerization of pyrrole monomer using FeCl3 oxidant in aqueous medium in which clinoptilolite-Fe3O4 nanoparticles were suspended. The structure and morphology of the prepared adsorbent was analysed with the Fourier transform infrared (FTIR) spectrometer, field-emission scanning electron microscope (FE-SEM), energy dispersive X-ray spectroscopy (EDX) and high-resolution transmission electron microscope (HR-TEM). Column fixed bed studies were performed to test the ability of the adsorbent to remove V (V) ions from aqueous solution. Low values of adsorbent exhaustion rate (AER) and large bed volumes were observed at lower metal ion concentration, higher bed mass and lower flow rate for V(V) removal indicating good performance. The volume of treated water processed at breakthrough point were found to be 0.09; 0.63 and 1.26 L for bed mass of 1, 2.5; and 5 g, respectively. The Yoon–Nelson and Thomas models appropriately described the breakthrough curves.

Keywords

adsorptionV
Type
Articles
Information
MRS Advances , Volume 3 , Issue 36: African Materials Research Society 2017 , 2018 , pp. 2119 - 2127
Copyright
Copyright © Materials Research Society 2018 

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