INALI   02622
INSTITUTO NACIONAL DE LIMNOLOGIA
Unidad Ejecutora - UE
artículos
Título:
Accumulation and elimination of chromium by freshwater species exposed to spiked sediments
Autor/es:
MARCHESE, M.R; GAGNETEN, A.M.; PARMA, M.J.; PAVE, P.J.
Revista:
ARCHIVES OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY
Editorial:
Springer
Referencias:
Año: 2007
ISSN:
0090-4341
Resumen:
The bioaccumulation and elimination capacity of chromium were examined in four freshwater species: the submersed aquatic plant Ceratophyllum demersum (Ceratophyllaceae), the oligochaete Limnodrilus udekemianus (Tubificidae), the crab Zilchiopsis collastinensis (Decapoda), and the fish Cnesterodon decemmaculatus (Poeciliidae). All of the species were exposed simultaneously to sediments spiked with Cr (K2Cr2O7) at different concentrations for 28 days, followed by 7 days without Cr to evaluate the concentration of residual Cr. We found that Cr accumulated in the tissues of all four species. The highest bioconcentration factor obtained for each species is as follows: C. demersum, 718.66 (±272.91); L. udekemianus, 172.55(±80.8), Z. collastinensis, 67.72 (±35.4); C. decemmaculatus, 23.11 (±12.82), all at 28 days of exposure.Ceratophyllum demersum (Ceratophyllaceae), the oligochaete Limnodrilus udekemianus (Tubificidae), the crab Zilchiopsis collastinensis (Decapoda), and the fish Cnesterodon decemmaculatus (Poeciliidae). All of the species were exposed simultaneously to sediments spiked with Cr (K2Cr2O7) at different concentrations for 28 days, followed by 7 days without Cr to evaluate the concentration of residual Cr. We found that Cr accumulated in the tissues of all four species. The highest bioconcentration factor obtained for each species is as follows: C. demersum, 718.66 (±272.91); L. udekemianus, 172.55(±80.8), Z. collastinensis, 67.72 (±35.4); C. decemmaculatus, 23.11 (±12.82), all at 28 days of exposure.