International Planning Visit: Investigating the Interactions Between Dissolved Organic Matter, Microbial Communities, and Arsenic Biogeochemistry in Groundwater of a Pristine Delt

国际规划访问：调查原始三角洲地下水中溶解有机物、微生物群落和砷生物地球化学之间的相互作用

• 批准号: 1237290
• 负责人: Natalie Mladenov
• 金额: $ 1.27万
• 依托单位: Kansas State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2011
• 资助国家: 美国
• 起止时间: 2011-12-26 至 2013-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1237290&HistoricalAwards=false
• 关键词: International; Planning; Visit; Investigating; Interactions

This planning visit will develop an international collaborative research and training project on the topic of interactions between dissolved organic matter, microbial communities, and arsenic biogeochemistry in groundwater of the Okavango Delta, Botswana. The planning visit will bring together U.S. scientists and engineers from the University of Colorado and Kansas State University with scientists from the Botswana Geologic Survey and the Okavango Research Institute (ORI) to develop a compelling research plan, collect samples for preliminary analyses, and meet with science teachers from Maun Senior Secondary School to plan future educational outreach activities for U.S. K-12 teachers. The research team will also examine the laboratory facilities at ORI, identify field research sites, identify appropriate in-country mentors for graduate students involved in the research, and begin preparation of a research proposal targeted for the NSF EAR Hydrologic Sciences (HS) division. Intellectual merit: Naturally-occurring arsenic in groundwater is a global problem with serious health consequences for millions of people worldwide, yet the processes by which arsenic is mobilized from sediments are not well understood. This planning visit will coordinate future research to develop a process-level understanding of the reactions between organic matter and microorganisms in metal oxide-rich sediments that influence arsenic mobilization in groundwater. The improved understanding of dissolved organic material transformations along groundwater flow paths and flow path-related shifts in microbial community composition is extremely important for understanding (and predicting) arsenic mobilization in diverse groundwater environments. The evapotranspiration-driven groundwater flow that is characteristic of islands in the Okavango Delta provides a unique opportunity to investigate questions related to the evolution of microbial communities and associated biogeochemical processes that lead to arsenic mobilization. Broader impacts: In addition to broadening the understanding of the scientific community understanding on the global problem of groundwater arsenic contamination, this planning visit will support two graduate students, who will have the opportunity to be involved in the project from its conception. Meetings between US scientists and teachers at Maun Senior Secondary School will build new relationships that are the basis for future educational outreach in the form of Research Experience for Teachers and Research Experience for Undergraduates.

这次计划访问将在博茨瓦纳Okavango Delta的地下水中开发有关解散有机物，微生物社区和砷生物地球化学之间相互作用的主题的国际合作研究和培训项目。计划访问将召集科罗拉多大学和堪萨斯州立大学的美国科学家和工程师与博茨瓦纳地质调查局和奥卡万戈研究研究所（ORI）的科学家制定引人入胜的研究计划，为初级分析收集样本，以进行初步分析，并与Maun Spiordary Seniorpary Senifor Schools froce Idecational Schools for Idecational Partion Partion Partion Pacitionalitiation for Useach Auterach Active for U.S. K-12老师。研究小组还将检查ORI的实验室设施，确定现场研究地点，为参与研究的研究生确定适当的国内导师，并开始准备针对NSF EAR水文科学（HS）部门的研究建议。知识分子的优点：地下水中自然存在的砷是一个全球问题，对全球数百万人的健康后果造成了严重的健康后果，但是从沉积物中动员砷的过程却尚不清楚。这次计划访问将协调未来的研究，以对有机物物质和微生物之间的反应有了过程级别的理解，这些反应会影响地下水中砷动员的富含氧化物的沉积物。对微生物群落组成中溶解的有机材料转化的了解对理解（和预测）在不同地下水环境中的砷动员非常重要。奥卡万戈三角洲岛屿特征的蒸散驱动的地下水流提供了一个独特的机会，可以调查与微生物群落和相关的生物地球化学过程相关的问题，这些问题导致砷动员。更广泛的影响：除了扩大对科学界对地下水砷污染全球问题的理解的理解外，这次计划访问还将支持两名研究生，他们将有机会从其概念中参与该项目。美国科学家和妈妈高中的教师之间的会议将建立新的关系，这是以教师的研究经验的形式和本科生的研究经验的形式的未来教育宣传的基础。