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dc.contributor.authorAguilar-Alarcón, Patricia
dc.contributor.authorGonzalez, Susana V.
dc.contributor.authorSimonsen, Mads
dc.contributor.authorBorrero-Santiago, Ana R.
dc.contributor.authorSanchís, Josep
dc.contributor.authorMeriac, Andre
dc.contributor.authorKolarevic, Jelena
dc.contributor.authorAsimakopoulos, Alexandros G.
dc.contributor.authorMikkelsen, Øyvind
dc.identifier.citationScience of the Total Environment. 2020, 749, .en_US
dc.description.abstractRecirculating aquaculture systems (RAS) are a new alternative to traditional aquaculture approaches, allowing full control over the fish production conditions, while reducing the water demand. The reduction of water exchange leads to an accumulation of dissolved organic matter (DOM) that can have potential effects on water quality, fish welfare and system performance. Despite the growing awareness of DOM in aquaculture, scarce scientific information exists for understanding the composition and transformation of DOM in RAS. In this study, a non-targeted approach using ultra-performance liquid chromatography coupled to a hybrid quadrupole-time of flight mass spectrometer (UPLC-QTOF-MS) was used to characterize compositional changes of low molecular weight (LMW) DOM in RAS, when operated under two different feed types. A total of 1823 chemicals were identified and the majority of those contained a CHON chemical group in their structure. Changes in the composition of LMW-DOM in RAS waters were observed when the standard feed was switched to RAS feed. The DOM with the use of standard feed, consisted mainly of lignin/CRAM-like, CHO and CHOS chemical groups, while the DOM that used RAS feed, was mainly composed by unsaturated hydrocarbon, CHNO and CHNOS chemical groups. The Bray-Curtis dissimilarity cluster demonstrated differences in the composition of DOM from RAS and was associated to the type of feed used. When the RAS feed was used, the Kendrick mass defect plots of –CH2- homologous units in the pump-sump (after the water treatment) showed a high removal capacity for CHNO, CHNOS and halogenated chemicals with high Kendrick mass defect, KMD > 0.7. To our knowledge, this is the first report of LMW-DOM characterization of RAS by high-resolution mass spectrometry (HRMS).en_US
dc.rightsNavngivelse 4.0 Internasjonal*
dc.titleCharacterizing changes of dissolved organic matter composition with the use of distinct feeds in recirculating aquaculture systems via high-resolution mass spectrometryen_US
dc.typePeer revieweden_US
dc.typeJournal articleen_US
dc.source.journalScience of the Total Environmenten_US
dc.relation.projectNorges forskningsråd: 237856en_US
dc.description.localcodeThis is an open access article distributed under the terms of the Creative Commons CC-BY license, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.en_US

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Navngivelse 4.0 Internasjonal
Except where otherwise noted, this item's license is described as Navngivelse 4.0 Internasjonal