Collaborative Research: Interactive Influences of Atmospheric Deposition and Phytoplankton Blooms on Trace Metal Speciation

最近对海洋中铁的生物地球化学的研究激发了人们对大气来源的生物活性元素铁、锌、钴和铜在表层海水中这些痕量金属的形态、有机络合和生物有效性方面的相互作用的兴趣。结合计划中的中西太平洋实地考察(美国国家科学基金会OCE-0117917--测量、着陆和切割)，这项合作研究工作将采用一系列以电化学和质谱学为基础的分析技术，这些技术对表层海水中发现的铁、钴、锌和铜元素的亚纳摩尔浓度非常敏感。利用竞争性配基平衡实验和电化学研究中使用的灵敏伏安溶出分析，将提供有机配基结合强度的相对指示，无论是在表面浮游植物繁衍期间产生的，还是在大气降水或干沉积中发现的。

ABSTRACTOCE-0136977OCE-0136298Recent investigations of the biogeochemistry of iron in the ocean has spurred interest in the interaction of atmospherically sourced bioactive elements including iron, zinc, cobalt and copper on the speciation, organic complexation and bioavailability of these trace metals in surface seawater. In conjunction with a planned field expedition to the central western Pacific (NSF OCE-0117917- Measures, Landing and Cutter) this collaborative research effort will employ a range of electrochemical and mass spectrometric based analytical techniques uniquely sensitive to the sub-nanomolar concentrations of the elements Fe, Co, Zn and Cu found in surface seawater. The use of competitive ligand equilibration experiments along with the sensitive voltammetric stripping analyses used in the electrochemical studies will provide relative indication of the binding strength of organic ligands either produced during surface phytoplankton blooms or found in atmospheric precipitation or dry deposition