Chromium bioavailability in aquatic systems impacted by tannery wastewaters. Part 1: Understanding chromium accumulation by indigenous chironomids

The tanning industry uses large quantities of Cr whose contribution to the contaminant burden of aquatic organisms is not yet fully understood. The present study investigated Cr bioaccumulation by indigenous chironomids in a freshwater ecosystem impacted by tannery effluents. Total Cr content in sed...

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Bibliographic Details
Published in:The Science of the total environment 2019-02, Vol.653 (653), p.401-408
Main Authors: Vignati, D.A.L., Ferrari, B.J.D., Roulier, J.-L., Coquery, M., Szalinska, E., Bobrowski, A., Czaplicka, A., Kownacki, A., Dominik, J.
Format: Article
Language:English
Subjects:
Bioaccumulation
Chemical Sciences
Chromium speciation
DET
DGT
Ecotoxicology
Environmental Sciences
Global Changes
Life Sciences
Other
Sediment cores
Toxicology
Voltammery
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Summary:The tanning industry uses large quantities of Cr whose contribution to the contaminant burden of aquatic organisms is not yet fully understood. The present study investigated Cr bioaccumulation by indigenous chironomids in a freshwater ecosystem impacted by tannery effluents. Total Cr content in sediments and in chironomids was determined on several occasions. Chromium distribution among sediments and pore waters, and Cr speciation in overlying and pore waters were studied in detail to understand possible factors controlling Cr bioavailability to chironomids. Total chromium concentration ranged from 69 to over 3000 μg g−1 dry weight in sediments and from negligible to over 300 μg g−1 dry weight in chironomids (values corrected for sediment gut content). Filterable (
ISSN:0048-9697
1879-1026
DOI:10.1016/j.scitotenv.2018.10.259