Lim P E, Lee C K, Din Z
School of Chemical Sciences, Universiti Sains Malaysia, Penang, Malaysia.
Sci Total Environ. 1998 May 14;216(1-2):147-57. doi: 10.1016/s0048-9697(98)00145-4.
A study on the kinetics of accumulation and depuration of Zn, Cu, Pb and Cd by the oysters (Crassostrea iredalei and Crassostrea belcheri) cultured at two locations in the Merbok Estuary, Malaysia was conducted. A first-order kinetic model was employed to fit the experimental data in order to estimate the rate constants for uptake and elimination processes and to predict the bioconcentration factors (BCF). Among the four metals studied, only the Zn accumulation process could not be modelled using first-order kinetics. The elimination rate constants estimated from depuration data for C. iredalei are found to be much greater than those from accumulation data. The results suggest that the values of kinetic parameters and BCFs derived under conditions of both aqueous and dietary exposure are probably more site- than species-specific.
对在马来西亚默博克河口两个地点养殖的牡蛎（艾氏巨牡蛎和贝氏巨牡蛎）体内锌、铜、铅和镉的积累及净化动力学进行了研究。采用一级动力学模型拟合实验数据，以估算摄取和消除过程的速率常数，并预测生物浓缩系数（BCF）。在所研究的四种金属中，只有锌的积累过程无法用一级动力学进行建模。从艾氏巨牡蛎净化数据估算出的消除速率常数远大于从积累数据得出的速率常数。结果表明，在水相和饮食暴露条件下得出的动力学参数和生物浓缩系数值可能更多地取决于地点而非物种。
