Input, particle reactivity, and (bio)geochemical cycling of the transition metals from subgroups IV, V, and VI (Ti-Zr-Hf, V-Nb-Ta, Cr-Mo-W) in the Atlantic

大西洋中 IV、V 和 VI 亚族（Ti-Zr-Hf、V-Nb-Ta、Cr-Mo-W）过渡金属的输入、颗粒反应性和（生物）地球化学循环

• 批准号: 194176635
• 负责人: Professorin Dr. Andrea Koschinsky
• 金额: --
• 依托单位: Department of Physics and Earth Sciences
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2011
• 资助国家: 德国
• 起止时间: 2010-12-31 至 2014-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/194176635?language=en
• 关键词: Input; particle; reactivity; bio; geochemical

The focus of this proposal is the marine geochemistry of the trace element groups Ti-Zr-Hf, V-Nb-Ta, and Cr-Mo-W, elements of which the behavior and processes in seawater are partly not well understood. However, they are of importance in the marine system either biologically (as micronutrients or microtoxins), or contribute to the formation of valuable ore deposits on the seafloor, such as ferromanganese nodules and crusts. Several of them also serve (especially via their isotopic signatures) as proxies for elemental sources into the ocean, water mass movements, or paleo redox conditions. Correspondingly, the impact of dust or riverine sources and subsequent (bio)geochemical cycling of the particle-reactive elements of the first two groups, and of different redox conditions in the oxygen minimum zone on the group of redox-sensitive elements (Cr, Mo, in contrast to W), will be investigated. Apart from the listed 9 elements, we will include Al (as a tracer for dust input), Fe (as a potential trace metal scavenger in the form of Fe oxyhydroxides), Y as a well characterized particle -reactive element, and U (to compare with the geochemically similar Mo) to interpret sources and cycling. The samples for the project were taken by trace-metal clean sampling of the water column at 17 CTD stations across the Atlantic during cruise M81/1. Apart from the determination of total concentrations, physical (dissolved – colloidal – particulate) and chemical speciation analyses (free ions, organic complexes, redox speciation) will be part of the work schedule.

本建议的重点是微量元素组Ti-Zr-Hf、V-Nb-Ta和Cr-Mo-W的海洋地球化学，这些元素在海水中的行为和过程部分还不清楚。然而，它们在海洋系统中具有重要的生物学意义（作为微量营养素或微毒素），或有助于海底有价值矿床的形成，如铁锰结核和结壳。它们中的一些还可以（特别是通过它们的同位素特征）作为海洋元素来源，水团运动或古氧化还原条件的代理。相应地，灰尘或河流源和随后的（生物）地球化学循环的颗粒活性元素的前两组，和不同的氧化还原条件下的氧最小区的氧化还原敏感元素（铬，钼，相比W）组的影响，将进行调查。除了所列的9种元素外，我们还将包括Al（作为粉尘输入的示踪剂）、Fe（作为Fe羟基氧化物形式的潜在痕量金属清除剂）、Y（作为充分表征的颗粒反应性元素）和U（与地球化学相似的Mo进行比较），以解释来源和循环。 该项目的样品是在M81/1号巡航期间在大西洋17个CTD站对水柱进行痕量金属清洁取样。除了确定总浓度外，物理（溶解-胶体-颗粒）和化学形态分析（游离离子、有机复合物、氧化还原形态分析）将是工作计划的一部分。

项目成果

Determination of Ti, Zr, Nb, V, W and Mo in seawater by a new online-preconcentration method and subsequent ICP–MS analysis

• DOI: 10.1016/j.dsr.2014.11.014
• 发表时间: 2015-04
• 作者: S. Poehle;K. Schmidt;A. Koschinsky

Depth distribution of Zr and Nb in seawater: The potential role of colloids or organic complexation to explain non-scavenging-type behavior

海水中 Zr 和 Nb 的深度分布：胶体或有机络合在解释非清除型行为中的潜在作用

• DOI: 10.1016/j.marchem.2016.12.001
• 发表时间: 2017
• 期刊: Marine Chemistry
• 影响因子: 3
• 作者: Poehle;Koschinsky
• 通讯作者: Koschinsky

Determination of Zirconium and Vanadium in Natural Waters by Adsorptive Stripping Voltammetry in the Presence of Cupferron, Oxalic Acid and 1,3-Diphenylguanidine

• DOI: 10.1002/elan.201500140
• 发表时间: 2015-08
• 期刊: Electroanalysis
• 影响因子: 3
• 作者: Alexandre Schneider;P. C. Nascimento;D. Bohrer;L. M. Carvalho;A. Guarda;C. Krause;Bruna Avila Wiethan;A. Koschinsky

An experimental study on the mixing behavior of Ti, Zr, V and Mo in the Elbe, Rhine and Weser estuaries

• DOI: 10.1016/j.ecss.2015.12.002
• 发表时间: 2016-03
• 期刊: Estuarine Coastal and Shelf Science
• 影响因子: 2.8
• 作者: Alexandre Schneider;A. Koschinsky;Joseph Kiprotich-;S. Poehle;P. C. Nascimento

Determination of the Natural Dissolved Concentration of Zirconium in Seawater by Adsorptive Stripping Voltammetry

吸附溶出伏安法测定海水中锆的自然溶解浓度

• DOI: 10.1002/elan.201300103
• 发表时间: 2013
• 期刊: Electroanalysis
• 影响因子: 3
• 作者: Schneider;Paulo C. Nascimento;Denise Bohrer;Leandro M. de Carvalho;Ananda Guarda;Daiane Dias;Andrea Koschinsky
• 通讯作者: Andrea Koschinsky