Author, as appears in the article.: Boudaoud N; Miloudi H; Bouazza D; Adjdir M; Tayeb A; Fortuny A; Demey H; Sastre AM
Department: Enginyeria Química
URV's Author/s: Fortuny Sanromà, Agustín
Keywords: Zinc Sorption Layered double hydroxides (ldh) Impregnation Cyanex 272 sorption layered double hydroxides (ldh) impregnation cyanex 272
Abstract: © 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). 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.
Thematic Areas: Zootecnia / recursos pesqueiros Saúde coletiva Química Psicología Planejamento urbano e regional / demografia Physical and theoretical chemistry Pharmaceutical science Organic chemistry Odontología Nutrição Molecular medicine Medicine (miscellaneous) Medicina veterinaria Medicina iii Medicina ii Medicina i Materiais Matemática / probabilidade e estatística Interdisciplinar Geografía General medicine Farmacia Ensino Engenharias iv Engenharias iii Engenharias ii Engenharias i Educação física Economia Drug discovery Ciências biológicas iii Ciências biológicas ii Ciências biológicas i Ciências ambientais Ciências agrárias i Ciência de alimentos Ciência da computação Chemistry, organic Chemistry, multidisciplinary Chemistry (miscellaneous) Biotecnología Biodiversidade Biochemistry & molecular biology Astronomia / física Analytical chemistry
licence for use: https://creativecommons.org/licenses/by/3.0/es/
ISSN: 1420-3049
Author's mail: agustin.fortuny@urv.cat
Record's date: 2023-02-19
Journal volume: 25
Papper version: info:eu-repo/semantics/publishedVersion
Link to the original source: https://www.mdpi.com/1420-3049/25/6/1263
Papper original source: Molecules. 25 (6):
APA: Boudaoud N; Miloudi H; Bouazza D; Adjdir M; Tayeb A; Fortuny A; Demey H; Sastre AM (2020). Removal of zinc from aqueous solutions using lamellar double hydroxide materials impregnated with Cyanex 272: Characterization and sorption studies. Molecules, 25(6), -. DOI: 10.3390/molecules25061263
Licence document URL: https://repositori.urv.cat/ca/proteccio-de-dades/
Article's DOI: 10.3390/molecules25061263
Entity: Universitat Rovira i Virgili
Journal publication year: 2020
Publication Type: Journal Publications
Repositori URV