CAS OpenIR  > 中科院上海应用物理研究所2011-2019年
Speciation of Cu and Zn in Two Colored Oyster Species Determined by X-ray Absorption Spectroscopy
Tan, QG; Wang, Y; Wang, WX
2015
Source PublicationENVIRONMENTAL SCIENCE & TECHNOLOGY
Volume49Issue:11Pages:6919—6925
Subtype期刊文献
AbstractIn oysters, Cu and Zn concentration can reach extraordinarily high (1-2% of tissue dry weights), leading to intense green or blue colors in oyster tissues. It is thus puzzling how oysters detoxify the excessively accumulated metals. Here, we used X-ray absorption spectroscopy to examine the Cu and Zn speciation in two colored oysters (Crassostrea hongkongensis and Crassostrea sikamea) collected from a severely metal-contaminated estuary. In contaminated oysters, we found a much higher proportion of tissue Cu and Zn as oxygen- or nitrogen-bonded species, contrasting to the sulfur-bonded (thiolate) species in normal oysters. Speciation of Cu and Zn in mantle was similar to that in gills, both of which were different from that in the digestive gland. In C. sikamea, the difference of metal speciation between normal and contaminated individuals was of similar pattern but less pronounced than that in C. hongkongensis. In normal oysters, Cu existed mainly as Cu(I) bound to sulfur, whereas in contaminated oysters mainly as Cu(II) bound to oxygen or nitrogen. Our study provided direct and semiquantitative information on the changes of metal speciation in contaminated oysters, indicating that oysters could efficiently detoxify the excessively accumulated Cu and Zn by storing them in oxygen- and nitrogen-bonded complexes in metal-rich environments.
KeywordCrassostrea-gigas Ostrea-edulis Zinc Speciation Heavy-metals Copper Metallothionein Detoxification Localization Complexes Term
Indexed BySCI
Language英语
Document Type期刊论文
Identifierhttp://ir.sinap.ac.cn/handle/331007/24574
Collection中科院上海应用物理研究所2011-2019年
Recommended Citation
GB/T 7714
Tan, QG,Wang, Y,Wang, WX. Speciation of Cu and Zn in Two Colored Oyster Species Determined by X-ray Absorption Spectroscopy[J]. ENVIRONMENTAL SCIENCE & TECHNOLOGY,2015,49(11):6919—6925.
APA Tan, QG,Wang, Y,&Wang, WX.(2015).Speciation of Cu and Zn in Two Colored Oyster Species Determined by X-ray Absorption Spectroscopy.ENVIRONMENTAL SCIENCE & TECHNOLOGY,49(11),6919—6925.
MLA Tan, QG,et al."Speciation of Cu and Zn in Two Colored Oyster Species Determined by X-ray Absorption Spectroscopy".ENVIRONMENTAL SCIENCE & TECHNOLOGY 49.11(2015):6919—6925.
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