Investigations of the Influence of Solution Chemistry on YREE Interactions with Particle Surfaces

吸附和溶液络合对海洋中痕量金属的通量和分布起着重要的控制作用。然而，要了解金属离子的吸附行为，需要对溶液化学进行很好的表征。考虑到Y和稀土元素(YREE)具有已知的溶液化学性质，并受到影响海水中其他金属的相同过程的影响，使它们非常适合于研究金属离子的吸附行为。为此，南佛罗里达大学的两个PI建议进行一系列实验室实验，以确定YREE的吸附特性随颗粒类型和溶液化学的变化。对于颗粒类型，PIS计划利用在墨西哥湾收集的MnO2、a-FeOOH、a-Al_2O_3、无定形SiO_2、方解石、文石、石笋(活的/非活的藻类)和天然悬浮物。这项研究将同时使用合成溶液和天然海水。这项研究的结果将有助于更好地理解对海水中活性金属分布起主导控制作用的过程。

ABSTRACTOCE-0136333Adsorption and solution complexation exert important controls on the fluxes and distributions of trace metals in the oceans. However, to understand metal ion adsorptive behavior requires that the solution chemistry be well characterized. Considering that yttrium and the rare earth elements (YREEs) have solution chemistries that are known and are influenced by the same processes that influence other metals in seawater makes them ideally suited to studies of metal ion adsorptive behavior. For this reason, two PIs from the University of South Florida propose to carry out a series of laboratory experiments to determine the adsorption characteristics of YREEs as a function of particle type and solution chemistry. For particle type, the PIs plan to utilize -MnO2, a-FeOOH, a-Al2O3, amorphous SiO2, calcite, aragonite, Ulva lactuca (living/non-living algae) and natural suspended matter collected in the Gulf of Mexico. The study will use both synthetic solutions and natural seawater. Results from this research will provide an improved understanding of processes that exert dominant control on the distribution of reactive metals in seawater.