Bioavailability of Cr(III) and Cr(VI) to Marine Mussels from Solute and Particulate Pathways

Mussels have been extensively used as biological monitors of coastal contamination. This study measured the assimilation efficiencies (AEs) of Cr(III) and Cr(VI) in the mussel Mytilus edulis from ingested food, uptake from the dissolved phase, and the physiological efflux rates following uptake. A b...

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Bibliographic Details
Published in:Environmental science & technology 1997-02, Vol.31 (2), p.603-611
Main Authors: Wang, Wen-Xiong, Griscom, Sarah B, Fisher, Nicholas S
Format: Article
Language:English
Subjects:
Animal, plant and microbial ecology
Applied ecology
aquatic organisms
Biochemistry
Biological and medical sciences
Chemical elements
Contamination
Ecotoxicology, biological effects of pollution
Effects of pollution and side effects of pesticides on protozoa and invertebrates
environmental degradation
Fundamental and applied biological sciences. Psychology
Marine
Mollusks
Mytilus edulis
pollution
waste management
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Summary:Mussels have been extensively used as biological monitors of coastal contamination. This study measured the assimilation efficiencies (AEs) of Cr(III) and Cr(VI) in the mussel Mytilus edulis from ingested food, uptake from the dissolved phase, and the physiological efflux rates following uptake. A bioenergetic-based kinetic model was then employed to determine the relative contributions of different Cr species and their accumulation pathways to the overall concentration of Cr in mussels. The concentration factors of Cr(III) in four diverse marine phytoplankters ranged between 104 and 105, whereas for Cr(VI) they were 2 to 5 × 102. Rapid reduction of Cr(VI) to Cr(III) was observed in coastal sediments. AEs of Cr(III) in mussels from ingested sediments were consistently
ISSN:0013-936X
1520-5851
DOI:10.1021/es960574x