Speciation of Iron In A Multiphasic Atmosphere

在这两个国家的大气中， 水相和固相。 三价铁已被证明 是SO2自氧化的重要催化剂， 在云和雾中伴随产生的酸性。 最近 实地研究提供了强有力的证据表明，铁来自 大气沉降是各种植物生长的限制性营养素， 在开阔海洋的某些区域的浮游植物种类。 因此 铁以各种形式（即氧化还原）在大气中沉积 状态和物种）可能是控制 海洋浮游植物的生产，这反过来又可能影响 大气中的二氧化碳含量 私家侦探建议调查 大气水滴和气溶胶中铁的形态 从不同地点收集的样本， 城市、农村和偏远地区。 他们计划确定 各种固相和水相化学形式， 云、雾和 从海洋和大陆环境中收集的雨水， 在这个框架内解释实验观察 热力学和动力学模型的结合

Iron is found at variable levels in the atmosphere in both aqueous-phases and solid phases. Ferric iron has been shown to be an important catalyst for the autoxidation of SO2 and concomitant generation of acidity in clouds and fogs. Recent field research has provided strong evidence that Fe derived from atmospheric deposition is a limiting growth nutrient for various species of phytoplankton in some regions of the open ocean. Thus the atmospheric deposition of iron in various forms (i.e. redox states and species) could be a critical factor in controlling oceanic phytoplankton production which in turn may affect atmospheric CO2 levels. The PIs propose to investigate the detailed chemical speciation of iron in atmospheric water droplets and in aerosol samples collected from a variety of locations representative of urban, rural and remote atmospheres. They plan to determine the various solid-phase and aqueous-phase chemical forms and oxidation states (speciation) of iron present in cloud-, fog- and rainwater collected from marine and continental environments and to interpret the experimental observations within the framework of coupled thermodynamic and kinetic models.