A Comparison Of Sequential Extraction Methods Used For Bioavailability Assessment Of Potential Toxic Element

Martínez-Colón, Michael; Ross, Benjamin; Owens, Jeremy D.; Duong, Gwendoline; Fajemila, Olugbenga T.; Bouchet, Vincent M. P.; Martins, María Virginia Alves

doi:10.61551/gsjfr.55.3.276

i

A Comparison Of Sequential Extraction Methods Used For Bioavailability Assessment Of Potential Toxic Element

2025
By Martínez-Colón, Michael ; Ross, Benjamin ; Owens, Jeremy D. ; ...

Details

Journal Title:

Journal of Foraminiferal Research
Personal Author:

Martínez-Colón, Michael ; Ross, Benjamin ; Owens, Jeremy D. ; Duong, Gwendoline ; Fajemila, Olugbenga T. ; Bouchet, Vincent M. P. ; Martins, María Virginia Alves
NOAA Program & Office:

OAR (Oceanic and Atmospheric Research) ; Education and outreach ; Sea Grant
Description:

Understanding potentially toxic element (PTE) bioavailability has eluded the research community for decades. Here we compare three PTE extraction methods that are widely used in foraminiferal pollution studies. Evident discrepancies between methods were observed when diversity indices and relative abundances were influenced differently by the same and, in some cases, by different PTEs depending on the method. This was reflected in the canonical correspondence analysis (CCA), where Cr-Ni (Method B) and Zn-Pb-Cu (Method C) had a respective positive and negative influence over the foraminiferal relative abundances while no positive correlations were observed for Method A. These discrepancies stem from each method extracting different concentration levels of the same PTE from the same sediment samples. We recommend bioavailable PTEs to be extracted from the following fractions: (1) mud-bound from Method A (F1- exchangeable); (2) organic-bound from Method B (F3- oxidizable); and (3) completely avoid using Method C.
Source:

Journal of Foraminiferal Research, 55(3), 276-295
DOI:

https://doi.org/10.61551/gsjfr.55.3.276
ISSN:

1943-264X ; 0096-1191
Format:

pdf
Publisher:

Cushman Foundation for Foraminiferal Research
Document Type:

Journal Article
Funding:

Grant no. NA18OAR4170089 ; Grant no. NA21SEC4810004
Rights Information:

Other
Compliance:

Submitted
Main Document Checksum:

urn:sha-512:197ecf88c96d2a4c5e6bb20fb93294de7f7eb3c51492a548fc39e381d6e219643aad51a4a6fad1ad24adcd8270f6917a57ded12e49adc291307356dc28f0ad6b
Download URL:

https://repository.library.noaa.gov/view/noaa/72252/noaa_72252_DS1.pdf
File Type:

[PDF - 2.30 MB ]

ON THIS PAGE

Details

The NOAA IR serves as an archival repository of NOAA-published products including scientific findings, journal articles, guidelines, recommendations, or other information authored or co-authored by NOAA or funded partners. As a repository, the NOAA IR retains documents in their original published format to ensure public access to scientific information.