Pathways of superoxide (O2(-)) decay in the Eastern Tropical North Atlantic.
Pathways of superoxide (O2(-)) decay in the Eastern Tropical North Atlantic.
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DOI：
10.1021/es401658t
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发表时间：
2013-08
影响因子：
11.4
通讯作者：
K. Wuttig;M. Heller;P. Croot
中科院分区：
文献类型：
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作者：
K. Wuttig;M. Heller;P. Croot
超氧化物（O2（-）：IUPAC名称二氧化物（·1-）是海洋中重要的瞬态活性氧（ROS），在氧气（O2）氧化还原转化为过氧化氢（H2 O2）的过程中作为中间体形成，反之亦然。这种活性很高、寿命很短的自由基阴离子可以通过海洋中的光化学和生物过程产生。在本文中，我们研究的分解率O2（-）在整个水柱，使用新的数据收集在东热带北大西洋（埃特纳）海洋。对于这种方法，我们采用了半因子实验设计，以确定和量化的主要确定汇在海洋中的路径。在这项工作中，我们占据了六个站，两个在西非大陆架和四个开放的海洋站，包括CVOO时间序列网站毗邻佛得角。我们的研究结果表明，在撒哈拉沙漠的气溶胶和沿海沉积物再悬浮的影响下，在海洋表面，超氧化物的主要衰变途径是通过与锰（II）和有机物的反应。
Superoxide (O2(-): IUPAC name dioxide (•1-)) is an important transient reactive oxygen species (ROS) in the ocean formed as an intermediate in the redox transformation of oxygen (O2) into hydrogen peroxide (H2O2) and vice versa. This highly reactive and very short-lived radical anion can be produced both via photochemical and biological processes in the ocean. In this paper we examine the decomposition rate of O2(-) throughout the water column, using new data collected in the Eastern Tropical North Atlantic (ETNA) Ocean. For this approach we applied a semi factorial experimental design to identify and quantify the pathways of the major identified sinks in the ocean. In this work we occupied six stations, two on the West African continental shelf and four open ocean stations, including the CVOO time series site adjacent to Cape Verde. Our results indicate that, in the surface ocean impacted by Saharan aerosols and coastal sediment resuspension, the main decay pathways for superoxide are via reactions with Mn(II) and organic matter.