RUI: Collaborative Research: Do CFCs and SF6 behave as reactive (sorbing) tracers in low carbon content sedimentary aquifers?

RUI：合作研究：CFC 和 SF6 在低碳含量沉积含水层中是否充当反应（吸附）示踪剂？

• 批准号: 0838414
• 负责人: Amy Sheldon
• 金额: $ 10.56万
• 依托单位: SUNY College at Geneseo
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2009
• 资助国家: 美国
• 起止时间: 2009-07-15 至 2013-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0838414&HistoricalAwards=false
• 关键词: RUI; Collaborative; Research; Do; CFCs

Collaborative Research: Do CFCs and SF6 behave as reactive (sorbing) tracers in low carbon content sedimentary aquifers?This award is funded under the American Recovery and Reinvestment Act of 2009 (Public Law 111-5). Intellectual Merit: CFCs and SF6 are environmental tracers used to date recent groundwater (up to ~50 years). Because these compounds are relatively soluble, the current paradigm expects conservative (no sorption or degradation) transport of these compounds in aerobic, low carbon content (foc) aquifers. We posit that CFCs and SF6 act as reactive (sorbing) tracers in many low foc sedimentary aquifers ? in particular those that contain thermally altered carbonaceous matter (TACM). TACM examples include char, coal and kerogen. TACM occurs commonly in sediments deposited since the Devonian. Our preliminary experiments demonstrate that CFC sorption is sufficient to significantly retard CFC transport in low foc aquifers. This project will provide the first systematic assessment of the impact of different forms of TACM on CFC and SF6 sorption. The experiments will be completed for selected low foc sediments over an unprecedented concentration range of ~9 orders of magnitude. CM will be fractionated, quantified and classified using established methods. The isotherm models and parameters deduced will be used to evaluate the conditions in which significant retardation of these solutes are expected in low foc aquifers. Broader Impacts: The proposed project will provide support for a new collaboration between Drs. Allen-King and Sheldon, faculty members at neighboring and complementary SUNY institutions: Geneseo, a primarily undergraduate institution, and Buffalo, a PhD granting institution. This project will enhance educational opportunities through direct support of four undergraduate students and one PhD student. It will provide opportunities to develop connections through student exchanges between the institutions. The PIs will invite applications from qualified students with particular attention to soliciting participation from members of underrepresented groups. Benefit to society from this project will come through improved understanding of the reactive transport of moderately hydrophobic chemicals in groundwater and improved groundwater age estimates. This project will support economic stimulus through providing well paid positions for research students and valuable training that will enhance their technical contributions as they enter the workforce.

合作研究：CFC 和 SF6 在低碳含量沉积含水层中是否充当反应性（吸附）示踪剂？该奖项由 2009 年美国复苏和再投资法案（公法 111-5）资助。智力优点：CFC 和 SF6 是环境示踪剂，用于测定近期地下水（长达约 50 年）的年代。由于这些化合物相对可溶，目前的范式预计这些化合物在需氧、低碳含量 (foc) 含水层中保守（无吸附或降解）运输。我们假设 CFC 和 SF6 在许多低焦点沉积含水层中充当反应（吸附）示踪剂？特别是那些含有热变碳质（TACM）的物质。 TACM 的例子包括木炭、煤和干酪根。 TACM 常见于泥盆纪以来沉积的沉积物中。我们的初步实验表明，CFC 吸附足以显着延迟低焦点含水层中的 CFC 传输。该项目将首次系统评估不同形式的 TACM 对 CFC 和 SF6 吸附的影响。实验将针对选定的低焦点沉积物完成，浓度范围前所未有，约为 9 个数量级。将使用既定方法对 CM 进行分级、量化和分类。推导出的等温线模型和参数将用于评估低焦点含水层中这些溶质预计会发生显着延迟的条件。更广泛的影响：拟议的项目将为博士之间的新合作提供支持。 Allen-King 和 Sheldon 是纽约州立大学附近和互补机构的教员：Geneseo（主要是本科院校）和 Buffalo（博士学位授予机构）。该项目将通过对四名本科生和一名博士生的直接支持来增加教育机会。它将提供通过机构之间的学生交流发展联系的机会。 PI 将邀请合格学生提出申请，特别注意争取代表性不足群体成员的参与。该项目将通过更好地了解地下水中中等疏水性化学物质的反应性迁移和改进地下水年龄估计而给社会带来好处。该项目将通过为研究生提供高薪职位和宝贵的培训来支持经济刺激，这些培训将提高他们进入劳动力市场时的技术贡献。