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dc.contributor.authorSchulz, Martin-
dc.contributor.authorBünting, Sönke-
dc.contributor.authorErnst, Mathias-
dc.date.accessioned2017-08-25T12:10:07Z-
dc.date.available2017-08-25T12:10:07Z-
dc.date.issued2017-08-03-
dc.identifierdoi: 10.3390/w9080580-
dc.identifier.citationWater 9 (2017), 8: 580de_DE
dc.identifier.issn2073-4441de_DE
dc.identifier.urihttp://tubdok.tub.tuhh.de/handle/11420/1418-
dc.description.abstractThe impact of structural properties of three commercial PACs as well as two mechanically ground PACs on their efficiency in NOM removal and fouling reduction in combined adsorption-ultrafiltration (PAC-UF) of northern German groundwater was investigated. All PACs showed highest adsorption affinity for medium molecular weight NOM fractions. The meso-pore surface area rather than the total surface area (B.E.T.) mainly governed the extent of NOM removal. However, adsorption of macromolecular NOM fractions, which were found to be the main contributor to total and irreversible fouling, was limited by tested commercial carbons, and no significant mitigation of fouling was achieved by any tested PAC concentration. Lowering the particle size by grinding of the PAC, however, enhanced removal of macromolecular NOM fractions considerably, and fouling mitigation occurred at substantially lower PAC concentrations compared to raw carbons. A larger external surface area probably let to more shell adsorption, a more homogeneous particle distribution on the membrane surface and a better mass transport. In addition, comparison of the adsorption isotherms of raw and milled PACs showed that, due to the grinding of PAC particles, additional inner pores structures became available for NOM adsorption. Results of this study point out that structural properties of PAC dramatically influence the efficiency of combined PAC-UF, which needs to be considered during PAC selection and process design.-
dc.description.abstractThe impact of structural properties of three commercial PACs as well as two mechanically ground PACs on their efficiency in NOM removal and fouling reduction in combined adsorption-ultrafiltration (PAC-UF) of northern German groundwater was investigated. All PACs showed highest adsorption affinity for medium molecular weight NOM fractions. The meso-pore surface area rather than the total surface area (B.E.T.) mainly governed the extent of NOM removal. However, adsorption of macromolecular NOM fractions, which were found to be the main contributor to total and irreversible fouling, was limited by tested commercial carbons, and no significant mitigation of fouling was achieved by any tested PAC concentration. Lowering the particle size by grinding of the PAC, however, enhanced removal of macromolecular NOM fractions considerably, and fouling mitigation occurred at substantially lower PAC concentrations compared to raw carbons. A larger external surface area probably let to more shell adsorption, a more homogeneous particle distribution on the membrane surface and a better mass transport. In addition, comparison of the adsorption isotherms of raw and milled PACs showed that, due to the grinding of PAC particles, additional inner pores structures became available for NOM adsorption. Results of this study point out that structural properties of PAC dramatically influence the efficiency of combined PAC-UF, which needs to be considered during PAC selection and process design.en
dc.language.isoende_DE
dc.publisherMultidisciplinary Digital Publishing Institutede_DE
dc.relation.ispartofWaterde_DE
dc.rightsCC BY 4.0de_DE
dc.rightsinfo:eu-repo/semantics/openAccess-
dc.subjectpowdered activated carbon (PAC)de_DE
dc.subjectultrafiltration (UF)de_DE
dc.subjectmembrane hybrid processesde_DE
dc.subjectNOM-removalde_DE
dc.subjectmembrane foulingde_DE
dc.subject.ddc620: Ingenieurwissenschaftende_DE
dc.titleImpact of powdered activated carbon structural properties on removal of organic foulants in combined adsorption-ultrafiltrationde_DE
dc.typeArticlede_DE
dc.date.updated2017-08-24T09:55:16Z-
dc.identifier.urnurn:nbn:de:gbv:830-882w02298-
dc.identifier.doi10.15480/882.1415-
dc.type.diniarticle-
dc.subject.ddccode620-
dcterms.DCMITypeText-
tuhh.identifier.urnurn:nbn:de:gbv:830-882w02298de_DE
tuhh.gvk.ppn896625435-
tuhh.oai.showtrue-
dc.identifier.hdl11420/1418-
tuhh.abstract.englishThe impact of structural properties of three commercial PACs as well as two mechanically ground PACs on their efficiency in NOM removal and fouling reduction in combined adsorption-ultrafiltration (PAC-UF) of northern German groundwater was investigated. All PACs showed highest adsorption affinity for medium molecular weight NOM fractions. The meso-pore surface area rather than the total surface area (B.E.T.) mainly governed the extent of NOM removal. However, adsorption of macromolecular NOM fractions, which were found to be the main contributor to total and irreversible fouling, was limited by tested commercial carbons, and no significant mitigation of fouling was achieved by any tested PAC concentration. Lowering the particle size by grinding of the PAC, however, enhanced removal of macromolecular NOM fractions considerably, and fouling mitigation occurred at substantially lower PAC concentrations compared to raw carbons. A larger external surface area probably let to more shell adsorption, a more homogeneous particle distribution on the membrane surface and a better mass transport. In addition, comparison of the adsorption isotherms of raw and milled PACs showed that, due to the grinding of PAC particles, additional inner pores structures became available for NOM adsorption. Results of this study point out that structural properties of PAC dramatically influence the efficiency of combined PAC-UF, which needs to be considered during PAC selection and process design.de_DE
tuhh.relation.ispartofWaterde
tuhh.publisher.doi10.3390/w9080580-
tuhh.publication.instituteWasserressourcen und Wasserversorgung B-11de_DE
tuhh.identifier.doi10.15480/882.1415-
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
dc.rights.nationallicensefalsede_DE
item.creatorOrcidSchulz, Martin-
item.creatorOrcidBünting, Sönke-
item.creatorOrcidErnst, Mathias-
item.creatorGNDSchulz, Martin-
item.creatorGNDBünting, Sönke-
item.creatorGNDErnst, Mathias-
item.grantfulltextopen-
item.fulltextWith Fulltext-
crisitem.author.orcid0000-0001-9282-6683-
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