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Article

Iron Molybdate Fe2(MoO4)3 Nanoparticles: Efficient Sorbent for Methylene Blue Dye Removal from Aqueous Solutions

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Petroleum Technology, Operated Offshore Oil Field Development, Qatar Petroleum, Doha P.O. Box 3212, Qatar
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Department of Chemistry, Faculty of Science, Taibah University, Al-Madinah Al-Munawarah P.O. Box 30002, Saudi Arabia
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Laboratory of Applied Organic Chemistry (LCOA), Chemistry Department, Faculty of Sciences and Techniques, Sidi Mohamed Ben Abdellah University, P.O. Box 2202, Imouzzer Road, 30000 Fez, Morocco
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Engineering Laboratory of Organometallic, Molecular Materials and Environment (LIMOME), Faculty of Sciences, Chemistry Department, Sidi Mohamed Ben Abdellah University, P.O. Box 1796 (Atlas), 30000 Fez, Morocco
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Department of Chemistry, Faculty of Science, Islamic University of Madinah, Al-Madinah Al-Munawarah 42351, Saudi Arabia
*
Author to whom correspondence should be addressed.
Academic Editor: Monika Wawrzkiewicz
Molecules 2020, 25(21), 5100; https://doi.org/10.3390/molecules25215100
Received: 29 September 2020 / Revised: 24 October 2020 / Accepted: 30 October 2020 / Published: 3 November 2020
(This article belongs to the Special Issue Recent Advances in Dyes Removal Technologies)
The present study investigated iron molybdate (Fe2(MoO4)3), synthesized via a simple method, as a nanosorbent for methylene blue (MB) dye removal from aqueous solutions. Investigations of the effects of several parameters like contact time, adsorbent dose, initial dye concentration, temperature and pH were carried out. The results showed that MB removal was affected, significantly, by adsorbent dose and pH. Interestingly, lower values of adsorbent dose resulted in the removal of higher amounts of MB. At the optimum pH, the removal efficiency of 99% was gained with an initial MB concentration of ≤60 ppm. The kinetic study specified an excellent correlation of the experimental results with the pseudo-second-order kinetics model. Thermodynamic studies proved a spontaneous, favorable and endothermic removal. The maximum amount of removal capacity of MB dye was 6173 mg/g, which was determined from the Langmuir model. The removal efficiency was shown to be retained after three cycles of reuse, as proven by thermal regeneration tests. The presence and adsorption of the dye onto the Fe2(MoO4)3 nanoparticle surface, as well as the regeneration of the latter, was ascertained by scanning electron microscopy (SEM) and Fourier-transform infrared spectroscopy (FTIR). These findings are indicative that the investigated nanosorbent is an excellent candidate for the removal of MB in wastewater. View Full-Text
Keywords: nanosorbent; Fe2(MoO4)3; removal; methylene blue; regeneration nanosorbent; Fe2(MoO4)3; removal; methylene blue; regeneration
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MDPI and ACS Style

Mohmoud, A.; Rakass, S.; Oudghiri Hassani, H.; Kooli, F.; Abboudi, M.; Ben Aoun, S. Iron Molybdate Fe2(MoO4)3 Nanoparticles: Efficient Sorbent for Methylene Blue Dye Removal from Aqueous Solutions. Molecules 2020, 25, 5100. https://doi.org/10.3390/molecules25215100

AMA Style

Mohmoud A, Rakass S, Oudghiri Hassani H, Kooli F, Abboudi M, Ben Aoun S. Iron Molybdate Fe2(MoO4)3 Nanoparticles: Efficient Sorbent for Methylene Blue Dye Removal from Aqueous Solutions. Molecules. 2020; 25(21):5100. https://doi.org/10.3390/molecules25215100

Chicago/Turabian Style

Mohmoud, Ahmed, Souad Rakass, Hicham Oudghiri Hassani, Fethi Kooli, Mostafa Abboudi, and Sami Ben Aoun. 2020. "Iron Molybdate Fe2(MoO4)3 Nanoparticles: Efficient Sorbent for Methylene Blue Dye Removal from Aqueous Solutions" Molecules 25, no. 21: 5100. https://doi.org/10.3390/molecules25215100

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