Publication:
Impact of natural organic matter on floc size and structure effects in membrane filtration

dc.contributor.author Lee, Sang en_US
dc.contributor.author Fane, Anthony en_US
dc.contributor.author Waite, David en_US
dc.date.accessioned 2021-11-25T14:16:17Z
dc.date.available 2021-11-25T14:16:17Z
dc.date.issued 2005 en_US
dc.description.abstract Hematite (10 mg of Fe/L) floc-humic acid assemblages have been formed at pH 4 either by first aggregating hematite particles with salt (100 mM KCI) and then adding humic acid (salt-particle-organic or SPO assemblages) or by suspending the hematite particles in humic acid solutions and then adding salt to induce aggregation (organic-particle-salt or OPS assemblages). The behavior of these assemblages upon deposition on microfiltration (MF) membranes has then been investigated. In the OPS case, the fractal dimension (dF) of the assemblages formed varied dramatically depending upon the extent of charge neutralization by added fulvic acid with dF values typical of diffusion-limited cluster aggregates at low (0.1-0.2 mg/L) humic acid concentrations and dF values typical of reaction-limited cluster aggregates either in the absence of humic acid or concentrations greater than 0.4-0.6 mg/L. In the SPO case, dF values on the order of 2.1 were initially observed and were found to decrease to around 1.8-1.9 for humic acid concentrations greater than 0.6-0.8 mg/L. OPS assemblages with low fractal dimensions were found to be highly compressible once deposited on MF membranes with significantly higher specific cake resistances than was the case for SPO assemblages at transmembrane pressures of 50 kPa and above. These results highlight the importance of both the choice of coagulant (e.g., preformed vs formed in situ) and the transmembrane pressure to which a membrane filtration process might be allowed to rise prior to removal of the fouling layer. en_US
dc.identifier.uri http://hdl.handle.net/1959.4/42317
dc.language English
dc.language.iso EN en_US
dc.rights CC BY-NC-ND 3.0 en_US
dc.rights.uri https://creativecommons.org/licenses/by-nc-nd/3.0/au/ en_US
dc.source Legacy MARC en_US
dc.title Impact of natural organic matter on floc size and structure effects in membrane filtration en_US
dc.type Journal Article en
dcterms.accessRights metadata only access
dspace.entity.type Publication en_US
unsw.accessRights.uri http://purl.org/coar/access_right/c_14cb
unsw.relation.faculty Engineering
unsw.relation.ispartofissue 17 en_US
unsw.relation.ispartofjournal Environmental Science & Technology en_US
unsw.relation.ispartofpagefrompageto 6477-6486 en_US
unsw.relation.ispartofvolume 39 en_US
unsw.relation.originalPublicationAffiliation Lee, Sang, Chemical Sciences & Engineering, Faculty of Engineering, UNSW en_US
unsw.relation.originalPublicationAffiliation Fane, Anthony, Chemical Sciences & Engineering, Faculty of Engineering, UNSW en_US
unsw.relation.originalPublicationAffiliation Waite, David, Civil & Environmental Engineering, Faculty of Engineering, UNSW en_US
unsw.relation.school School of Chemical Engineering *
unsw.relation.school School of Civil and Environmental Engineering *
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