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J. Mar. Sci. Eng. 2016, 4(3), 50; doi:10.3390/jmse4030050

Metal Ions and Hydroperoxide Content: Main Drivers of Coastal Lipid Autoxidation in Riverine Suspended Particulate Matter and Higher Plant Debris

1
Aix Marseille Université, Université de Toulon, CNRS, IRD, MIO UM 110, Mediterranean Institute of Oceanography, 13288 Marseille, France
2
CEREGE UM34, Aix Marseille Université, CNRS, IRD, CDF, 13545 Aix-en-provence, France
3
Centre de Formation et de Recherche sur l’Environnement Méditerranéen (CEFREM, UMR CNRS 5110), Bât. U, Université de Perpignan, Via Domitia (UPVD), 66860 Perpignan, France
*
Author to whom correspondence should be addressed.
Academic Editor: Boris Peter Koch
Received: 30 May 2016 / Revised: 18 July 2016 / Accepted: 9 August 2016 / Published: 23 August 2016
(This article belongs to the Section Chemical Oceanography)
View Full-Text   |   Download PDF [1146 KB, uploaded 23 August 2016]   |  

Abstract

Autoxidation is a complex abiotic degradation process, and while it has long been known and well studied in biological compounds, it has been widely overlooked in environmental samples and as a part of environmental processes. With recent observations showing the magnitude of the involvement of autoxidation in coastal environments, it has become critical to better understand how and why this degradative process takes place. At the riverine/marine interface, recent findings evidenced a spike in autoxidation rates upon the arrival of suspended particulate matter in seawater. In this study, we aimed at identifying autoxidation-favoring factors in vitro by analyzing suspended particulate matter incubated under different conditions. If metal ions have long been known to induce autoxidation in biological systems, we show that they indeed induce autoxidation in particulate matter incubated in water, but also that the content in photochemically-produced hydroperoxides in suspended particulate matter is crucial to the induction of its autoxidation in water. View Full-Text
Keywords: autoxidation; photo-oxidation; lipid tracers; organic matter degradation; suspended particulate matter; hydroperoxide autoxidation; photo-oxidation; lipid tracers; organic matter degradation; suspended particulate matter; hydroperoxide
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Galeron, M.-A.; Radakovitch, O.; Charrière, B.; Rontani, J.-F. Metal Ions and Hydroperoxide Content: Main Drivers of Coastal Lipid Autoxidation in Riverine Suspended Particulate Matter and Higher Plant Debris. J. Mar. Sci. Eng. 2016, 4, 50.

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