Per accedir als documents amb el text complet, si us plau, seguiu el següent enllaç: http://hdl.handle.net/2117/89222

Títol:	Rejection of ammonium and nitrate from sodium chloride solutions by nanofiltration: Effect of dominant-salt concentration on the trace-ion rejection
Autor/a:	Reig i Amat, Mònica; Licon Bernal, Edxon Eduardo; Gibert Agulló, Oriol; Yaroshchuk, Andriy; Cortina Pallás, José Luís
Altres autors:	Universitat Politècnica de Catalunya. Departament d'Enginyeria Química; Universitat Politècnica de Catalunya. SETRI - Grup de Tècniques de Separació i Tractament de Residus Industrials
Abstract:	In this work, the rejection of two ions associated with fertilizer pollution of ground water (NH4+ and NO3-) by a polyamide nanofiltration (NF270) membrane was studied. Sodium chloride was selected as the dominant salt and the effect of its concentration on the NH4+ and NO3- rejections was evaluated. Filtration experiments were carried out in a cross-flow setup with a rectangular spacer-filled feed channel. The solution-diffusion-electro-migration-film model (SDEFM), previously developed to model the pressure-driven trans-membrane transfer of electrolyte mixtures consisting of a single dominant salt and (any number of) trace ions, was used to obtain membrane ion permeance from the experimental data. In this way, the membrane permeances with respect to single ions (Na+, Cl-, NH4+, NO3-) were obtained for various concentrations of both dominant (0.05 to 0.3 M NaCl) and trace salts (0.001 to 0.003 M NH4Cl/NaNO3). It was observed that when the dominant salt concentration increased, the rejections of dominant salt and trace ions decreased, whereas the membrane permeances to ions increased. This information can be useful for developing design tools for nanofiltration of mixed electrolyte solutions in water-treatment applications.
Abstract:	Peer Reviewed
Matèries:	-Àrees temàtiques de la UPC::Enginyeria química -ion rejection -nitrate and ammonium -dominant salt -trace ion -concentration effect -ionic permeance -Aigües subterrànies -- Contaminació
Drets:	http://creativecommons.org/licenses/by-nc-nd/3.0/es/
Tipus de document:	Article - Versió presentada Article
Publicat per:	Elsevier
Compartir:

Mostra el registre complet del document