Black Carbon in Sediment/Soil Aggregates: Quantification and Characterization by Electron Microscopy and Impacts on the Sorption of Organic Compounds

沉积物/土壤团聚体中的黑碳：电子显微镜的定量和表征以及对有机化合物吸附的影响

• 批准号: 0607136
• 负责人: Philip Gschwend
• 金额: --
• 依托单位: Massachusetts Institute of Technology
• 依托单位国家: 美国
• 项目类别: Continuing grant
• 财政年份: 2006
• 资助国家: 美国
• 起止时间: 2006-07-01 至 2008-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0607136&HistoricalAwards=false
• 关键词: Black; Carbon; Sediment; Soil; Aggregates

0607136GschwendThis project seeks to develop electron microscopy methods to quantify black carbon (soot and char) in sediments and soils in greater detail than has been achieved previously. The PIs hypothesize that these black carbon particles often are the cause of both past overestimates of equilibrium chemical activities of hydrophobic organic contaminants (HOC) in sediments and soils and the slow transfers of HOCs between the solids and fluids/biota. This research will improve the ability of environmental managers to rationally allocate resources to clean up hazardous sites; having a more accurate means to assess HOC mobility and bioavailability in sediments and soils will improve remediation designs that require HOC mobility or bioavailability. The results of this project will be valuable to other researchers and environmental engineers developing and implementing remediation solutions and the work may result in a new risk assessment paradigm (based on kinetic models) for contaminated soils and sediments. The PIs have extensive experience with harbor sediments and have chosen relevant sediments and soils from localities where considerable information exists to facilitate their work.

0607136 Gschwend该项目旨在开发电子显微镜方法，以更详细地量化沉积物和土壤中的黑碳（烟灰和焦炭）。PI假设这些黑碳颗粒通常是过去高估沉积物和土壤中疏水有机污染物（HOC）的平衡化学活性以及HOC在固体和流体/生物群之间缓慢转移的原因。这项研究将提高环境管理人员合理分配资源以清理危险场地的能力;有一种更准确的方法来评估沉积物和土壤中HOC的流动性和生物利用度，将改善需要HOC流动性或生物利用度的修复设计。该项目的结果将是有价值的其他研究人员和环境工程师开发和实施补救解决方案和工作可能会导致一个新的风险评估范式（基于动力学模型）的污染土壤和沉积物。 PI在港口沉积物方面有着丰富的经验，并从存在大量信息的地方选择了相关的沉积物和土壤，以促进其工作。