DSM : Thesis SL-DSM-14-0435

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Research field

Soft matter and complex fluids / Solid state physics, chemistry and nanosciences
Ultra-divided matter, Physical sciences for materials / Solid state physics, chemistry and nanosciences

Title

Microfluidic/Liquid-liquid extraction: role of the interface in extraction kinetics

Abstract

Microfluidic/Liquid-liquid extraction: role of the interface in extraction kinetics

Florent Malloggi, Valérie Geertsen, Fabienne Testard



The liquid-liquid interface where the hydrophobic species can react with the hydrophilic species plays a key role in the processes of extraction or liquid-liquid mass transfer. The special case of transfer of salts is found both in natural processes but also in many industrial applications, although the mechanisms involved at the interface are not well understood. The flexible nature of the interface combined to low concentrations entail difficult in situ experimental measures.

The specific tools micro / nanofluidic developed these last years offer new perspectives in terms of mechanistic study of interfacial reactions and development of new reactions in confined areas. In these systems, the specific surface areas are large and diffusion distances and low fluid management (and therefore reactive) controlled. Many examples have demonstrated the interest of these tools for the study or development of systems based on interfacial reactions. The microfluidic tool allows to control the interface by making the interfacial reactions predominating over bulk ones and providing thus the opportunity to analyze the liquid - liquid extraction kinetics.

This thesis focuses on liquid-liquid extraction of salts by microfluidics. The objective is to determine the structure of the parallel interface and the kinetics of extraction through this very same interface for a rational control of the extraction kinetics. Three major classes of techniques are used in this thesis,

Microfluidic tools (manufacture and management chips ETDE fluids) , analytical techniques to determine speciation in different phases (ICP-MS, UV, fluorescence ..), the techniques of structural analysis and surface (SAXS, SANS, X-reflectivity, neutron, ...).

Besides a fundamental interest, this topic is directly related to salt mining applications for the treatment waste, but also for purification processes.

Location

Institut rayonnement et matière de Saclay
Service Nanosciences et Innovation pour les Materiaux, la Biomédecine et l'Energie
Laboratoire Interdisciplinaire sur l'Organisation Nanométrique et Supramoléculaire
Centre : Saclay
Starting date : 01/10/2013

Contact person

Florent Malloggi
CEA / DSM/IRAMIS/NIMBE/LIONS
UMR 3299 CEA/CNRS

DSM/IRAMIS/NIMBE/LIONS

Bât.125, Pce 138C

CEA Saclay, F-91191 Gif-sur Yvette, France

Tel: +33.(0)1.69.08.63.28

Fax: +33.(0)1.69.08.66.40

Email: florent.malloggi@cea.fr


Phone : 33 (0 )1 69 08 23 55

More about

http://iramis.cea.fr/scm/lions/equipe.php
http://iramis-i.cea.fr/sis2m/Pho...Pisp/index.php?nom=fabienne.testard

University / Graduate School

Versailles-St-Quentin-en-Yvelines
Sciences et Technologies de Versailles - UVSQ -

Thesis supervisor

Fabienne TESTARD
CEA / DSM/IRAMIS/NIMBE/LIONS
CEA Saclay

UMR 3299

DSM/IRAMIS/NIMBE/LIONS

Bât.125, Pce 45A

91191 Gif-sur-Yvette Cedex


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