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The Effect of the Activation Process and Metal Oxide Addition (CaO, MgO, SrO) on the Catalytic and Physicochemical Properties of Natural Zeolite in Transesterification Reaction
Article

FAU-Type Zeolite Synthesis from Clays and Its Use for the Simultaneous Adsorption of Five Divalent Metals from Aqueous Solutions

Department of Natural Sciences, Manchester Metropolitan University, Chester Street, Manchester M1 5GD, UK
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Academic Editors: Miguel A. Camblor and Serena Esposito
Materials 2021, 14(13), 3738; https://doi.org/10.3390/ma14133738
Received: 29 April 2021 / Revised: 29 June 2021 / Accepted: 30 June 2021 / Published: 3 July 2021
(This article belongs to the Collection Porous Materials and Nanozeolites)
In this research, a vermiculite-kaolinite clay (VK) was used to prepare faujasite zeolites via alkaline fusion and hydrothermal crystallisation. The optimal synthesis conditions were 1 h fusion with NaOH at 800 °C, addition of deionised water to the fused sample at a sample to deionised water mass ratio of 1:5, 68 h of non-agitated ageing of the suspension, and 24 h of hydrothermal treatment at 90 °C. The efficacy of the prepared faujasite was compared to raw clay and a reference zeolite material through adsorption experiments of aqueous solutions containing five divalent cations—Cd, Co, Cu, Pb, and Zn. The results showed that in the presence of competing cations at concentrations of 300 mg L−1 and adsorbent loading of 5 g L−1, within the first 10 min, about 99% of Pb, 60% of Cu, 58% of Cd, 28% of Zn, and 19% of Co were removed by the faujasite prepared from clay. Two to four parameter nonlinear adsorption isotherms were used to fit the adsorption data and it was found that overall, three and four parameter isotherms had the best fit for the adsorption process. View Full-Text
Keywords: clay; faujasite; adsorption; nonlinear isotherm; heavy metals; zeolite synthesis clay; faujasite; adsorption; nonlinear isotherm; heavy metals; zeolite synthesis
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MDPI and ACS Style

Joseph, I.V.; Tosheva, L.; Miller, G.; Doyle, A.M. FAU-Type Zeolite Synthesis from Clays and Its Use for the Simultaneous Adsorption of Five Divalent Metals from Aqueous Solutions. Materials 2021, 14, 3738. https://doi.org/10.3390/ma14133738

AMA Style

Joseph IV, Tosheva L, Miller G, Doyle AM. FAU-Type Zeolite Synthesis from Clays and Its Use for the Simultaneous Adsorption of Five Divalent Metals from Aqueous Solutions. Materials. 2021; 14(13):3738. https://doi.org/10.3390/ma14133738

Chicago/Turabian Style

Joseph, Ifeoma V., Lubomira Tosheva, Gary Miller, and Aidan M. Doyle. 2021. "FAU-Type Zeolite Synthesis from Clays and Its Use for the Simultaneous Adsorption of Five Divalent Metals from Aqueous Solutions" Materials 14, no. 13: 3738. https://doi.org/10.3390/ma14133738

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