Sources and distribution of organic matter and polycyclic aromatic hydrocarbons in sediments of the southwestern Portuguese shelf
Total organic carbon (Corg), total nitrogen (Ntot), Corg/Ntot, δ13Corg, δ15N, calcium carbonate (CaCO3), and grain size were analyzed in 70 surface samples and 19 short cores from the southwestern Portuguese shelf. Perylene and USEPA-16 PAHs were quantified in a subset of these samples. The findings...
| Autores: | , , , , , , , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2024 |
| País: | España |
| Institución: | Consejo Superior de Investigaciones Científicas (CSIC) |
| Repositorio: | DIGITAL.CSIC. Repositorio Institucional del CSIC |
| OAI Identifier: | oai:digital.csic.es:10261/373410 |
| Acceso en línea: | http://hdl.handle.net/10261/373410 https://api.elsevier.com/content/abstract/scopus_id/85209942568 |
| Access Level: | acceso abierto |
| Palabra clave: | USEPA-16ΣPAHs Marine sediments Organic matter composition Perylene Stable carbon and nitrogen isotopes http://metadata.un.org/sdg/6 http://metadata.un.org/sdg/14 http://metadata.un.org/sdg/11 Ensure availability and sustainable management of water and sanitation for all Make cities and human settlements inclusive, safe, resilient and sustainable Ensure sustainable consumption and production patterns Conserve and sustainably use the oceans, seas and marine resources for sustainable development |
| Sumario: | Total organic carbon (Corg), total nitrogen (Ntot), Corg/Ntot, δ13Corg, δ15N, calcium carbonate (CaCO3), and grain size were analyzed in 70 surface samples and 19 short cores from the southwestern Portuguese shelf. Perylene and USEPA-16 PAHs were quantified in a subset of these samples. The findings suggest that organic matter derives from a mix of terrestrial and marine sources, outlined by Corg, Ntot, and isotopic signatures. Perylene combined with δ13Corg was used to identify the main PAH sources in these environments. Diagnostic perylene ratios revealed contributions from natural sources in the Tagus region and contaminated materials from the Sado Dredged Disposal Site, with additional perylene in Sines linked to atmospheric deposition of pyrogenic sources. A significant correlation between perylene and USEPA-16 PAHs indicates natural and anthropogenic inputs from the Tagus. This multiproxy approach-combining USEPA-16ΣPAHs, perylene, and δ13Corg-offers insights for assessing environmental risks and guiding marine environmental management according to the MSFD. |
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