Quantification and isotopic characterization of benzene polycarboxylic acids (BPCA)-derived black carbon in deep oceanic sediments : Towards assessing pyrogenic inputs from marine sources
Penalva Arias, Nuria (Universitat Autònoma de Barcelona. Institut de Ciència i Tecnologia Ambientals)
Teruel, Oriol (Universitat Autònoma de Barcelona. Institut de Ciència i Tecnologia Ambientals)
Raja, Maria (University of Nottingham)
Rosell Melé, Antoni (Universitat Autònoma de Barcelona. Institut de Ciència i Tecnologia Ambientals)
Villanueva, Joan (Universitat Autònoma de Barcelona. Institut de Ciència i Tecnologia Ambientals)

Date:	2024
Description:	10 pàg.
Abstract:	Methodologies based on benzene polycarboxylic acids (BPCA) selectively target the polymeric aromatic fraction of black carbon (BC) and are considered adequate to quantify pyrogenic inputs in environmental samples such as soils, lakes, and the marine dissolved organic carbon. However, the usefulness of these methodologies to quantify BPCA-derived BC in deep-sea sediments has not been fully evaluated. In this manuscript we describe and validate a procedure to quantify BPCAs in deep oceanic sediments with very low organic carbon content. The resulting analytical procedure has produced reproducible quantitative data for BPCAs over a period of 10 months (coefficient of variation, CV = 6. 4 − 6. 6 %). The stable carbon isotopes (δ13C) of BC_BPCA have been characterized using an LC Isolink™-irMS system with an accuracy better than 0. 5 ‰. The quantitative and isotopic composition of several marine sediments has been characterized to investigate the relative contributions of marine/diagenetic and continental/pyrogenic sources to the BC accumulated in oceanic sediments from different contexts, ranging from upwelling systems to remote oceanic locations. Overall, a significant fraction of the sedimentary BC is of marine origin and should be considered in inventories of pyrogenic materials accumulated in the world oceans. However, the continental/pyrogenic sources can be largely dominant in marine settings with large inputs of pyrogenic materials.
Grants:	European Commission 834934 Agència de Gestió d'Ajuts Universitaris i de Recerca 2019/FI-B00522 Ministerio de Ciencia e Innovación CEX2019-000940-M
Note:	Unidad de excelencia María de Maeztu CEX2019-000940-M
Note:	Altres ajuts: acords transformatius de la UAB
Rights:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, i la comunicació pública de l'obra, sempre que no sigui amb finalitats comercials, i sempre que es reconegui l'autoria de l'obra original. No es permet la creació d'obres derivades.
Language:	Anglès
Document:	Article ; recerca ; Versió publicada
Subject:	Benzene polycarboxylic acid ; LC-UV ; LC-irMS ; Black carbon ; Isotopes of organic carbon ; δ13C ; Marine sediment ; Pyrogenic carbon ; Total organic carbon ; Diagenetic black carbon ; SDG 14 - Life Below Water
Published in:	Organic geochemistry, Vol. 193 (July 2024) , art. 104811, ISSN 1873-5290

DOI: 10.1016/j.orggeochem.2024.104811

10 p, 3.1 MB

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Research literature > UAB research groups literature > Research Centres and Groups (research output) > Experimental sciences > Institut de Ciència i Tecnologia Ambientals (ICTA)
Articles > Research articles
Articles > Published articles