Please use this identifier to cite or link to this item: https://doi.org/10.15480/882.1746
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DC FieldValueLanguage
dc.contributor.authorMantel, Tomi-
dc.contributor.authorBenne, Paul-
dc.contributor.authorParsin, Stanislav-
dc.contributor.authorErnst, Mathias-
dc.date.accessioned2018-09-25T08:09:11Z-
dc.date.available2018-09-25T08:09:11Z-
dc.date.issued2018-08-16-
dc.identifierdoi: 10.3390/membranes8030064-
dc.identifier.citationMembranes 8 (3): 64 (2018)de_DE
dc.identifier.issn2077-0375de_DE
dc.identifier.urihttp://tubdok.tub.tuhh.de/handle/11420/1749-
dc.description.abstractNext to the pore size distribution, surface charge is considered to be one main factor in the separation performance of ultrafiltration (UF) membranes. By applying an external surface potential onto an electro-conductive UF membrane, electrostatic induced rejection was investigated. This study introduces in a first part a relatively simple but yet not reported technology of membrane modification with direct current sputter deposition of ultrathin (15 nm) highly conductive gold layers. In a second part, characterization of the gold-coated UF flat sheet membrane with a molecular weight cut-off (MWCO) of 150 kDa is presented. Membrane parameters as contact angle (hydrophobicity), pure water permeability, MWCO, scanning electron microscopy imaging, zeta potential, surface conductivity and cyclic voltammetry of the virgin and the modified membrane are compared. Due to the coating, a high surface conductivity of 10 7 S m−1 was realized. Permeability of the modified membrane decreased by 40% but MWCO and contact angle remained almost unchanged. In a third part, cross-flow filtration experiments with negative charged Suwannee River Natural Organic Matter (SRNOM) are conducted at different cathodic and anodic applied potentials, different pH values (pH 4, 7, 10) and ionic strengths (0, 1, 10 mmol L−1). SRNOM rejection of not externally charged membrane was 28% in cross-flow and 5% in dead-end mode. Externally negative charged membrane (−1.5 V vs. Ag/AgCl) reached rejection of 64% which was close to the performance of commercial UF membrane with MWCO of 5 kDa. High ionic strengths or low pH of feed reduced the effect of electrostatic rejection.en
dc.description.sponsorshipDeutsche Forschungsgemeinschaft (DFG)de_DE
dc.language.isoende_DE
dc.publisherMultidisciplinary Digital Publishing Institutede_DE
dc.relation.ispartofMembranesde_DE
dc.rightsCC BY 4.0de_DE
dc.rightsinfo:eu-repo/semantics/openAccess-
dc.subjectelectro-conductive membranede_DE
dc.subjectelectro-enhanced rejectionde_DE
dc.subjectsurface chargede_DE
dc.subjectmembrane characterizationde_DE
dc.subjectelectro-ultrafiltrationde_DE
dc.subjectsurface coatingde_DE
dc.subject.ddc620: Ingenieurwissenschaftende_DE
dc.titleElectro-conductive composite gold-polyethersulfone-ultrafiltration-membrane : characterization of membrane and natural organic matter (NOM) filtration performance at different in-stiu applied surface potentialsde_DE
dc.typeArticlede_DE
dc.date.updated2018-09-21T07:11:40Z-
dc.identifier.urnurn:nbn:de:gbv:830-882.05834-
dc.identifier.doi10.15480/882.1746-
dc.type.diniarticle-
dc.subject.ddccode620-
dcterms.DCMITypeText-
tuhh.identifier.urnurn:nbn:de:gbv:830-882.05834de_DE
tuhh.oai.showtruede_DE
dc.identifier.hdl11420/1749-
tuhh.abstract.englishNext to the pore size distribution, surface charge is considered to be one main factor in the separation performance of ultrafiltration (UF) membranes. By applying an external surface potential onto an electro-conductive UF membrane, electrostatic induced rejection was investigated. This study introduces in a first part a relatively simple but yet not reported technology of membrane modification with direct current sputter deposition of ultrathin (15 nm) highly conductive gold layers. In a second part, characterization of the gold-coated UF flat sheet membrane with a molecular weight cut-off (MWCO) of 150 kDa is presented. Membrane parameters as contact angle (hydrophobicity), pure water permeability, MWCO, scanning electron microscopy imaging, zeta potential, surface conductivity and cyclic voltammetry of the virgin and the modified membrane are compared. Due to the coating, a high surface conductivity of 10 7 S m−1 was realized. Permeability of the modified membrane decreased by 40% but MWCO and contact angle remained almost unchanged. In a third part, cross-flow filtration experiments with negative charged Suwannee River Natural Organic Matter (SRNOM) are conducted at different cathodic and anodic applied potentials, different pH values (pH 4, 7, 10) and ionic strengths (0, 1, 10 mmol L−1). SRNOM rejection of not externally charged membrane was 28% in cross-flow and 5% in dead-end mode. Externally negative charged membrane (−1.5 V vs. Ag/AgCl) reached rejection of 64% which was close to the performance of commercial UF membrane with MWCO of 5 kDa. High ionic strengths or low pH of feed reduced the effect of electrostatic rejection.de_DE
tuhh.publication.instituteWasserressourcen und Wasserversorgung B-11de_DE
tuhh.identifier.doi10.15480/882.1746-
tuhh.type.opus(wissenschaftlicher) Artikelde
tuhh.institute.germanWasserressourcen und Wasserversorgung B-11de
tuhh.institute.englishWasserressourcen und Wasserversorgung B-11de_DE
tuhh.gvk.hasppnfalse-
tuhh.hasurnfalse-
openaire.rightsinfo:eu-repo/semantics/openAccessde_DE
dc.type.driverarticle-
dc.rights.ccbyde_DE
dc.rights.ccversion4.0de_DE
dc.type.casraiJournal Articleen
tuhh.container.issue3de_DE
tuhh.container.volume8de_DE
tuhh.container.startpageArt.-Nr. 64de_DE
dc.relation.projectEinfluss des Oberflächenpotentials von leitfähigen Polymermembranen auf das Fouling- und Trennverhalten in der Wasseraufbereitung (ZETA Membrane)de_DE
dc.rights.nationallicensefalsede_DE
item.fulltextWith Fulltext-
item.creatorOrcidMantel, Tomi-
item.creatorOrcidBenne, Paul-
item.creatorOrcidParsin, Stanislav-
item.creatorOrcidErnst, Mathias-
item.creatorGNDMantel, Tomi-
item.creatorGNDBenne, Paul-
item.creatorGNDParsin, Stanislav-
item.creatorGNDErnst, Mathias-
item.grantfulltextopen-
crisitem.author.deptUmwelttechnik und Energiewirtschaft V-9-
crisitem.author.deptWasserressourcen und Wasserversorgung B-11-
crisitem.author.orcid0000-0002-3606-5688-
crisitem.author.orcid0000-0001-9282-6683-
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