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Kinetic Study of Copper(II) Simultaneous Extraction/Stripping from Aqueous Solutions by Bulk Liquid Membranes Using Coupled Transport Mechanisms

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Departamento de Ingeniería Química y Ambiental, Universidad Politécnica de Cartagena, 30203 Cartagena, Spain
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Departamento de Ciencias Politécnicas, UCAM, Campus de los Jerónimos, Guadalupe, 30107 Murcia, Spain
*
Author to whom correspondence should be addressed.
Academic Editor: Hugo F. Lopez
Metals 2016, 6(9), 212; https://doi.org/10.3390/met6090212
Received: 5 July 2016 / Revised: 26 August 2016 / Accepted: 29 August 2016 / Published: 2 September 2016
Heavy metals removal/recovery from industrial wastewater has become a prime concern for both economic and environmental reasons. This paper describes a comparative kinetic study of the removal/recovery of copper(II) from aqueous solutions by bulk liquid membrane using two types of coupled facilitated transport mechanisms and three carriers of different chemical nature: benzoylacetone, 8-hydroxyquinoline, and tri-n-octylamine. The results are analyzed by means of a kinetic model involving two consecutive irreversible first-order reactions (extraction and stripping). Rate constants and efficiencies of the extraction (k1, EE) and the stripping (k2, SE) reactions, and maximum fluxes through the membrane, were determined for the three carriers to compare their efficiency in the Cu(II) removal/recovery process. Counter-facilitated transport mechanism using benzoylacetone as carrier and protons as counterions led to higher maximum flux and higher extraction and stripping efficiencies due to the higher values of both the extraction and the stripping rate constants. Acceptable linear relationships between EE and k1, and between SE and k2, were found. View Full-Text
Keywords: copper(II); removal/recovery; bulk liquid membrane; kinetics; coupled facilitated transports copper(II); removal/recovery; bulk liquid membrane; kinetics; coupled facilitated transports
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MDPI and ACS Style

León, L.; León, G.; Senent, J.; Guzmán, M.A. Kinetic Study of Copper(II) Simultaneous Extraction/Stripping from Aqueous Solutions by Bulk Liquid Membranes Using Coupled Transport Mechanisms. Metals 2016, 6, 212.

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