Abstract
The present study introduces the process performances of nitrophenols pertraction using new liquid supported membranes under the action of a magnetic field. The membrane system is based on the dispersion of silver–iron oxide nanoparticles in n-alcohols supported on hollow microporous polypropylene fibers. The iron oxide–silver nanoparticles are obtained directly through cyclic voltammetry electrolysis run in the presence of soluble silver complexes ([AgCl2]−; [Ag(S2O3)2]3−; [Ag(NH3)2]+) and using pure iron electrodes. The nanostructured particles are characterized morphologically and structurally by scanning electron microscopy (SEM and HFSEM), EDAX, XRD, and thermal analysis (TG, DSC). The performances of the nitrophenols permeation process are investigated in a variable magnetic field. These studies show that the flux and extraction efficiency have the highest values for the membrane system embedding iron oxide–silver nanoparticles obtained electrochemically in the presence of [Ag(NH3)2]+ electrolyte. It is demonstrated that the total flow of nitrophenols through the new membrane system depends on diffusion, convection, and silver-assisted transport.
Highlights
Bart Van der Bruggen underlined the impact of the nanomaterials’ development on the domain of membranes and membrane processes at the European Membrane Society Summer School, Bucharest 2010 when he stated that “the development of membranes research in the decade will be marked by the influence of various nanomaterials on obtaining membranes and membrane processes, but especially on their applications” [1]
Many nano species have been used in the preparation of membranes or processes involving membranes and their various applications, as follows: nano species derived from carbon [2,3]; metallic nanoparticles [4,5]; oxide nanoparticles [6,7,8,9]; polymeric nanoparticles [10,11]; proteins, and enzymes [12]
Numerous studies showed over time that the membranes could be homogeneous or heterogeneous; with symmetric or asymmetric structures; solid, or liquid; neutral, or positively/negatively charged; as well as porous or dense [46,47]
Summary
Bart Van der Bruggen underlined the impact of the nanomaterials’ development on the domain of membranes and membrane processes at the European Membrane Society Summer School, Bucharest 2010 when he stated that “the development of membranes research in the decade will be marked by the influence of various nanomaterials on obtaining membranes and membrane processes, but especially on their applications” [1]. The iron oxide nanoparticles with magnetic properties (maghemite or magnetite) generated a particular interest for studies on advanced membranes based on nanomaterials [13,14,15,16,17] For this purpose, a multitude of methods for obtaining the magnetic nanoparticles of magnetite are known today, including the co-precipitation method [18], sol–gel process [19], thermal decomposition [20], solvothermal procedure [21], hydrolysis and thermolysis of precursors [22], sonochemical method [23], electrodeposition [24], hydrothermal reactions [25], flow injection [26], microemulsion reactions [27], flame spray pyrolysis [28], vapor deposition [29], and microwave [30]. The membranes were used to transport o- and m-nitrophenols in the presence of an oscillating magnetic field
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
