Chromium bioavailability in aquatic systems impacted by tannery wastewaters. Part 1: Understanding chromium accumulation by indigenous chironomids
Authors:
- D. A. L. Vignati,
- B. J. D. Ferrari,
- J.-L. Roulier,
- M. Coquery,
- E. Szalinska,
- A. Bobrowski,
- A. Czaplicka,
- A. Kownacki,
- J. Dominik
Abstract
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 (<0.45 μm) Cr concentration in overlying waters and pore waters from the surface sediment layers (upper 2 cm) ranged from 3 to 120 μg L −1 , with Cr(VI) representing 0.5–28% of the total filterable Cr. Chromium profiles in pore waters as determined by diffusive equilibration in thin films (DET) and diffusive gradient in thin films (DGT) were comparable. DGT-labile Cr accounted for <2% of the total Cr measured by DET. Although Cr concentrations in sedimentary and aqueous matrices were not directly proportional to Cr levels measured in chironomids, the available findings suggested that Cr inputs from tanneries were bioavailable to resident chironomids. These observations are of particular importance considering that Cr(III), putatively of limited bioavailability and ecotoxicological concern, is the predominant redox form of Cr in bed sediments impacted by tannery discharges. The companion paper provides further insight into Cr bioavailability and effects in tannery impacted ecosystems using a combination of in situ and laboratory approaches.
- Record ID
- CUTa10c21519c454433abeb683de43e0639
- Publication categories
- ;
- Author
- Journal series
- Science of the Total Environment, ISSN 0048-9697, e-ISSN 1879-1026
- Issue year
- 2019
- Vol
- 653
- Pages
- 401-408
- Other elements of collation
- rys.; tab.; wykr.; Bibliografia (na s.) - 407-408; Oznaczenie streszczenia - Abstr.; Numeracja w czasopiśmie - Vol. 653
- Keywords in English
- bioaccumulation, chromium speciation, DET, DGT, sediment cores, voltammery
- DOI
- DOI:10.1016/j.scitotenv.2018.10.259 Opening in a new tab
- URL
- https://www.sciencedirect.com/science/article/pii/S004896971834155X Opening in a new tab
- Language
- eng (en) English
- Score (nominal)
- 200
- Additional fields
- Indeksowana w: Web of Science, Scopus
- Uniform Resource Identifier
- https://cris.pk.edu.pl/info/article/CUTa10c21519c454433abeb683de43e0639/
- URN
urn:pkr-prod:CUTa10c21519c454433abeb683de43e0639
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