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Article

Removal of Zinc from Aqueous Solutions Using Lamellar Double Hydroxide Materials Impregnated with Cyanex 272: Characterization and Sorption Studies

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Laboratory of Chemistry of Materials, University of Oran1, B.P 1524 El M’naouer-Oran, Algeria
2
Department of Chemical Engineering, Universitat Politècnica de Catalunya, ETSEIB, Diagonal 647, 08028 Barcelona, Spain
3
Faculty of technology, Department of engineering process, University of Saïda Dr. Tahar Moulay, 20000 Saida, Algeria
*
Authors to whom correspondence should be addressed.
Molecules 2020, 25(6), 1263; https://doi.org/10.3390/molecules25061263
Received: 20 January 2020 / Revised: 28 February 2020 / Accepted: 5 March 2020 / Published: 11 March 2020
(This article belongs to the Special Issue Advanced Materials and Technologies for Wastewater Treatment)
Removal of heavy metals from wastewater is mandatory in order to avoid water pollution of natural reservoirs. In the present study, layered double hydroxide (LDH) materials were evaluated for removal of zinc from aqueous solutions. Materials thus prepared were impregnated with cyanex 272 using the dry method. These materials were characterized through X-ray diffraction (XRD), Fourier transform infrared (FTIR), and thermal analysis. Batch shaking adsorption experiments were performed in order to examine contact time and extraction capacity in the removal process. Results showed that the equilibrium time of Zn (II) extraction is about 4 h for Mg2Al-CO3 and Mg2Al-CO3-cyanex 272, 6 h for Zn2Al-CO3, and 24 h for Zn2Al-CO3-cyanex 272. The experimental equilibrium data were tested for Langmuir, and Freundlich isotherm models. Correlation coefficients indicate that experimental results are in a good agreement with Langmuir’s model for zinc ions. Pseudo-first, second-order, Elovich, and intraparticular kinetic models were used to describe kinetic data. It was determined that removal of Zn2+ was well-fitted by a second-order reaction kinetic. A maximum capacity of 280 mg/g was obtained by Zn2Al-CO3-cyanex 272. View Full-Text
Keywords: cyanex 272; impregnation; layered double hydroxides (LDH); sorption; zinc cyanex 272; impregnation; layered double hydroxides (LDH); sorption; zinc
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MDPI and ACS Style

Boudaoud, N.; Miloudi, H.; Bouazza, D.; Adjdir, M.; Tayeb, A.; Fortuny, A.; Demey, H.; Sastre, A.M. Removal of Zinc from Aqueous Solutions Using Lamellar Double Hydroxide Materials Impregnated with Cyanex 272: Characterization and Sorption Studies. Molecules 2020, 25, 1263. https://doi.org/10.3390/molecules25061263

AMA Style

Boudaoud N, Miloudi H, Bouazza D, Adjdir M, Tayeb A, Fortuny A, Demey H, Sastre AM. Removal of Zinc from Aqueous Solutions Using Lamellar Double Hydroxide Materials Impregnated with Cyanex 272: Characterization and Sorption Studies. Molecules. 2020; 25(6):1263. https://doi.org/10.3390/molecules25061263

Chicago/Turabian Style

Boudaoud, Nacera, Hafida Miloudi, Djamila Bouazza, Mehdi Adjdir, Abdelkader Tayeb, Agustin Fortuny, Hary Demey, and Ana Maria Sastre. 2020. "Removal of Zinc from Aqueous Solutions Using Lamellar Double Hydroxide Materials Impregnated with Cyanex 272: Characterization and Sorption Studies" Molecules 25, no. 6: 1263. https://doi.org/10.3390/molecules25061263

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