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首页> 外文期刊>Environmental Science & Technology >Speciation of ~(129)I and ~(127)I in Seawater and Implications for Sources and Transport Pathways in the North Sea
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Speciation of ~(129)I and ~(127)I in Seawater and Implications for Sources and Transport Pathways in the North Sea

机译：海水中〜（129）I和〜（127）I的形态及其对北海来源和运输途径的影响

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摘要

Surface seawater samples collected from the North Sea and English Channel were analyzed for total ~(129)I and ~(127)I, as well as for iodide and iodate. Relatively high ~(129)I concentrations (2-3 × 10~(11) atoms/L) were observed in the northern part of the English Channel and in the southeastern North Sea. The atomic ratio of ~(129)I/~(129)I decreases from the eastern (1.0-1.9 × 10~(-6)) to the western (4-6 × 10~(-8)) parts of the North Sea and from the northeastern (1.5 × 10~(-6))to southwestern (1-5 × 10~8) parts of the English Channel. The ratios of iodide to iodate are 0.1-0.5 and 0.5-1.6 for ~(127)I and ~(129)I, respectively, in open seawaters, whereas these ratios range from 0.6 to 1.3 and 0.8 to 2.2, respectively, in coastal waters. The results suggest that (1) imprints of the La Hague facility dominates the ~(129)I distribution in the surface water of the North Sea, (2) reduction of iodate to iodide is relatively fast during the transport to the European continental coast, (3) oxidation of newly produced ~(129)I~- to ~(129)IO_3~- is insignificant during water exchange between the coastal area and open sea, (4) reduction of iodate and oxidation of iodide in the open sea seems to be a slow process.
机译：分析了从北海和英吉利海峡收集的地表海水样品中的总〜（129）I和〜（127）I，以及碘化物和碘酸盐。在英吉利海峡的北部和北海东南部观察到相对较高的〜（129）I浓度（2-3×10〜（11）原子/ L）。 〜（129）I /〜（129）I的原子比从北部的东部（1.0-1.9×10〜（-6））减少到西部（4-6×10〜（-8））海洋，从英吉利海峡的东北（1.5×10〜（-6））到西南（1-5×10〜8）部分。在开阔海水中，〜（127）I和〜（129）I的碘化物与碘酸盐的比率分别为0.1-0.5和0.5-1.6，而沿海地区的比率分别为0.6-1.3和0.8-2.2水域。结果表明，（1）拉海牙设施的烙印主导着北海地表水的〜（129）I分布；（2）在运输到欧洲大陆海岸期间，碘酸盐向碘化物的还原相对较快， （3）在沿海地区和公海之间的水交换期间，新产生的〜（129）I〜-到〜（129）IO_3〜-的氧化作用微不足道，（4）在公海中碘酸盐的还原和碘化物的氧化似乎是一个缓慢的过程。

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