Autor según el artículo: Boudaoud N; Miloudi H; Bouazza D; Adjdir M; Tayeb A; Fortuny A; Demey H; Sastre AM

Departamento: Enginyeria Química

Autor/es de la URV: Fortuny Sanromà, Agustín

Palabras clave: Zinc Sorption Layered double hydroxides (ldh) Impregnation Cyanex 272 sorption layered double hydroxides (ldh) impregnation cyanex 272

Resumen: © 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.

Áreas temáticas: 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

Acceso a la licencia de uso: https://creativecommons.org/licenses/by/3.0/es/

ISSN: 1420-3049

Direcció de correo del autor: agustin.fortuny@urv.cat

Fecha de alta del registro: 2023-02-19

Volumen de revista: 25

Versión del articulo depositado: info:eu-repo/semantics/publishedVersion

Enlace a la fuente original: https://www.mdpi.com/1420-3049/25/6/1263

URL Documento de licencia: http://repositori.urv.cat/ca/proteccio-de-dades/

Referencia al articulo segun fuente origial: Molecules. 25 (6):

Referencia de l'ítem segons les normes 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

DOI del artículo: 10.3390/molecules25061263

Entidad: Universitat Rovira i Virgili

Año de publicación de la revista: 2020

Tipo de publicación: Journal Publications