U.S.-China Cooperative Research: Studies of the Effects of PB Mobility on 210PB Geochronology in Aquatic Environments

该奖项支持德克萨斯农工大学的Peter Santschi、科罗拉多矿业学院的Bruce Honeyman和中国科学院地球化学研究所的万国江在铅及其同位素的循环和移动性研究方面的合作。水生栖息地受到城市和工业投放的重金属等有毒物质的威胁。铅是毒性最强的化合物之一，集中存在于湖泊和河口的沉积物中。对于这些重金属在湖泊中的循环，人们知之甚少。利用中国和美国的设施，研究人员将研究中国一些湖泊中铅在沉积物-水界面上的移动性。这项研究应有助于评估用于古矿物学研究的放射性测年技术以及毒物铅的人为影响。

This award supports collaboration between Peter Santschi, Texas A&M University, Bruce Honeyman, Colorado School of Mines, and Wan Guojiang, Institute of Geochemistry, Chinese Academy of Sciences on the study of the cycling and mobility of lead and its isotopes. Aquatic habitats are threatened by urban and industrial inputs of toxicants such as heavy metals. Lead is one of the most toxic, and is concentrated in sediments of lakes and estuaries. Little is understood about the cycling of such heavy metals in lakes. Using facilities in China and in the US, the investigators will study the mobility of lead across the sediment-water interface in some Chinese lakes. This study should contribute to the assessment of radioactive dating techniques used for paleolimnological studies and of anthropogenic effects of the toxicant lead.