Adsorptive removal of congo red dye from aqueous solutions using Mo-doped CoFe2O4 magnetic nanoparticles
ISSN: 0369-9420
Article publication date: 8 February 2021
Issue publication date: 15 November 2021
Abstract
Purpose
The main purpose of this paper is to investigate the adsorption properties of CoFe1.9Mo0.1O4 magnetic nanoparticles (CFMo MNPs) using, anionic dye “congo red (CR)” as a model of water pollutants.
Design/methodology/approach
The magnetic nano-adsorbent was synthesized via sol-gel process. Different techniques including; Fourier transform infrared spectroscopy, point of zero charge, scanning electron microscope and X-ray powder diffraction were used to characterize the prepared adsorbent. Adsorption experiments were conducted in batch mode under various conditions (contact time, shaking speed, initial dye concentration, initial solution pH, solution temperature and adsorbent amount) to investigate the adsorption capability of CFMo MNPs for CR.
Findings
The results showed that, CFMo MNPs could successfully remove more than 90% of CR dye within 20 min. Adsorption kinetics and isotherms were better described using pseudo-second-order (PSO) and Langmuir models, respectively. The maximum adsorbed amount (qmax) of CR dye was 135.14 mg/g. The adsorption process was found to be endothermic and spontaneous in nature as demonstrated by the thermodynamics (
Practical implications
This study provided a good example of using an easily separated magnetic nano-adsorbent for fast removal of a very toxic organic pollutant, congo red, from the aquatic environment
Originality/value
The employment of Mo-doped cobalt ferrite for the first time for removing hazardous anionic dyes such as congo red from their aqueous solutions.
Keywords
Acknowledgements
The authors would like to thank the Chemistry Department, Sebha University, Sebha/Libya for their support. The authors thank the Libyan Petroleum Institute, Tripoli/Libya for performing XRD and SEM analysis. The authors thank the Nuclear Research Center, Tajoura, Libya for performing FTIR analysis.
Conflict of Interest: The authors declare no conflict of interests.
Citation
Amar, I.A., Asser, J.O., Mady, A.S., Abdulqadir, M.S., Altohami, F.A., Sharif, A.A. and Abdalsamed, I.A. (2021), "Adsorptive removal of congo red dye from aqueous solutions using Mo-doped CoFe2O4 magnetic nanoparticles", Pigment & Resin Technology, Vol. 50 No. 6, pp. 563-573. https://doi.org/10.1108/PRT-02-2020-0016
Publisher
:Emerald Publishing Limited
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