Aplicación de las tecnologías de membrana líquida a procesos de interés industrial y medioambiental.

  1. León Pérez, Loreto
Supervised by:
  1. Javier Senent-Aparicio Director
  2. Gerardo León Albert Director

Defence university: Universidad Católica San Antonio de Murcia

Fecha de defensa: 25 July 2017

Committee:
  1. María Tejera de Torres Chair
  2. Julio Pérez Sánchez Secretary
  3. Emilio Meseguer Peña Committee member

Type: Thesis

Abstract

ABSTRACT The discharge of heavy metals into the environment is a serious problem facing numerous industries because they tend to accumulate in living organisms, causing various diseases and disorders, and inhibits biodegradation of organic pollutants. In the same way, the is equally complicated the separation of cobalt and nickel, in aqueous solution, due to their very close physicochemical properties. By other way, the need of high efficiencies on the chemical compound recovery and/or elimination processes makes necessary to look for new separation technologies in order to obtain higher performances at lower prices. Among these new technologies, the liquid membrane processes constitutes a relatively new emerging field in continuous growing due to their capacity to separate and concentrate compounds in only one step. In this Doctoral Thesis, by publications compendium, the possibility of an efficient use of liquid membranes to the separation of Co(II) and Ni(II) in aqueous solution, and to the remove (and recovery in many cases) of Cu(II), also in aqueous solution, is described. For that, characteristic parameters of these processes (efficacy, separation factor, and flux and permeability through feed/membrane and membrane/product interfaces) are obtained, analyzing the influence on them of the values of different operational variables and studying the kinetic law which governs the transport process (kinetic of two irreversible consecutive fist order reactions), all this, using different types of liquid membrane (bulk, supported and emulsion), different transport mechanisms (coupled co- and contra- transports), carriers of different chemical nature and different stripping agents. Results show that the liquid membrane technology is an effective technique to separate, remove, and even recover the studied chemical species. These results have been included in the following scientific publications: 1.- Separation of cobalt from nickel using novel ultrasound-prepared supported liquid membranes containing Cyanex 272 as Carrier. Physicochemical Problems of Mineral Processing. 52 (1) (2016) 77-86. 2.- Comparative study of copper (II) removal/recovery from aqueous solutions by bulk liquid membranes containing six different carriers. Metalurgija 56 (1-2) (2017) 153-156. 3.- Kinetic study of copper(II) simultaneous extraction/stripping from aqueous solutions by bulk liquid membranes using coupled transport mechanisms. Metals 6 (2016) 212. 4.- Optimization of Copper Removal from Aqueous Solutions Using Emulsion Liquid Membranes with Benzoylacetone as a Carrier. Metals 7 (2017) 19.