Environ. Sci. Technol. 2000, 34, 4571-4576
Influences of Natural Colloids on Metal Bioavailability to Two Marine Bivalves WEN-XIONG WANG* AND LAODONG GUO† Department of Biology, The Hong Kong University of Science and Technology (HKUST), Clear Water Bay, Kowloon, Hong Kong
We examined the bioavailability of colloid-bound metals [Cd, Cr(III), and Zn] to two marine bivalves (mussel Perna viridis and clam Ruditapes philippinarum) from subtropical and tropical waters. Natural colloids (between 1 nm and 0.2 µm) were isolated by cross-flow ultrafiltration. Bivalves were then exposed to radiolabeled colloids, and the uptake of colloid-bound metals was compared with the uptake of metals associated with the low molecular weight fraction (LMW,
