Separation of metals from aqueous solutions using polymeric membranes with novel extractants

Separation of metals from aqueous solutions using polymeric membranes with novel extractants

Gold is a valuable metal. Nowadays, there is interest in the recovery of this metal from primary and secondary sources (electronic waste). Membrane-based separation techniques have become increasingly important because by modifying their physical and chemical properties they result in their ability...

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Autores principales: Lemus-Solorio, Alfonso, Núñez-Gaytán, María Elena, Núñez-Gaytán, Ana María, Lemus-Solorio, Martha Angélica, Núñez-Hernández, Sandra
Formato: Online
Lenguaje:spa
Publicado: Universidad Autónoma de Baja California 2021
Acceso en línea:https://recit.uabc.mx/index.php/revista/article/view/90
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id recit-article-90
record_format ojs
institution RECIT
collection OJS
language spa
format Online
author Lemus-Solorio, Alfonso
Núñez-Gaytán, María Elena
Núñez-Gaytán, Ana María
Lemus-Solorio, Martha Angélica
Núñez-Hernández, Sandra
spellingShingle Lemus-Solorio, Alfonso
Núñez-Gaytán, María Elena
Núñez-Gaytán, Ana María
Lemus-Solorio, Martha Angélica
Núñez-Hernández, Sandra
Separation of metals from aqueous solutions using polymeric membranes with novel extractants
author_facet Lemus-Solorio, Alfonso
Núñez-Gaytán, María Elena
Núñez-Gaytán, Ana María
Lemus-Solorio, Martha Angélica
Núñez-Hernández, Sandra
author_sort Lemus-Solorio, Alfonso
title Separation of metals from aqueous solutions using polymeric membranes with novel extractants
title_short Separation of metals from aqueous solutions using polymeric membranes with novel extractants
title_full Separation of metals from aqueous solutions using polymeric membranes with novel extractants
title_fullStr Separation of metals from aqueous solutions using polymeric membranes with novel extractants
title_full_unstemmed Separation of metals from aqueous solutions using polymeric membranes with novel extractants
title_sort separation of metals from aqueous solutions using polymeric membranes with novel extractants
description Gold is a valuable metal. Nowadays, there is interest in the recovery of this metal from primary and secondary sources (electronic waste). Membrane-based separation techniques have become increasingly important because by modifying their physical and chemical properties they result in their ability to separate the analytes of interest. In this work, the efficiency in the separation and recovery of trace gold in 5 M HCl using a polymeric membrane system was studied. For this purpose, membranes with different composition of the polymeric support, plasticizer and carrier were synthesized. The polymer used was cellulose triacetate and as carrier and plasticizer an organic phosphate (tris(2-ethyl-hexyl) phosphate). A two-compartment cell separated by a polymeric membrane and with an agitation of 500 rpm was used. The operating cycle of the system was 180 min. The feed phase contained 0.2 mM gold (III) in a concentrated medium of 5 M hydrochloric acid and as recovery phase a saline solution. The membrane with the highest efficiency presented a carrier composition of 53.3% tris (2-ethyl-hexyl) phosphate. The gold concentration was measured with a UV-Vis spectrophotometer at a wavelength of 313 nm. Gold recovery was observed to be 76% in one cycle of operation. The carrier proved to be efficient for metal recovery in a concentrated 5 M hydrochloric acid medium.
publisher Universidad Autónoma de Baja California
publishDate 2021
url https://recit.uabc.mx/index.php/revista/article/view/90
_version_ 1792095371381440512
spelling recit-article-902022-10-26T16:43:34Z Separation of metals from aqueous solutions using polymeric membranes with novel extractants Separación de metales en soluciones acuosas mediante membranas poliméricas con extractantes novedosos Lemus-Solorio, Alfonso Núñez-Gaytán, María Elena Núñez-Gaytán, Ana María Lemus-Solorio, Martha Angélica Núñez-Hernández, Sandra Eficiencia de una membrana Permeabilidad Separación de metales preciosos Membranas poliméricas Acarreadores fosforados Membrane efficiency Permeability Precious metal separation Polymeric membranes Phosphorus carriers Gold is a valuable metal. Nowadays, there is interest in the recovery of this metal from primary and secondary sources (electronic waste). Membrane-based separation techniques have become increasingly important because by modifying their physical and chemical properties they result in their ability to separate the analytes of interest. In this work, the efficiency in the separation and recovery of trace gold in 5 M HCl using a polymeric membrane system was studied. For this purpose, membranes with different composition of the polymeric support, plasticizer and carrier were synthesized. The polymer used was cellulose triacetate and as carrier and plasticizer an organic phosphate (tris(2-ethyl-hexyl) phosphate). A two-compartment cell separated by a polymeric membrane and with an agitation of 500 rpm was used. The operating cycle of the system was 180 min. The feed phase contained 0.2 mM gold (III) in a concentrated medium of 5 M hydrochloric acid and as recovery phase a saline solution. The membrane with the highest efficiency presented a carrier composition of 53.3% tris (2-ethyl-hexyl) phosphate. The gold concentration was measured with a UV-Vis spectrophotometer at a wavelength of 313 nm. Gold recovery was observed to be 76% in one cycle of operation. The carrier proved to be efficient for metal recovery in a concentrated 5 M hydrochloric acid medium. El oro es un metal valioso. Hoy día, se tiene interés en la recuperación de este metal de fuentes primarias y secundarias (basura electrónica). Las técnicas de separación a base de membranas han incrementado su importancia ya que mediante la modificación de sus propiedades físicas y químicas dan como resultado su capacidad de separación de los analitos de interés. En este trabajo se estudió la eficiencia en la separación y recuperación de trazas de oro en HCl 5 M mediante un sistema de membranas poliméricas. Para ello, se sintetizaron membranas con diferente composición del soporte polimérico, plastificante y acarreador. El polímero utilizado fue el triacetato de celulosa y como acarreador y plastificante un fosfato orgánico (tris(2-etil-hexil) fosfato). Se utilizó una celda de dos compartimentos separados por la membrana polimérica y con una agitación de 500 rpm. El ciclo de operación del sistema fue de 180 minutos. La fase de alimentación contenía 0.2 mM de oro (III) en un medio concentrado de ácido clorhídrico 5 M y como fase de recuperación una solución salina. La membrana con mayor eficiencia presentó una composición del acarreador de 53.3% de tris(2-etil-hexil) fosfato. La concentración de oro se midió con un espectrofotómetro UV-Vis (modelo Lambda 40, marca Perkin-Elmer) a una longitud de onda de 313 nm. Se observó que la recuperación de oro es del 76% en un ciclo de operación. El acarreador demostró ser eficiente para la recuperación del metal en un medio concentrado de ácido clorhídrico 5 M.   Universidad Autónoma de Baja California 2021-07-05 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf text/html text/xml https://recit.uabc.mx/index.php/revista/article/view/90 10.37636/recit.v4299111 REVISTA DE CIENCIAS TECNOLÓGICAS; Vol. 4 No. 2 (2021): April-June; 99-111 REVISTA DE CIENCIAS TECNOLÓGICAS; Vol. 4 Núm. 2 (2021): Abril-Junio; 99-111 2594-1925 spa https://recit.uabc.mx/index.php/revista/article/view/90/258 https://recit.uabc.mx/index.php/revista/article/view/90/259 https://recit.uabc.mx/index.php/revista/article/view/90/260 Copyright (c) 2021 Alfonso Lemus-Solorio, María Elena Núñez-Gaytán, Ana María Núñez-Gaytán, Martha Angélica Lemus-Solorio, Sandra Núñez-Hernández https://creativecommons.org/licenses/by/4.0

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