Speciation of Cu and Zn in Two Colored Oyster Species Determined by X-ray Absorption Spectroscopy
文献类型：期刊论文
| 作者 | Tan, QG; Wang, Y; Wang, WX |
| 刊名 | ENVIRONMENTAL SCIENCE & TECHNOLOGY
 |
| 出版日期 | 2015 |
| 卷号 | 49期号:11页码:6919—6925 |
| 关键词 | CRASSOSTREA-GIGAS OSTREA-EDULIS ZINC SPECIATION HEAVY-METALS COPPER METALLOTHIONEIN DETOXIFICATION LOCALIZATION COMPLEXES TERM |
| 英文摘要 | 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. |
| 收录类别 | SCI |
| 语种 | 英语 |
| 公开日期 | 2015-12-24 |
| 源URL | [http://ir.sinap.ac.cn/handle/331007/24574]  |
| 专题 | 上海应用物理研究所_中科院上海应用物理研究所2011-2017年 |
| 推荐引用方式 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. |
入库方式： OAI收割
来源：上海应用物理研究所
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