𝔖 Bobbio Scriptorium
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Bioaccumulation and Partitioning of Cadmium within the Freshwater Mussel Dreissena polymorpha Pallas

✍ Scribed by Dr. Rüdiger Bias; Dr. Ludwig Karbe

Publisher
John Wiley and Sons
Year
1985
Tongue
English
Weight
668 KB
Volume
70
Category
Article
ISSN
1434-2944

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✦ Synopsis

Kinetics of uptake, partitioning and elimination of cadmium were investigated in experimental studies with the freshwater mussel, Dreissena polymorpha. The radioactive cadmium isotopes *WCd and 115Cd were used as tracers. Shells, soft parts and body fluid of the mussel exhibited considerable differences in accumulation and elimination. Accumulation factors up t o more than 70,000 were calculated for t h e periostracum, whereas accumulation factors for the whole mussels ranging up to 3,000 were calculated. The shells bound a great deal of cadmium, but only loosely, and the metal could be readily eliminated after transfer to uncontaminated water. In contrast, no significant amounts of the cadmium incorporated in the soft parts were eliminated. The results indicate that the major portion of cadmium in the soft parts is strongly bound and cannot be eliminated by exchange processes.

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