Perturbations of the Natural Lead Depth Profile in the Sargasso Sea by Industrial Lead
Perturbations of the Natural Lead Depth Profile in the Sargasso Sea by Industrial Lead
复制标题
工业铅对马尾藻海天然铅深度剖面的扰动
DOI：
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发表时间：
1983
期刊：
影响因子：
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通讯作者：
C. Patterson
中科院分区：
文献类型：
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作者：
B. Schaule;C. Patterson
溶解铅的浓度测定同位素稀释质谱法在17个海水样品的深度剖面收集下严格的污染控制站在北方马尾藻海，百慕大西北250公里。从地表到400米，溶解铅浓度约为170 pmol·kg −1，然后急剧下降到2000米深度以下的相对恒定值25 pmol·kg−1。这种在水柱上部的大浓度富集与早些时候在东北太平洋中部观察到的分布相一致，它证实了铅在开阔洋水柱中出现的独特特征：铅的深度分布与大多数其他痕量金属的深度分布明显不同，后者显示出在表层沃茨中的浓度耗尽。
Concentrations of dissolved lead were determined by isotope dilution mass spectrometry in 17 seawater samples of a depth profile collected under strict contamination control at a station in the northern Sargasso Sea, 250 km northwest of Bermuda. Dissolved lead concentrations were about 170 pmol•kg −1 from the surface down to 400 m, then declined sharply to relatively constant values of 25 pmol•kg−1 below 2000 m depth. This large concentration enrichment in the upper part of the water column is concordant with the distribution observed earlier in the central northeast Pacific, and it confirms the unique character of the occurrence of lead in open ocean water columns: the depth profile for lead differs markedly from those for most other trace metals, which show concentration depletions in surface waters instead.