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| Speciation of Cu and Zn in Two Colored Oyster Species Determined by X-ray Absorption Spectroscopy | |
| Tan, QG; Wang, Y; Wang, WX | |
| 2015 | |
| Source Publication | ENVIRONMENTAL SCIENCE & TECHNOLOGY
 |
| Volume | 49Issue:11Pages:6919—6925 |
| Subtype | 期刊文献 |
| Abstract | In 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. |
| Keyword | Crassostrea-gigas Ostrea-edulis Zinc Speciation Heavy-metals Copper Metallothionein Detoxification Localization Complexes Term |
| Indexed By | SCI |
| Language | 英语 |
| Document Type | 期刊论文 |
| Identifier | http://ir.sinap.ac.cn/handle/331007/24574 |
| Collection | 中科院上海应用物理研究所2011-2020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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| Speciation of Cu and（1353KB） | 期刊论文 | 作者接受稿 | 开放获取 | CC BY-NC-SA | View Download | |
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