Micari, Marina und Diamantidou, Dionysia und Heijman, Bas und Moser, Massimo und Haidari, Amir und Spanjers, Henri und Bertsch, Valentin (2020) Experimental and Theoretical Characterization of Commercial Nanofiltration Membranes for the Treatment of Ion Exchange Spent Brine. Journal of Membrane Science. Elsevier. doi: 10.1016/j.memsci.2020.118117. ISSN 0376-7388.
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Kurzfassung
This work presents a joint experimental and simulation campaign aimed at characterizing two nanofiltration membranes (TS80 and NF270) in the presence of a multi-ionic water solution simulating the spent regenerant of cationic ion exchange resins employed for water softening. We identified the membrane parameters, which allowed for predicting the performances through the Donnan Steric Pore Model with Dielectric Exclusion. A good agreement between model and experimental trends of rejection as a function of the applied pressure was observed (error < 15%). The analysis of trans-membrane fluxes and exclusion coefficients showed that dielectric exclusion was the crucial mechanism for the ionic partition. In fact, the lower pore dielectric constant found for TS80 justified the higher rejections to divalent cations with respect to NF270. Moreover, negative charge densities were found for both membranes, because of the high concentration of chloride ions in the feed, which likely adsorbed onto the membrane. However, it was observed that the experimental rejections did not change significantly with the feed pH. This result, in line with the minor role of the Donnan exclusion resulting from the model, suggested that the membrane performances were not much affected by the charge density at high feed ionic strengths (~1 M).
elib-URL des Eintrags: | https://elib.dlr.de/135020/ | ||||||||||||||||||||||||||||||||
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Dokumentart: | Zeitschriftenbeitrag | ||||||||||||||||||||||||||||||||
Titel: | Experimental and Theoretical Characterization of Commercial Nanofiltration Membranes for the Treatment of Ion Exchange Spent Brine | ||||||||||||||||||||||||||||||||
Autoren: |
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Datum: | 2020 | ||||||||||||||||||||||||||||||||
Erschienen in: | Journal of Membrane Science | ||||||||||||||||||||||||||||||||
Referierte Publikation: | Ja | ||||||||||||||||||||||||||||||||
Open Access: | Ja | ||||||||||||||||||||||||||||||||
Gold Open Access: | Nein | ||||||||||||||||||||||||||||||||
In SCOPUS: | Ja | ||||||||||||||||||||||||||||||||
In ISI Web of Science: | Ja | ||||||||||||||||||||||||||||||||
DOI: | 10.1016/j.memsci.2020.118117 | ||||||||||||||||||||||||||||||||
Verlag: | Elsevier | ||||||||||||||||||||||||||||||||
Name der Reihe: | Elsevier | ||||||||||||||||||||||||||||||||
ISSN: | 0376-7388 | ||||||||||||||||||||||||||||||||
Status: | veröffentlicht | ||||||||||||||||||||||||||||||||
Stichwörter: | Nanofiltration Wastewater treatment Membrane characterization Ionic rejection Water softening | ||||||||||||||||||||||||||||||||
HGF - Forschungsbereich: | Energie | ||||||||||||||||||||||||||||||||
HGF - Programm: | TIG Technologie, Innovation und Gesellschaft | ||||||||||||||||||||||||||||||||
HGF - Programmthema: | Erneuerbare Energie- und Materialressourcen für eine nachhaltige Zukunft | ||||||||||||||||||||||||||||||||
DLR - Schwerpunkt: | Energie | ||||||||||||||||||||||||||||||||
DLR - Forschungsgebiet: | E SY - Energiesystemanalyse | ||||||||||||||||||||||||||||||||
DLR - Teilgebiet (Projekt, Vorhaben): | E - Energiesystemtechnik (alt) | ||||||||||||||||||||||||||||||||
Standort: | Stuttgart | ||||||||||||||||||||||||||||||||
Institute & Einrichtungen: | Institut für Technische Thermodynamik > Energiesystemanalyse | ||||||||||||||||||||||||||||||||
Hinterlegt von: | Micari, Marina | ||||||||||||||||||||||||||||||||
Hinterlegt am: | 20 Mai 2020 13:43 | ||||||||||||||||||||||||||||||||
Letzte Änderung: | 23 Okt 2023 14:08 |
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