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Effect of total cadmium and organic complexing on the uptake of cadmium by the brine shrimp, Artemia franciscana
Blust, R.; Baillieul, M.; Decleir, W. (1995). Effect of total cadmium and organic complexing on the uptake of cadmium by the brine shrimp, Artemia franciscana. Mar. Biol. (Berl.) 123(1): 65-73. https://dx.doi.org/10.1007/BF00350324
In: Marine Biology: International Journal on Life in Oceans and Coastal Waters. Springer: Heidelberg; Berlin. ISSN 0025-3162; e-ISSN 1432-1793, meer
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Artemia franciscana Kellog, 1906 [WoRMS]
Marien/Kust |
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- Blust, R., meer
- Baillieul, M.
- Decleir, W., meer
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| Abstract |
The effect of total cadmium and organic complexing on the rate of cadmium uptake by the brine shrimp, Artemia franciscana has been studied in chemically defined saltwater solutions. The uptake of cadmium from solution by the laboratory-reared brine shrimp displays saturable uptake kinetics. Uptake of cadmium is linear in time up to a total cadmium concentration of 200 mu moll(-1) and saturates above 800 mu moll(-1). Complexation of cadmium with organic ligands decreases the uptake of the metal by the brine shrimp. This is in agreement with the view that the availability of cadmium to aquatic organisms is related to the activity of the free cadmium ion in the solution. There is no evidence that the direct uptake of cadmium complexes is important in determining uptake of cadmium. Cadmium uptake is not, however, a mere function of the free cadmium ion activity in the solution, i.e., cadmium uptake rates may differ by an order of magnitude for the same free cadmium ion activity depending on the complexation conditions. In addition to controlling the free cadmium ion activity, the role of organic ligands in metal ion buffering and metal ion masking appear important factors in determining the availability of the metal to the organism. |
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