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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. es_PE
dc.contributor.author Pérez A. es_PE
dc.contributor.author Montoya N. es_PE
dc.contributor.author Piquero-Cilla J. es_PE
dc.contributor.author Saldarriaga M.S. es_PE
dc.contributor.author Gutiérrez D. es_PE
dc.contributor.author Sanders C.J. es_PE
dc.contributor.author Machado W. es_PE
dc.contributor.author Doménech-Carbó A. es_PE
dc.date.accessioned 2024-05-30T23:13:38Z
dc.date.available 2024-05-30T23:13:38Z
dc.date.issued 2019
dc.description AP is supported by the “ Fondo Nacional de Desarrollo Científico, Tecnológico y de Innovación Tecnológica ” (Fondecyt - Peru), through the MAGNET research program. The collection of sampling was carried out within the framework of the “Impacto de la Variabilidad y Cambio Climático en el Ecosistema de Manglares de Tumbes” project. Supported by the International Development Research Centre of Canada under management of the Instituto Geofísico del Perú (IGP). WM is supported by research grants from the Brazilian Research Council (CNPq) . CJS is supported by the Australian Research Council ( DE160100443 , DP150103286 and LE140100083 ), in cooperation with Universidade Federal Fluminense . Project CTQ2011-28079-CO3-02 which is also supported with ERDF . We would like to thank Kelly Ronchi for the language revision.
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. © 2018
dc.description.sponsorship Consejo Nacional de Ciencia, Tecnología e Innovación Tecnológica - Concytec
dc.identifier.doi https://doi.org/10.1016/j.apgeochem.2018.12.018
dc.identifier.scopus 2-s2.0-85059185967
dc.identifier.uri https://hdl.handle.net/20.500.12390/2303
dc.language.iso eng
dc.publisher Elsevier Ltd
dc.relation.ispartof Applied Geochemistry
dc.rights info:eu-repo/semantics/openAccess
dc.subject Redox state
dc.subject Electrochemistry es_PE
dc.subject Mangrove sediments es_PE
dc.subject Organic matter es_PE
dc.subject Oxidation proxies es_PE
dc.subject.ocde http://purl.org/pe-repo/ocde/ford#1.04.05
dc.title Electrochemical characterization of mangrove sediments: A proposal of new proxies for organic matter oxidation
dc.type info:eu-repo/semantics/article
dspace.entity.type Publication
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