Advanced characterization of dissolved organic matter released by bloom-forming marine algae

Handle URI:
http://hdl.handle.net/10754/625599
Title:
Advanced characterization of dissolved organic matter released by bloom-forming marine algae
Authors:
Rehman, Zahid Ur ( 0000-0001-6904-6435 ) ; Jeong, Sanghyun; Tabatabai, S. Assiyeh Alizadeh ( 0000-0002-4997-3861 ) ; Emwas, Abdul-Hamid M.; Leiknes, TorOve ( 0000-0003-4046-5622 )
Abstract:
Algal organic matter (AOM), produced by marine phytoplankton during bloom periods, may adversely affect the performance of membrane processes in seawater desalination. The polysaccharide fraction of AOM has been related to (bio)fouling in micro-filtration and ultrafiltration, and reverse osmosis membranes. However, so far, the chemical structure of the polysaccharides released by bloom-forming algae is not well understood. In this study, dissolved fraction of AOM produced by three algal species (Chaetoceros affinis, Nitzschia epithemoides and Hymenomonas spp.) was characterized using liquid chromatography–organic carbon detection (LC-OCD) and fluorescence spectroscopy. Chemical structure of polysaccharides isolated from the AOM solutions at stationary phase was analyzed using proton nuclear magnetic resonance (H-NMR). The results showed that production and composition of dissolved AOM varied depending on algal species and their growth stage. AOM was mainly composed of biopolymers (BP; i.e., polysaccharides and proteins [PN]), but some refractory substances were also present.H-NMR spectra confirmed the predominance of carbohydrates in all samples. Furthermore, similar fingerprints were observed for polysaccharides of two diatom species, which differed considerably from that of coccolithophores. Based on the findings of this study,H-NMR could be used as a method for analyzing chemical profiles of algal polysaccharides to enhance the understanding of their impact on membrane fouling.
KAUST Department:
Biological and Environmental Sciences and Engineering (BESE) Division; Water Desalination and Reuse Research Center (WDRC); Imaging and Characterization Core Lab
Citation:
Rehman ZU, Jeong S, Tabatabai S.A.A. , Emwas A, -H. , Leiknes T (2017) Advanced characterization of dissolved organic matter released by bloom-forming marine algae. DESALINATION AND WATER TREATMENT 69: 1–11. Available: http://dx.doi.org/10.5004/dwt.2017.0444.
Publisher:
Informa UK Limited
Journal:
DESALINATION AND WATER TREATMENT
Issue Date:
1-Jun-2017
DOI:
10.5004/dwt.2017.0444
Type:
Article
Sponsors:
This study was supported by funding from King Abdullah University of Science and Technology (KAUST).
Additional Links:
http://www.deswater.com/DWT_articles/vol_69_papers/69_2017_1.pdf
Appears in Collections:
Articles; Advanced Nanofabrication, Imaging and Characterization Core Lab; Water Desalination and Reuse Research Center (WDRC); Biological and Environmental Sciences and Engineering (BESE) Division

Full metadata record

DC FieldValue Language
dc.contributor.authorRehman, Zahid Uren
dc.contributor.authorJeong, Sanghyunen
dc.contributor.authorTabatabai, S. Assiyeh Alizadehen
dc.contributor.authorEmwas, Abdul-Hamid M.en
dc.contributor.authorLeiknes, TorOveen
dc.date.accessioned2017-10-03T12:49:28Z-
dc.date.available2017-10-03T12:49:28Z-
dc.date.issued2017-06-01en
dc.identifier.citationRehman ZU, Jeong S, Tabatabai S.A.A. , Emwas A, -H. , Leiknes T (2017) Advanced characterization of dissolved organic matter released by bloom-forming marine algae. DESALINATION AND WATER TREATMENT 69: 1–11. Available: http://dx.doi.org/10.5004/dwt.2017.0444.en
dc.identifier.doi10.5004/dwt.2017.0444en
dc.identifier.urihttp://hdl.handle.net/10754/625599-
dc.description.abstractAlgal organic matter (AOM), produced by marine phytoplankton during bloom periods, may adversely affect the performance of membrane processes in seawater desalination. The polysaccharide fraction of AOM has been related to (bio)fouling in micro-filtration and ultrafiltration, and reverse osmosis membranes. However, so far, the chemical structure of the polysaccharides released by bloom-forming algae is not well understood. In this study, dissolved fraction of AOM produced by three algal species (Chaetoceros affinis, Nitzschia epithemoides and Hymenomonas spp.) was characterized using liquid chromatography–organic carbon detection (LC-OCD) and fluorescence spectroscopy. Chemical structure of polysaccharides isolated from the AOM solutions at stationary phase was analyzed using proton nuclear magnetic resonance (H-NMR). The results showed that production and composition of dissolved AOM varied depending on algal species and their growth stage. AOM was mainly composed of biopolymers (BP; i.e., polysaccharides and proteins [PN]), but some refractory substances were also present.H-NMR spectra confirmed the predominance of carbohydrates in all samples. Furthermore, similar fingerprints were observed for polysaccharides of two diatom species, which differed considerably from that of coccolithophores. Based on the findings of this study,H-NMR could be used as a method for analyzing chemical profiles of algal polysaccharides to enhance the understanding of their impact on membrane fouling.en
dc.description.sponsorshipThis study was supported by funding from King Abdullah University of Science and Technology (KAUST).en
dc.publisherInforma UK Limiteden
dc.relation.urlhttp://www.deswater.com/DWT_articles/vol_69_papers/69_2017_1.pdfen
dc.subjectAlgal organic matteren
dc.subjectMarine algaeen
dc.subjectMembrane foulingen
dc.subjectNuclear magnetic resonanceen
dc.subjectPolysaccharidesen
dc.titleAdvanced characterization of dissolved organic matter released by bloom-forming marine algaeen
dc.typeArticleen
dc.contributor.departmentBiological and Environmental Sciences and Engineering (BESE) Divisionen
dc.contributor.departmentWater Desalination and Reuse Research Center (WDRC)en
dc.contributor.departmentImaging and Characterization Core Laben
dc.identifier.journalDESALINATION AND WATER TREATMENTen
kaust.authorRehman, Zahid Uren
kaust.authorJeong, Sanghyunen
kaust.authorTabatabai, S. Assiyeh Alizadehen
kaust.authorEmwas, Abdul-Hamid M.en
kaust.authorLeiknes, TorOveen
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