10.1021/es301225d.s001
Stuart L. Simpson
Stuart L.
Simpson
Héloïse Yverneau
Héloïse
Yverneau
Anne Cremazy
Anne
Cremazy
Chad V. Jarolimek
Chad V.
Jarolimek
Helen
L. Price
Helen
L.
Price
Dianne F. Jolley
Dianne F.
Jolley
DGT-Induced Copper Flux
Predicts Bioaccumulation and
Toxicity to Bivalves in Sediments with Varying Properties
American Chemical Society
2012
silty sediment types
metal bioavailability
antifouling paint particles
benthic bivalve Tellina deltoidalis
DGT technique
sediment quality assessment
measure copper fluxes
water copper concentrations
2012-08-21 00:00:00
Journal contribution
https://acs.figshare.com/articles/journal_contribution/DGT_Induced_Copper_Flux_Predicts_Bioaccumulation_and_Toxicity_to_Bivalves_in_Sediments_with_Varying_Properties/2494417
Many regulatory frameworks for sediment quality assessment
include
consideration of contaminant bioavailability. However, the “snap-shots”
of metal bioavailability provided by analyses of porewaters or acid-volatile
sulfide-simultaneously extractable metal (AVS-SEM) relationships do
not always contribute sufficient information. The use of inappropriate
or inadequate information for assessing metal bioavailability in sediments
may result in incorrect assessment decisions. The technique of diffusive
gradients in thin films (DGT) enables the in situ measurement of metal
concentrations in waters and fluxes from sediment porewaters. We utilized
the DGT technique to interpret the bioavailability of copper to the
benthic bivalve <i>Tellina deltoidalis</i> in sediments
of varying properties contaminated with copper-based antifouling paint
particles. For a concentration series of copper-paint contaminated
sandy, silty-sand, and silty sediment types, DGT-probes were used
to measure copper fluxes to the overlying water, at the sediment-water
interface, and in deeper sediments. The overlying water copper concentrations
and DGT-Cu fluxes were shown to provide excellent exposure concentration–response
relationships in relation to lethal effects occurring to the copper-sensitive
benthic bivalve, <i>T. deltoidalis</i>. The study demonstrates
the strength of the DGT technique, which we expect will become frequently
used for assessing metal bioavailability in sediments.