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dc.contributor.authorGutierrez, Leonardo
dc.contributor.authorKeucken, Alexander
dc.contributor.authorAubry, Cyril
dc.contributor.authorZaouri, Noor A.
dc.contributor.authorTeychene, Benoit
dc.contributor.authorCroue, Jean-Philippe
dc.date.accessioned2018-04-16T11:27:43Z
dc.date.available2018-04-16T11:27:43Z
dc.date.issued2018-04-06
dc.identifier.citationGutierrez L, Keucken A, Aubry C, Zaouri N, Teychene B, et al. (2018) Impact of operation conditions, foulant adsorption, and chemical cleaning on the nanomechanical properties of ultrafiltration hollow fiber membranes. Colloids and Surfaces A: Physicochemical and Engineering Aspects 549: 34–42. Available: http://dx.doi.org/10.1016/j.colsurfa.2018.04.003.
dc.identifier.issn0927-7757
dc.identifier.doi10.1016/j.colsurfa.2018.04.003
dc.identifier.urihttp://hdl.handle.net/10754/627515
dc.description.abstractThis study analyzed the change in nanomechanical properties of ultrafiltration hollow fiber membranes harvested from pilot-scale units after twelve months of operation. Quantitative Nanomechanical Mapping technique was used to distinguish between adhesion, dissipation, deformation, and modulus while simultaneously generating a topographic image of membranes. Nanomechanical maps of virgin membranes evidenced surfaces of heterogeneous properties and were described by probability density functions. Operating conditions and feed quality exerted an impact on membranes. Clean harvested membranes showed a higher mean modulus and dissipation, and a lower deformation than virgin membranes, indicating stiffer membranes of lower elastic deformation. A significant fraction of these measurements displayed peak values deviating from the distribution; which represents regions of the membrane with properties highly differing from the probability density function. The membrane polymeric material experienced severe physicochemical changes by foulant adsorption and reaction with cleaning agents. Foulant adsorption on membranes was heterogeneous in both morphology and mechanical properties and could not be statistically described. Foulants, i.e., mainly consisting of polysaccharides and proteinaceous structures, displayed low elastic deformation and high roughness and adhesion. The presence of foulants after chemical cleaning and their high adhesion would be a direct nanoscale evidence of irreversible fouling. By the end of the operation, the Trans-Membrane Pressure experienced a 40% increase. The cleaning process was not able to fully recover the initial TMP, indicating irreversible fouling, i.e., permanent change in membrane characteristics and decrease in performance. These results suggest a link between the macroscopic properties and nanomechanical characteristics of membranes. This study advances our nanoscale understanding of the impact of fouling and operating conditions on membranes characteristics.
dc.description.sponsorshipThe financial support of the GenoMembran-project funded by The Swedish Water and Wastewater Association (Swedish Water Development, SVU), Norrvatten, and VIVAB is gratefully acknowledged. Pentair X-Flow is acknowledged for the provision of various test modules and general membrane investigations.
dc.publisherElsevier BV
dc.relation.urlhttp://www.sciencedirect.com/science/article/pii/S0927775718302735
dc.rightsNOTICE: this is the author’s version of a work that was accepted for publication in Colloids and Surfaces A: Physicochemical and Engineering Aspects. 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 Colloids and Surfaces A: Physicochemical and Engineering Aspects, [, , (2018-04-06)] DOI: 10.1016/j.colsurfa.2018.04.003 . © 2018. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
dc.subjectAtomic Force Microscopy
dc.subjectfouling
dc.subjectultrafiltration hollow fiber membrane
dc.subjectnanomechanical properties
dc.subjectQNM
dc.titleImpact of operation conditions, foulant adsorption, and chemical cleaning on the nanomechanical properties of ultrafiltraion hollow fiber membranes
dc.typeArticle
dc.contributor.departmentBiological and Environmental Sciences and Engineering (BESE) Division
dc.contributor.departmentEnvironmental Science and Engineering Program
dc.contributor.departmentWater Desalination and Reuse Research Center (WDRC)
dc.identifier.journalColloids and Surfaces A: Physicochemical and Engineering Aspects
dc.eprint.versionPost-print
dc.contributor.institutionCurtin Water Quality Research Centre, Department of Chemistry, Curtin University, Australia
dc.contributor.institutionParticle and Interfacial Technology Group (PaInT), Department of Applied Analytical and Physical Chemistry, Faculty of Bioscience Engineering, University of Ghent, Belgium
dc.contributor.institutionWater Resources Engineering, Faculty of Engineering, Lund technical University, Lund, Sweden
dc.contributor.institutionVatten & Miljö i Väst AB (VIVAB), Falkenberg, Sweden
dc.contributor.institutionMasdar Institute of Science and Technology, Masdar City, Abu Dhabi, United Arab Emirates
dc.contributor.institutionInstitut de Chimie des Milieux et Matériaux de Poitiers, Universite de Poitiers, France
kaust.personZaouri, Noor A
dc.date.published-online2018-04-06
dc.date.published-print2018-07


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