210 Pb geochronology and metal concentrations in sediment cores recovered in the Alvarado Lagoon system, Veracruz, Mexico.

Autor: Velandia-Aquino LB; Universidad Nacional Autónoma de México, Posgrado en Ciencias de la Tierra, Instituto de Geología. Av. Universidad N° 3000, UNAM CU, Coyoacán, 04510, Cd. de México, Mexico. Electronic address: laura_velandia@yahoo.com.mx., Botello AV; Universidad Nacional Autónoma de México, Instituto de Ciencias del Mar y Limnología, Laboratorio de Contaminación Marina. Circuito exterior s/n, CU Coyoacán 04510, Cd. de México, Mexico. Electronic address: laura.velandia@comunidad.unam.mx., Ponce-Vélez G; Universidad Nacional Autónoma de México, Instituto de Ciencias del Mar y Limnología, Laboratorio de Contaminación Marina. Circuito exterior s/n, CU Coyoacán 04510, Cd. de México, Mexico. Electronic address: ponce@cmarl.unam.mx., Armstrong-Altrin JS; Universidad Nacional Autónoma de México, Instituto de Ciencias del Mar y Limnología, Unidad de Procesos Oceánicos y Costeros, Circuito Exterior s/n, CU Coyoacán, 04510, Cd. de México, Mexico. Electronic address: armstrong@cmarl.unam.mx., Ruiz-Fernández AC; Universidad Nacional Autónoma de México, Instituto de Ciencias del Mar y Limnología, Laboratorio de Geoquímica Isotópica y Geocronología. Joel Monte Camarena s/n, Col. Playa Sur, 82040, Mazatlán, Sinaloa, Mexico. Electronic address: caro@ola.icmyl.unam.mx., Prado B; Universidad Nacional Autónoma de México, Instituto de Geología, Departamento de Ciencias Ambientales y del Suelo. Av. Universidad N° 3000, UNAM CU, Coyoacán, 04510, Cd. de México, Mexico. Electronic address: bprado@geologia.unam.mx., Villanueva-Fragoso S; Universidad Nacional Autónoma de México, Instituto de Ciencias del Mar y Limnología, Laboratorio de Contaminación Marina. Circuito exterior s/n, CU Coyoacán 04510, Cd. de México, Mexico. Electronic address: suvilla11@gmail.com.
Jazyk: angličtina
Zdroj: Chemosphere [Chemosphere] 2023 Jul; Vol. 330, pp. 138709. Date of Electronic Publication: 2023 Apr 16.
DOI: 10.1016/j.chemosphere.2023.138709
Abstrakt: Three sediment cores recovered from the Alvarado Lagoon System (ALS) in the Gulf of Mexico were used to reconstruct the history of metals and metalloids and their environmental importance. The sedimentary profiles were dated with 210 Pb and verified with 137 Cs. Maximum ages of 77 and 86 years were estimated. Sediment provenance was described by sedimentological and geochemical proxies. The chemical alteration index (CIA) and weathering index (CIW) revealed moderate to high intensity of weathering in the source area that is controlled tropical climatic conditions, runoff, and precipitation in the basin that feeds sediments to this coastal lagoon. The Al 2 O 3 /TiO 2 ratios indicated that the sediments were derived from intermediate igneous rocks. The enrichment factor values revealed the lithogenic and anthropic contribution of metals and metalloids. Cd is classified under the category extremely severe enrichment; agricultural activities, fertilizers, herbicides, and pesticides containing Cd are expected to supply this metal to the ecosystem. Factor Analysis and Principal Components provided two main factors, terrigenous and biological origins; ANOVA indicated that there are significant differences between the cores for the parameters analyzed and revealed that there are differences in depositional environments between the recovery zones of the cores. The ALS presented natural variations associated with the climatic conditions, terrigenous input, and its relationship with the hydrological variations of the main rivers. The contribution of this work was to identify the magnitude of the natural component versus the human contribution, mainly of risk metals such as Cd, to support better management of the hydrological basin that affects the ALS.
Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2023 Elsevier Ltd. All rights reserved.)
Databáze: MEDLINE
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