Fast assessment of bioaccessible metallic contamination in marine sediments

A fast (16min) procedure to assess the bioaccessible metallic fraction of Cd, Cr, Cu, Ni, Pb and Zn simultaneously extracted (SEM) from marine sediments plus an indirect approach to determine acid volatile sulfides (AVS) are presented. For the extraction process magnetic agitation was compared with...

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Bibliographic Details
Published in:Marine pollution bulletin 2017-12, Vol.125 (1-2), p.310-317
Main Authors: Terán-Baamonde, J., Carlosena, A., Soto-Ferreiro, R.M., Andrade, J.M., Prada, D.
Format: Article
Language:English
Subjects:
Acid volatile sulfides
Bioaccessible metallic fraction
Cadmium
Chromium
Contamination
Copper
Drowned valleys
Environmental Monitoring
Fast dilute-HCl extraction
Geologic Sediments - analysis
Lead
Marine pollution
Marine pollution assessment
Marine sediments
Metals
Metals, Heavy - analysis
Nickel
Probes
Procedures
Sediment pollution
Sediments
SEM-AVS criterion
Spain
Stirring
Studies
Sulfides - analysis
Sulfur
Sulphur
Ultrasonic scanners
Underwater resources
Water Pollutants, Chemical - analysis
Zinc
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Summary:A fast (16min) procedure to assess the bioaccessible metallic fraction of Cd, Cr, Cu, Ni, Pb and Zn simultaneously extracted (SEM) from marine sediments plus an indirect approach to determine acid volatile sulfides (AVS) are presented. For the extraction process magnetic agitation was compared with ultrasonic stirring (using a bath and a probe), and several stirring times were assayed. The proposed SEM procedure uses an ultrasonic probe and 1mL of HCl. It dramatically minimizes the turnaround time and the residues. AVS were evaluated as the difference between the amounts of sulphur in the solid residue after the extraction and total sulphur in the original sample. These procedures are fast, easy to implement and cost-effective to assess the potential risk posed by metals in marine sediments. They were tested using several CRMs and applied to sediments from two Galician Rias (NW Spain); their SEM-AVS differences indicated no biological risk. [Display omitted] •Reliable and fast method to assess bioaccessible metallic fraction of sediments.•Indirect approach to determine acid volatile sulfides (AVS)•SEM-AVS as a screening methodology for metallic marine pollution.
ISSN:0025-326X
1879-3363
DOI:10.1016/j.marpolbul.2017.08.033