SGER: Refractory Organic Matter In Sediments Isolated From The Bay of Bengal

从恒河-雅鲁藏布江分离的沉积物样品由大量的难降解有机物组成。研究表明，CA。在用重铬酸钾和硫酸氧化400小时后，总有机碳（OC）的20%至60%残留。在操作中，这种残留物被称为黑碳（BC）。然而，操作定义如BC、石墨BC和油母质包括广泛的碳功能性。利用这一探索性研究小额赠款的资金，宾厄姆顿大学的一名调查员将参加即将进行的一次巡航，以分离2006年季风季节后期排入孟加拉湾的悬浮和表层沉积物。这次巡航定于2006年7月27日至8月15日进行，将提供一个独特的机会，在高流量期间捕捉从恒河-布拉马普特拉河系统排入孟加拉湾的沉积物的脉搏。每个样品中不稳定碳池的化学组成将通过对样品进行水解热解来解决。利用水解热解来阐明不稳定和难降解有机碳库的组成将是一个特别新颖和探索性的冒险。分离和分析孟加拉湾的沉积物，并将水解热解特征与PI先前分离的下游河流沉积物进行比较，将提供有关海洋碳储存基本机制的重要信息。就更广泛的影响而言，该项目将涉及首席研究员，其他美国科学家，以及他们的印度和孟加拉同事。这种国际合作将使印度和孟加拉国的科学家接触到最先进的分析技术，并在今后几年促进富有成果的科学信息交流。

ABSTRACTOCE-0630614Sediment samples isolated from the Ganges-Brahmaputra are comprised of a tremendous amount of refractory organic matter. Studies have shown that ca. 20% to 60% of the total organic carbon (OC) remains after a 400 hour oxidation with potassium dichromate and sulfuric acid. Operationally, this residue is known as black carbon (BC). However, operational definitions such as BC, graphitic BC, and kerogen comprise a broad range of carbon functionality.With funds from this Small Grant for Exploratory Research, an investigator at Binghamton University will participate in an upcoming cruise to isolate suspended and surface sediments discharged into the Bay of Bengal during the latter part of the monsoon season in 2006. The cruise, set for July 27 to August 15, 2006, will present a unique opportunity to catch the pulse of sediments discharged from the Ganges-Brahmaputra River system into the Bay of Bengal during high flow. The chemical composition of the labile pool of carbon in each sample will be addressed by subjecting the sample to hydrolytic pyrolysis. Using hydrolytic pyrolysis to elucidate the composition of labile and refractory pools of organic carbon will be a particularly novel and exploratory venture. Isolating and analyzing sediments from the Bay of Bengal and comparing the hydrolytic pyrolysis signatures to that of sediments in the lower river previously isolated by the PI will provide important information about the fundamental mechanism(s) responsible for ocean carbon storage.In terms of broader impacts, this project will involve multiple research collaborations between the principal investigator, other US scientists, and their Indian and Bangladeshi colleagues. Such international collaborations will expose Indian and Bangladeshi scientists to state-of-the art analytical techniques and promote a fruitful exchange of scientific information in future years.