Cerium Inhibits the Cadmium Uptake of Pacific Oyster Crassostrea gigas
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چکیده
Ce is a potential antagonist of Cd due to their similar ionic radius. Its effect on the bioaccumulation of Cd in pacific oyster Crassostreagigaswas explored through laboratory experiments. The oysters were exposed to 5, 10 and 25 μmol/LCe(NO3)3 in the presence of 25 μg/L Cd 2+ (0.22 μmol/L) for 12 days and the concentrations of Cd, Ca, Zn as well as Cu were indicated in the whole soft tissues and separate organs. Ce in all the three doses significantly inhibited Cd bioaccumulation in the oysters on day 12 and the inhibition ratios reached 30%, 31% and 41% respectively. Organ-level analysis revealed that Ce possibly exerted its inhibitory action by delaying the saturated absorption of Cd in the gill. Ce in all the three doses antagonized the negative effects of Cd on Ca concentration and restored the its level to the normal range on day 12, but 25 μmol/L Ce decreased the Zn and Cu concentrations by up to 27% and 88% respectively. It was concluded that Ce could markedly inhibitthe Cd bioaccumulation of Crassostreagigasand the presence of Ce must be considered in marine pollution assessment by using oysters as the bioindicator.
منابع مشابه
Effects of lanthanum on the cadmium uptake of pacific oyster Crassostrea gigas
La in the three levels inhibited Cd bioaccumulation by up to 36%, 44% and 25% respectively on day 12. Organ-level analysis revealed that La possibly exerted its inhibitory action by delaying the saturated absorption of Cd in the gill. La antagonized the negative effects of Cd on Ca content, but 25 μmol/L La significantly decreased the Zn content in the oysters. It was concluded that La markedly...
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تاریخ انتشار 2016