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Electrochemical characterization of mangrove sediments: A proposal of new proxies for organic matter oxidation

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dc.contributor.author Cebrián-Torrejón, G.
dc.contributor.author Perez Segovia, Alexander
dc.contributor.author Montoya, N.
dc.contributor.author Piquero-Cilla, J.
dc.contributor.author Saldarriaga, M.S.
dc.contributor.author Gutierrez Aguilar, Dimitri Alexey
dc.contributor.author Sanders, C.J.
dc.contributor.author Machado, W.
dc.contributor.author Doménech-Carbó, A.
dc.date.accessioned 2019-07-04T16:59:32Z
dc.date.available 2019-07-04T16:59:32Z
dc.date.issued 2019
dc.identifier.uri https://hdl.handle.net/20.500.12866/6783
dc.description.abstract The voltammetric response of microparticulate deposits resulting from solvent evaporation of ethanolic extracts of mangrove sediments in contact with aqueous acetate buffer is hereby described. Dated sediment cores sampled from the Peruvian mangrove system (“Manglares de Tumbes” National Sanctuary) presented voltammetric responses dominated by oxidative signals of organic components that exhibit significant variations depending on the depth. Voltammetric data allowed for the definition of electrochemical indexes representative of the electrochemically oxidable organic matter fraction. These electrochemical indexes were fEAOM (for the total amount of organic matter being electrochemically active), fEROM (for the fraction of organic matter electrochemically oxidizable in reversible form), fRDOX (for the proportion between the fractions of electrochemically active organic matter which is in an oxidized state and in a reduced state) and fROS (capability for reaction with reactive oxygen species), while the spectroscopic index A1650/A3400 (as a proxy analogous to fRDOX) was also applied. The mangrove forest presents a higher oxidized fraction of the electrochemically active organic matter, as confirmed by additional data obtained from infrared spectroscopy. These results indicate that the described electrochemical indexes may provide insights on organic matter degradation by oxidative processes in addition to chemical analyses of coastal vegetated systems that are currently used, such as mangrove wetlands. en_US
dc.language.iso eng
dc.publisher Elsevier
dc.relation.ispartofseries Applied Geochemistry
dc.rights info:eu-repo/semantics/restrictedAccess
dc.rights.uri https://creativecommons.org/licenses/by-nc-nd/4.0/deed.es
dc.subject Peru en_US
dc.subject sediment core en_US
dc.subject particulate matter en_US
dc.subject Biogeochemistry en_US
dc.subject mangrove en_US
dc.subject organic matter en_US
dc.subject solvent en_US
dc.subject redox conditions en_US
dc.subject Sediments en_US
dc.subject Chemical analysis en_US
dc.subject Biological materials en_US
dc.subject Organic matter en_US
dc.subject oxidation en_US
dc.subject Mangrove sediments en_US
dc.subject Organic compounds en_US
dc.subject acetate en_US
dc.subject aqueous solution en_US
dc.subject coastal sediment en_US
dc.subject Electrochemical characterizations en_US
dc.subject electrochemistry en_US
dc.subject Electrochemistry en_US
dc.subject ethanol en_US
dc.subject evaporation en_US
dc.subject Infrared spectroscopy en_US
dc.subject Organic matter degradations en_US
dc.subject Organic matter fraction en_US
dc.subject Organic matter oxidation en_US
dc.subject Oxidation en_US
dc.subject Oxidation proxies en_US
dc.subject Reactive oxygen species en_US
dc.subject Redox state en_US
dc.subject Voltammetric response en_US
dc.subject Voltammetry en_US
dc.title Electrochemical characterization of mangrove sediments: A proposal of new proxies for organic matter oxidation en_US
dc.type info:eu-repo/semantics/article
dc.identifier.doi https://doi.org/10.1016/j.apgeochem.2018.12.018
dc.subject.ocde https://purl.org/pe-repo/ocde/ford#1.05.00
dc.relation.issn 1872-9134


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