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Titolo:
Electroextraction of Pb2+ ions from diluted solutions by a process combining ion-exchange textiles and membranes
Autore:
Basta, K; Aliane, A; Lounis, A; Sandeaux, R; Sandeaux, J; Gavach, C;
Indirizzi:
CNRS,5,MR 5635, Lab Materiaux & Procedes Membranaires, F-34293 MontpellierCNRS Montpellier France 5 x & Procedes Membranaires, F-34293 Montpellier
Titolo Testata:
DESALINATION
fascicolo: 3, volume: 120, anno: 1998,
pagine: 175 - 184
SICI:
0011-9164(199812)120:3<175:EOPIFD>2.0.ZU;2-L
Fonte:
ISI
Lingua:
ENG
Keywords:
electroextraction; electroregeneration; ion-exchange textile; ion-exchange membrane; lead ion; low concentration;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Engineering, Computing & Technology
Citazioni:
13
Recensione:
Indirizzi per estratti:
Indirizzo: Gavach, C CNRS,342935635, Lab Materiaux & Procedes Membranaires, 1919 Route Mende, F- CNRS 1919 Route Mende Montpellier France 5 1919 Route Mende, F-
Citazione:
K. Basta et al., "Electroextraction of Pb2+ ions from diluted solutions by a process combining ion-exchange textiles and membranes", DESALINATN, 120(3), 1998, pp. 175-184

Abstract

The extraction of Pb2+ ions from diluted solutions was achieved using a hybrid process combining cation exchange textiles, ion-exchange membranes andelectric current. Two methods were investigated: an electroextraction process in two steps where the fixation of Pb2+ ions was followed by electroregeneration of the cation-exchange textiles; the second one a continuous electroextraction process where the ion exchange and regeneration take place simultaneously. For these electroextraction processes, the cation-exchange textile is introduced into an electrodialysis cell and compressed between twocation-exchange membranes. Under an applied current, the Pb2+ ions are substituted by regenerating ions coming from the anodic compartment and are transferred into a receiver compartment at the cathodic side where they are concentrated. Cation-exchange textiles having strong or weak acid functionalgroups, sulfonic (SCET) and carboxylic (CCET), respectively, were used. Different regenerating ions, H+, Na+, K+ and NH4+ were investigated under various current densities. Electroregeneration ratios between 85% and 100% were obtained with sulfonic and carboxylic textiles previously loaded with Pb2 ions. In the continuous electroextraction, removal efficiencies higher than 95% were obtained with a 10 ppm Pb2+ feed solution giving an outlet concentration of less than 1 ppm. The efficiency of the two textiles was compared in terms of mass transfer and energy consumption.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 04/12/20 alle ore 04:00:47