| 摘要: |
| 海水中的痕量金属在海洋生物地球化学循环中至关重要。本研究在严格采用痕量金属洁净（trace-metal clean）采样和分析测试技术的前提下，于2016年7月采集了渤海与黄海表、底层海水水样，获得黄、渤海几种痕量金属（Cu、Ni、Co、Zn）的空间分布特征。研究结果显示，黄、渤海海水中痕量金属的空间分布具有近岸高、远岸低的特点，体现了人类活动对近岸海域的影响，而其在局部海域的分布则受到沿岸流、冷水团、沉积物再悬浮过程以及生物过程等因素的影响。Cu、Ni、Co在黄、渤海海水中的分布特征较为类似，平均浓度由高到低依次为渤海 > 北黄海 > 南黄海，而溶解态Zn的分布则与其他几种金属不同，在黄、渤海平均浓度类似，整体偏低，具有其特殊性。本研究测定的几种痕量金属在黄、渤海海水中的浓度较以往报道数据偏低，其中易污染的痕量金属Zn的浓度更是低近1-3个数量级，体现了痕量洁净采样和测试方法的重要性。 |
| 关键词: 黄海 渤海 痕量金属 分布特征 影响因素 |
| DOI：10.11693/hyhz20190300051 |
| 分类号:P734.2 |
| 基金项目:国家自然科学基金，41776095号。 |
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| DISTRIBUTION CHARACTERISTICS AND INFLUENCING FACTORS OF SEVERAL DISSOLVED TRACE METALS (Cu, Ni, Co, Zn) IN THE YELLOW SEA AND THE BOHAI SEA |
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ZHEN Xiao-Tong1, LI Li1,2, WANG Xiao-Jing1, REN Yi-Jun1
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1.First Institute Of Oceanography, Ministry of Natural Resources, Qingdao 266061, China;2.Pilot Marine Science and Technology Pilot National Laboratory(Qingdao), Qingdao 266237, China
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| Abstract: |
| Trace metals play an important role in marine biogeochemical cycling processes. In this study, we utilized a strict trace-metal clean sampling and analytical techniques, and collected seawater samples from the Bohai Sea and the Yellow Sea in July 2016. The total dissolved trace metals (Cu, Ni, Co, Zn) distributions in the Bohai Sea and the Yellow Sea are charaterized. In general, the distribution of the trace metals show a decreasing trend from near shore to off shore, which reflects the anthropogenic input into the coastal water. Regional distributions of dissolved trace metals in seawater are influenced by coastal current, cold water mass, sediment resuspension, and biological processes. The distribution patterns of Cu, Ni, and Co are similar, in average concentrations in a descending order of the Bohai Sea > north Yellow Sea > south Yellow Sea. However, the distribution of dissolved Zn is different from the other three metals, showing relatively low and similar average concentrations in the Bohai Sea and Yellow Sea. The trace metals concentrations reported in this study are lower than those reported previously, and Zn is even lower by 1-3 orders of magnitude, which reflects the importance of trace-metal clean sampling and analytical methods. |
| Key words: the Yellow Sea the Bohai Sea trace metals distribution characteristics influencing factors |
