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dc.contributor.authorGao, Jie
dc.contributor.authorSun, Shi-Peng
dc.contributor.authorZhu, Wen-Ping
dc.contributor.authorChung, Neal Tai-Shung
dc.date.accessioned2015-11-01T11:15:19Z
dc.date.available2015-11-01T11:15:19Z
dc.date.issued2015-10-26
dc.identifier.citationGreen Modification of Outer Selective P84 Nanofiltration (NF) Hollow Fiber Membranes for Cadmium Removal 2015 Journal of Membrane Science
dc.identifier.issn03767388
dc.identifier.doi10.1016/j.memsci.2015.10.051
dc.identifier.urihttp://hdl.handle.net/10754/581503
dc.description.abstractOuter-selective thin-film composite (TFC) hollow fiber membranes are normally made from interfacial polymerization of m-phenylenediamine (MPD) and trimesoyl chloride (TMC). However, the removal of excess MPD solution and the large consumption of alkane solvents are their technical bottlenecks. In this study, green methods to prepare the outer selective TFC hollow fiber membranes were explored by firstly modifying the membrane substrate with polyethyleneimine (PEI) and then by water soluble small molecules such as glutaraldehyde (GA) and epichlorohydrin (ECH). Using P84 polyimide as the substrate, not only do these modifications decrease substrate's pore size, but also vary surface charge by making the membranes less positively charged. As a result, the resultant membranes have higher rejections against salts such as Na2SO4, NaCl and MgSO4. The PEI and then GA modified membrane has the best separation performance with a NaCl rejection over 90% and a pure water permeability (PWP) of 1.74±0.01 Lm−2bar−1h−1. It also shows an impressive rejection to CdCl2 (94%) during long-term stability tests. The CdCl2 rejection remains higher than 90% at operating temperatures from 5 to 60 °C. This study may provide useful insights for green manufacturing of outer-selective nanofiltration (NF) hollow fiber membranes.
dc.language.isoen
dc.publisherElsevier BV
dc.relation.urlhttp://linkinghub.elsevier.com/retrieve/pii/S0376738815302817
dc.rightsNOTICE: this is the author’s version of a work that was accepted for publication in Journal of Membrane Science. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Journal of Membrane Science, 26 October 2015. DOI: 10.1016/j.memsci.2015.10.051
dc.subjectNanofiltration (NF)
dc.subjectCadmium
dc.subjectP84 polyimide
dc.subjectThin film composite (TFC)
dc.subjectHollow fiber membrane
dc.titleGreen Modification of Outer Selective P84 Nanofiltration (NF) Hollow Fiber Membranes for Cadmium Removal
dc.typeArticle
dc.contributor.departmentWater Desalination and Reuse Research Center (WDRC)
dc.identifier.journalJournal of Membrane Science
dc.eprint.versionPost-print
dc.contributor.institutionDepartment of Chemical & Biomolecular Engineering, National University of Singapore, Singapore 117585
dc.contributor.institutionNational Engineering Research Center for Special Separation Membrane, School of Chemical Engineering, Nanjing Tech University, Nanjing, China 210009
dc.contributor.affiliationKing Abdullah University of Science and Technology (KAUST)
kaust.personChung, Neal Tai-Shung
refterms.dateFOA2017-10-26T00:00:00Z


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