Understanding the Migration Fates of Contaminants at Water/sediment Interface after Environmental Shocks Using Innovative Real-time in situ Profiling

使用创新的实时原位分析了解环境冲击后水/沉积物界面污染物的迁移命运

• 批准号: 1336425
• 负责人: Baikun Li
• 金额: $ 30万
• 依托单位: University of Connecticut
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2013
• 资助国家: 美国
• 起止时间: 2013-09-01 至 2017-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1336425&HistoricalAwards=false
• 关键词: Understanding; Migration; Fates; Contaminants; Water

CBET 1336425Baikun LiUniversity of ConnecticutThe study aims at developing a new generation microelectrode (ME) with easy fabrication, sturdy structure, simple setup and capability of simultaneously measuring multiple parameters at multiple points to profile the spatial distribution of contaminants, thus providing useful information to elucidate their fate. All-in-one microelectrode chips (AIO MECs) provide real-time, continuous, and accurate monitoring of physical-chemical variation following system shocks. With the water/sediment interface as the target, four tasks will be conducted. First, as the precursor of the AIO MECs, one-dimension MECs (1D MECs) will be fabricated using photolithography to produce sturdy MEs on silicon chips. The position of each ME will be known so that the 1D MECs are capable of profiling along the depth of samples without the need of micromanipulators. Second, AIO MECs will be developed by patterning multiple 1D MECs onto a single chip, so that one chip can simultaneously measure multiple parameters at multiple points. Third, the applicability of 1D MECs and AIO MECs will be examined under two shocks (concentration- and flow rate-dependent shocks) in lab-scale tests and lake sediments. Finally, the short-term (days) and long-term (months) impacts of shocks at the water/sediment interface will be monitored in real-time mode. The MEC profiles will be integrated with models to elucidate the migration fates of contaminants, which will provide timely restoration protocols for site cleanup before irreversible deterioration of the natural environment. This proof-of-concept work will provide real-time monitoring of physical-chemical variations (e.g., nitrogen, phosphorous, redox potential, and proton) after shocks, and allow fundamental understanding of the dynamic transport of contaminants. By developing the new generation ME technology to achieve real-time monitoring of contaminants after shocks, the proposed research will impact protection and restoration of vital ecosystems, maintaining environmental sustainability for future generations. The AIO MECs will lead to compact and simple monitoring kits that will revolutionize real-time monitor of diverse systems including large-scale contaminated sites and harsh environment (deep sea sediment). Multiple outreach initiatives including workshops and high school seminars will promote the scientific/engineering competence of underrepresented groups. The research will strengthen an existing collaboration with water industries to achieve real-time in situ monitoring of natural and engineered systems. Finally, the new generation ME technology for profiling water qualities and contaminants will be a strong force to promote environmental engineering research and education in the State of Connecticut and New England area.

CBET 1336425Baikun liuniversity的研究旨在开发新一代的微电极（ME），具有易于制造，坚固的结构，简单的设置，简单的设置和同时测量多个参数的能力，以配置多个点的多个参数，以介绍污染物的空间分布，从而提供有用的信息来提供其效率。 在系统冲击后，多合一的微电极芯片（AIO MEC）可实时，连续且准确地监测物理化学变化。将水/沉积物界面作为目标，将进行四个任务。首先，作为AIO MEC的前体，将使用光刻志制造一维MEC（1D MEC），以在硅芯片上产生坚固的MES。每个我的位置都将是知道的，以便1D MEC能够沿着样品深度进行分析，而无需微观手持。其次，将通过将多个1D MEC模式化到单个芯片上来开发AIO MEC，以便一个芯片可以同时测量多个点的多个参数。第三，将在实验室规模测试和湖泊沉积物中检查1D MEC和AIO MEC的适用性。最后，将在实时模式下监测水/沉积物界面上的冲击的短期（天）和长期（月份）影响。 MEC概况将与模型集成，以阐明污染物的迁移命运，该污染物将在不可逆的自然环境恶化之前提供及时的恢复协议，以进行现场清理。概念验证的工作将提供对震动后物理化学变化（例如氮，磷，氧化还原电位和质子）的实时监测，并允许对污染物的动态运输的基本了解。通过开发新一代ME技术以实现冲击后污染物的实时监测，拟议的研究将影响重要的生态系统的保护和恢复，从而维持子孙后代的环境可持续性。 AIO MEC将导致紧凑而简单的监视套件，这些套件将彻底改变各种系统的实时监控，包括大规模污染的地点和严酷的环境（深海沉积物）。包括研讨会和高中研讨会在内的多项外展计划将促进代表性不足的团体的科学/工程能力。这项研究将加强与水行业的现有合作，以实现对自然和工程系统的实时监控。最后，新一代的ME技术用于分析水品质和污染物将是促进康涅狄格州和新英格兰地区环境工程研究和教育的强大力量。