HAL will be down for maintenance from Friday, June 10 at 4pm through Monday, June 13 at 9am. More information
Skip to Main content Skip to Navigation
Journal articles

Bioaccumulation of potentially toxic elements in Ammonia tepida (foraminifera) from a polluted coastal area

Abstract : This work documents the presence of potentially toxic elements (PTEs) in the sediment and in tests of Ammonia tepida, one of the most common benthic foraminifera species in coastal environments worldwide. It aims to analyze if the presence of PTEs in the carbonate test of this species is related to metals concentration in the sediment aiming its application in paleoenvironmental studies. Three chambers of fifty A. tepida specimens from contaminated and uncontaminated sediments from the Sepetiba Bay, one of the most polluted coastal systems from the SE Brazil, were analyzed using an Environmental Scanning Electron Microscope coupled with an X-ray Dispersive Energy Spectrometer. The results reveal the presence of lithogenic elements and PTEs in the tests of A. tepida. Relatively high values of Pb, Hg and Sn were found in specimens recovered from both polluted and unpolluted sediment layers. The bioaccumulation index revealed higher enrichment of Cd and Cr in tests from sediments moderately to heavily polluted by Cd and to a lesser extent by Cr. The results suggest that the incorporation of metals might be controlled and affected by several factors, such as the water residence time, availability of the metals, and biogeochemical processes. As a result, applications of this method utilizing A. tepida for paleoenvironmental studies do not appear to be feasible without further research.
Document type :
Journal articles
Complete list of metadata

https://hal-insu.archives-ouvertes.fr/insu-03664869
Contributor : Nathalie Pothier Connect in order to contact the contributor
Submitted on : Wednesday, May 11, 2022 - 1:09:30 PM
Last modification on : Friday, May 13, 2022 - 11:15:43 AM

Identifiers

Collections

Citation

Wellen F. L. Castelo, Maria Virginia Alves Martins, Michael Martínez-Colón, Layla C. da Silva, Celma Menezes, et al.. Bioaccumulation of potentially toxic elements in Ammonia tepida (foraminifera) from a polluted coastal area. Journal of South American Earth Sciences, 2022, 115, ⟨10.1016/j.jsames.2022.103741⟩. ⟨insu-03664869⟩

Share

Metrics

Record views

0