Abstract:Accumulation and transmission of heavy metals (Cu, Pb, and Cd) in Chlorella-Ruditapes philippinarum food chain was simulated under controlled conditions, and bioconcentration factors (BCF) of Cu, Pb, and Cd in Chlorella and R. philippinarum and biomagnification factors (BMF) of Cu, Pb,and Cd in Chlorella-R. philippinarum food chain were determined. The results showed that the concentrations of heavy metals in Chlorella and R. philippinarum increased with their concentrations in seawater. The BCFs of Cu, Pb,and Cd in Chlorella varied from 1 626 to 3 161, 3 295 to 7 799, and 5 438 to 9 313, respectively. The BCFs of Cu, Pb,and Cd in R. philippinarum varied from 364 to 821, 1 089 to 1 936, and 245 to736, respectively. The BMFs of Cu, Pb,and Cd in the Chlorella-R. philippinarum food chain varied from 0.22 to 0.26, 0.25 to 0.46, and 0.03 to 0.14, respectively. Under the experimental conditions, the BCFs of Cu, Pb, and Cd by Chlorella were much larger than by R. philippinarum and the BMF showed that there was no obvious biomagnification effect in Chlorella-R. philippinarum food chain.
