| Comparison of copper speciation in the Zhujiang River Estuary between summer and winter:implication for upwelling current |
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| 作者姓名： | LONG Aimin CHEN Shaoyong YAN Wen TIAN Zhenlong |
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| 作者单位： | [1]South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China |
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| 基金项目： | supported by the Innovative Program of Chinese Academy of Sciences under contract，广东省自然科学基金，华南海海洋研究所创新项目，中国科学院资助项目 |
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| 摘 要： | The contents of total copper, total dissolved copper, particulate copper, and free ion copper in the Zhujiang River Estuary were investigated in July 2002 and January 2003 respectively, and the spatial distribution trend of these species of copper were compared in two cruises. It was found that, in summer, the total copper content in the Zhujiang River Estuary increased with salinity, while the content office ion copper decreased with salinity. However, in winter, the contents of total copper and free ion copper both decreased with salinity. So, it could be concluded that, copper content and speciation in the Zhujiang River Estuary were regulated by other factors than runoffdiffusion such as upwelling current. In order to prove the spatial trend of rice ion copper content in the Zhujiang River Estuary, the cultivation of Dunaliella tertiolecta in waters obtained from sampling stations with different salinities was carried out, and the copper uptake by algae cells was measured then. It was found that, the cells＇ uptake of copper increased with rice ion copper, not the content of total copper.
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| 关 键 词： | 珠江 重金属污染 铜 生态环境 冬季 夏季 |
| 收稿时间： | 2004-11-13 |
| 修稿时间： | 2005-02-16 |
Comparison of copper speciation in the Zhujiang River Estuary between summer and winter:implication for upwelling current |
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| LONG Aimin,CHEN Shaoyong,YAN Wen,TIAN Zhenlong.Comparison of copper speciation in the Zhujiang River Estuary between summer and winter:implication for upwelling current[J].Acta Oceanologica Sinica,2005,24(4):72-80. |
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| Authors: | LONG Aimin CHEN Shaoyong YAN Wen and TIAN Zhenlong |
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| Institution: | South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China |
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| Abstract: | The contents of total copper, total dissolved copper, particulate copper, and free ion copper in the Zhujiang River Estuary were investi-gated in July 2002 and January 2003 respectively, and the spatial distribution trend of these species of copper were compared in twocruises. It was found that, in summer, the total copper content in the Zhujiang River Estuary increased with salinity, while the contentof free ion copper decreased with salinity. However, in winter, the contents of total copper and free ion copper both decreased withsalinity. So, it could be concluded that, copper content and speciation in the Zhujiang River Estuary were regulated by other factorsthan runoff diffusion such as upwelling current. In order to prove the spatial trend of free ion copper content in the Zhujiang River Es-tuary, the cultivation of Dunaliella tertiolecta in waters obtained from sampling stations with different salinities was carried out, andthe copper uptake by algae cells was measured then. It was found that, the cells' uptake of copper increased with free ion copper, notthe content of total copper. |
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| Keywords: | speciation copper Zhujiang River Estuary |
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