Interfacial interactions between Skeletonema costatum extracellular organic matter and metal oxides: Implications for ceramic membrane filtration

Handle URI:
http://hdl.handle.net/10754/623855
Title:
Interfacial interactions between Skeletonema costatum extracellular organic matter and metal oxides: Implications for ceramic membrane filtration
Authors:
Zaouri, Noor A ( 0000-0003-2759-2934 ) ; Gutierrez, Leonardo; Dramas, Laure ( 0000-0002-8883-2084 ) ; Garces, Daniel; Croue, Jean-Philippe
Abstract:
In the current study, the interfacial interactions between the high molecular weight (HMW) compounds of Skeletonema costatum (SKC) extracellular organic matter (EOM) and ZrO2 or Al2O3, were investigated by atomic force microscopy (AFM). HMW SKC-EOM was rigorously characterized and described as a hydrophilic organic compound mainly comprised of polysaccharide-like structures. Lipids and proteins were also observed, although in lower abundance. HMW SKC-EOM displayed attractive forces during approaching (i.e., leading to jump-to-contact events) and adhesion forces during retracting regime to both metal oxides at all solution conditions tested, where electrostatics and hydrogen bonding were suggested as dominant interacting mechanisms. However, the magnitude of these forces was significantly higher on ZrO2 surfaces, irrespective of cation type (Na+ or Ca2+) or concentration. Interestingly, while HMW SKC-EOM interacting forces to Al2O3 were practically insensitive to solution chemistry, the interactions between ZrO2 and HMW SKC-EOM increased with increasing cation concentration in solution. The structure, and lower charge, hydrophilicity, and density of hydroxyl groups on ZrO2 surface would play a key role on favoring zirconia associations with HMW SKC-EOM. The current results contribute to advance our fundamental understanding of Algogenic Organic Matter (AOM) interfacial interactions with metal oxides (i.e., AOM membrane fouling), and would highly assist in the proper selection of membrane material during episodic algal blooms.
KAUST Department:
Water Desalination and Reuse Research Center (WDRC)
Citation:
Zaouri N, Gutierrez L, Dramas L, Garces D, Croue J-P (2017) Interfacial interactions between Skeletonema costatum extracellular organic matter and metal oxides: Implications for ceramic membrane filtration. Water Research 116: 194–202. Available: http://dx.doi.org/10.1016/j.watres.2017.03.034.
Publisher:
Elsevier BV
Journal:
Water Research
Issue Date:
21-Mar-2017
DOI:
10.1016/j.watres.2017.03.034
Type:
Article
ISSN:
0043-1354
Sponsors:
The authors are grateful to the funding from King Abdullah University of Science and Technology (KAUST).
Additional Links:
http://www.sciencedirect.com/science/article/pii/S0043135417302117
Appears in Collections:
Articles; Water Desalination and Reuse Research Center (WDRC)

Full metadata record

DC FieldValue Language
dc.contributor.authorZaouri, Noor Aen
dc.contributor.authorGutierrez, Leonardoen
dc.contributor.authorDramas, Laureen
dc.contributor.authorGarces, Danielen
dc.contributor.authorCroue, Jean-Philippeen
dc.date.accessioned2017-05-31T11:23:09Z-
dc.date.available2017-05-31T11:23:09Z-
dc.date.issued2017-03-21en
dc.identifier.citationZaouri N, Gutierrez L, Dramas L, Garces D, Croue J-P (2017) Interfacial interactions between Skeletonema costatum extracellular organic matter and metal oxides: Implications for ceramic membrane filtration. Water Research 116: 194–202. Available: http://dx.doi.org/10.1016/j.watres.2017.03.034.en
dc.identifier.issn0043-1354en
dc.identifier.doi10.1016/j.watres.2017.03.034en
dc.identifier.urihttp://hdl.handle.net/10754/623855-
dc.description.abstractIn the current study, the interfacial interactions between the high molecular weight (HMW) compounds of Skeletonema costatum (SKC) extracellular organic matter (EOM) and ZrO2 or Al2O3, were investigated by atomic force microscopy (AFM). HMW SKC-EOM was rigorously characterized and described as a hydrophilic organic compound mainly comprised of polysaccharide-like structures. Lipids and proteins were also observed, although in lower abundance. HMW SKC-EOM displayed attractive forces during approaching (i.e., leading to jump-to-contact events) and adhesion forces during retracting regime to both metal oxides at all solution conditions tested, where electrostatics and hydrogen bonding were suggested as dominant interacting mechanisms. However, the magnitude of these forces was significantly higher on ZrO2 surfaces, irrespective of cation type (Na+ or Ca2+) or concentration. Interestingly, while HMW SKC-EOM interacting forces to Al2O3 were practically insensitive to solution chemistry, the interactions between ZrO2 and HMW SKC-EOM increased with increasing cation concentration in solution. The structure, and lower charge, hydrophilicity, and density of hydroxyl groups on ZrO2 surface would play a key role on favoring zirconia associations with HMW SKC-EOM. The current results contribute to advance our fundamental understanding of Algogenic Organic Matter (AOM) interfacial interactions with metal oxides (i.e., AOM membrane fouling), and would highly assist in the proper selection of membrane material during episodic algal blooms.en
dc.description.sponsorshipThe authors are grateful to the funding from King Abdullah University of Science and Technology (KAUST).en
dc.publisherElsevier BVen
dc.relation.urlhttp://www.sciencedirect.com/science/article/pii/S0043135417302117en
dc.subjectAtomic force microscopyen
dc.subjectInterfacial interactionsen
dc.subjectMetal oxidesen
dc.subjectSkeletonema costatum extracellular organic matteren
dc.titleInterfacial interactions between Skeletonema costatum extracellular organic matter and metal oxides: Implications for ceramic membrane filtrationen
dc.typeArticleen
dc.contributor.departmentWater Desalination and Reuse Research Center (WDRC)en
dc.identifier.journalWater Researchen
dc.contributor.institutionCurtin Water Quality Research Centre, Department of Chemistry, Curtin University, Australiaen
dc.contributor.institutionFacultad del Mar y Medio Ambiente, Universidad Del Pacifico, Guayaquil, Ecuadoren
dc.contributor.institutionEscuela Superior Politécnica del Litoral, Facultad de Ingeniería en Ciencias de la Tierra, Ecuadoren
kaust.authorZaouri, Noor Aen
kaust.authorDramas, Laureen
kaust.authorCroue, Jean-Philippeen
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