RT info:eu-repo/semantics/article
T1 Prediction of single salt rejection in nanofiltration membranes by independent measurements
A1 Silva, Verónica
A1 Montalvillo, Miguel
A1 Carmona del Río, Francisco Javier
A1 Palacio Martínez, Laura
A1 Hernández Giménez, Antonio
A1 Prádanos del Pico, Pedro Lourdes
K1 Impedance spectroscopy
K1 Nanofiltration
K1 Membrane potential
K1 Transport numbers
K1 Dielectric properties
AB In this work amethod is proposed to predict salt rejection by nanofiltration. The procedure starts fromthe steric,electric and dielectric exclusion model with charge (and permitivity) depending on the concentration along thepore, SEDE-VCh, for membrane characterization, and substitutes all fitting parameters by values obtained byindependent methods. These parameters are the relative permittivity inside the pores and the two constantsof the Freundlich isothermfor the volumetric charge density,which can be obtained by impedance spectroscopytechniques. Moreover, the pore size and shape and the active layer thickness are required to complement themodel. The pore size was obtained by using a neutral solute rejection test and the active layer thickness wasestimated by SEM. Therefore, the model also requires pore shape as input. AFM measurements suggest theassumption of a slit shape for the pores.A Desal-HL membrane has been structurally, electrically and functionally characterized. These data allowedthe testing of the predictive model that was subsequently demonstrated; as far as results are good enoughconsidering the complexity of the mechanisms involved. Consequently, it seems clear that once the modelparameters have been obtained by independent methods, it can be used as a predictive tool.
PB Elsevier
SN 0011-9164
YR 2016
FD 2016
LK http://uvadoc.uva.es/handle/10324/21901
UL http://uvadoc.uva.es/handle/10324/21901
LA eng
NO Desalination 2016, vol.  382, p.  1–12
NO Producción Científica
DS UVaDOC
RD 25-nov-2024