US-France Cooperative Research: Particle Dynamics and Biogeochemistry of Trace Elements in Natural Waters

该奖项将支持生物学领域的合作研究。 马萨诸塞州研究所的Francois Morel博士 技术和博士让-玛丽马丁，巴黎高等师范学校， 法国，巴黎。 本项目的目标是研究 胶体的性质、动力学、金属结合和地球化学作用 以及天然沃茨中的微粒。 美国和法国的研究小组有几个共同的长期研究 目的：1）表征水生颗粒（包括胶体） 及其动力学2）表征和建模的结合， 金属颗粒和胶体和3）量化;和模型 溶液/颗粒交换在地球化学中的作用， 天然沃茨微量元素地球生物学。 在这个项目中 合作者将专注于1）荧光的发展 光谱技术用于表征水生生物 粒子和胶体; 2）热力学的发展 金属结合的模型，经过验证，并与新的具体约束 量热、动力学和光谱数据。 该项目将 受益于美国研究者的互补专业知识， 大颗粒和地球化学以及法国的经验 胶体和物理化学机制。 因为微粒 胶体是天然微量元素的主要载体， 沃茨，阐明其动态是必不可少的， 了解微量元素的地球化学， 自然的和人为的。

This award will support collaborative research in biological oceanography between Dr. Francois Morel, Massachusetts Institute of Technology and Dr. Jean-Marie Martin, Ecole Normale Superieure, Paris, France. The objective of this project is to study the nature, dynamics, metal binding and geochemical role of colloids and microparticles in natural waters. The US and French groups have several common long term research aims: 1) to characterize aquatic particles (including colloids) and their dynamics 2) to characterize and model the binding of metals to particles and colloids and 3) to quantify; and model the role of solution/particle exchanges in the geochemistry and geobiology of trace elements in natural waters. In this project the collaborators will focus on 1) the development of fluorescence spectroscopy techniques for the characterization of aquatic particles and colloids and 2) the development of thermodynamic models of metal binding, validated and contrained with new specific calorimetric, kinetic and spectroscopic data. The project will benefit from the complementary expertise of the US investigator in large particles and geochemistry and the experience of the French in colloids and physicochemical mechanisms. Because microparticles and colloids have major carriers of trace elements in natural waters, an elucidation of their dynamics is essential to an understanding of the biogeochemistry of trace elements, both natural and anthropogenic.