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Pb uptake by the marine mussel Mytilus sp. Interactions with dissolved organic matter
Sánchez-Marín, P.; Bellas, J.; Mubiana, V.K.; Lorenzo, J.I.; Blust, R.; Beiras, R. (2011). Pb uptake by the marine mussel Mytilus sp. Interactions with dissolved organic matter. Aquat. Toxicol. 102(1-2): 48-57. dx.doi.org/10.1016/j.aquatox.2010.12.012
In: Aquatic Toxicology. Elsevier Science: Tokyo; New York; London; Amsterdam. ISSN 0166-445X; e-ISSN 1879-1514, more
Peer reviewed article  
Available in  Authors 
Keywords
    Analytical techniques > Stripping analysis
    Anodic stripping voltammetry
    Bioavailability
    Chemical elements > Metals > Heavy metals > Lead
    Fauna > Aquatic organisms > Aquatic animals > Shellfish > Marine organisms > Marine molluscs
    Humic substances
    Organic matter > Dissolved organic matter
    Mytilus edulis Linnaeus, 1758 [WoRMS]
    Marine/Coastal
Author keywords
    Metal bioavailability; Lead; Mussel; Humic substances; DOM; Anodic stripping voltammetry
Authors  Top 
  • Sánchez-Marín, P.
  • Bellas, J.
  • Mubiana, V.K., more
  • Lorenzo, J.I., more
  • Blust, R., more
  • Beiras, R.
Abstract
    It is well known that dissolved organic matter binds metal ions and buffers them in natural waters. Although it is believed that a decrease in metal ion concentration should lead to a decrease in metal bioavailability, previous work has shown that Pb uptake by Mytilus edulis gills is greatly enhanced in the presence of humic acids. In the present work, the effect of more soluble organic matter (fulvic acids and DOM extracted from river) on Pb uptake by mussels and their gills is studied. Pb complexation by these organic substances was measured by anodic stripping voltammetry (ASV) and it is proven that Pb uptake by mussel gills in the presence of fulvic acids can be successfully predicted according to ASV-labile Pb concentrations. However, Pb uptake by whole mussels in the presence of river DOM is slightly higher than predicted on the basis of ASV measurements. The possible reasons leading to different effects of DOM on Pb uptake by mussels are discussed according to physicochemical properties of DOM.
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