CAREER: Innovative Soil Remediation Methodologies - CAREER Development

职业：创新土壤修复方法 - 职业发展

• 批准号: 0093752
• 负责人: Akram Alshawabkeh
• 金额: $ 37.5万
• 依托单位: Northeastern University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2001
• 资助国家: 美国
• 起止时间: 2001-03-01 至 2007-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0093752&HistoricalAwards=false
• 关键词: CAREER; Innovative; Soil; Remediation; Methodologies

This action is taken within the NSF Faculty Early Career Development (CAREER) Program NSF 00-89, to support a research/education career plan in geoenvironmental engineering, with emphasis on innovative soil remediation. The research component investigates the use of electroosmosis for transport of oxygen (produced by electrolysis) into fine-grained soils in order to stimulate in situ bioremediation of trapped organic contaminants. The educational component integrates the technical tasks of the project into the broader aspects of teaching in geoenvironmental engineering so as to reach students at different levels.Oxygen delivery is generally the limiting factor for in situ bioremediation due to low soil permeabilities and preferential flow paths. The use of electric currents is being investigated to overcome oxygen injection problems. Application of a direct current (dc) results in controlled oxygen production by water electrolysis at the anode. Electroosmotic flow then delivers oxygenated water into contaminated silt and clay layers to stimulate bioremediation of trapped organic contaminants. This process is complex and involves as-yet-undetermined hydrogeological, electrochemical and biogeochemical interactions, such as microbial behavior under electric fields. The research focuses on (a) rates of oxygen production and transport in fine-grained soils by dc electric fields, (b) impact of electric fields on microbial growth and transport in porous media, (c) stimulating in situ degradation of organic contaminants in fine-grained soils by electrochemical production/transport of oxygen, and (d) enhancing degradation in heterogeneous soils.The goal of the education component is to incorporate the findings of this project in a new undergraduate geoenvironmental engineering course being developed by the Principal Investigator. Undergraduate students will participate in the research through the Northeastern University Cooperative (Co-op) education program. The PI will also reach out to high school students by developing an educational CD-ROM that will (a) demonstrate the link between the basic sciences and engineering applications (geotechnical and environmental engineering in particular) and (b) attempt to promote civil and environmental engineering as exciting fields of study and practice. The PI will also partner with CONNECTIONS, a NSF funded project that is designed to help women transition into careers in science, engineering, and math (SEM). The PI will provide opportunities for high school girls, girl scouts and undergraduate women, sponsored by CONNECTIONS, to learn about geotechnical and environmental engineering, evaluate the educational CD-ROM, and participate in the research and educational tasks of this project. Graduate students will participate in the research and gain an excellent experience in cutting-edge, practice-oriented geoenvironmental research. A final goal is to further the PI's development as an educator by adopting innovative teaching and assessment techniques. A WEB site will be developed and continuously updated to present the research and educational components of this project.

这一行动是在NSF教师早期职业发展（CAREER）计划NSF 00-89中采取的，以支持地质环境工程的研究/教育职业计划，重点是创新的土壤修复。 研究部分调查了利用电渗将氧气（电解产生的）输送到细粒土壤中，以刺激对截留的有机污染物进行就地生物修复。 教育部分将该项目的技术任务纳入地质环境工程教学的更广泛方面，以覆盖不同层次的学生。由于土壤渗透性低和优先流动路径，氧气输送通常是原位生物修复的限制因素。 正在研究使用电流来克服氧气注入问题。 直流电（dc）的应用导致在阳极处通过水电解的受控氧气生产。 电渗流然后将充氧水输送到受污染的淤泥和粘土层中，以刺激被困有机污染物的生物修复。 这一过程是复杂的，涉及尚未确定的水文地质，电化学和生物地球化学的相互作用，如电场下的微生物行为。 研究重点是：（a）直流电场作用下细粒土壤中氧气的产生和运输速率，（B）电场对多孔介质中微生物生长和运输的影响，（c）通过电化学产生/运输氧气来刺激细粒土壤中有机污染物的原位降解，以及（d）教育部分的目标是将该项目的研究结果纳入校长正在开发的新的本科生地质环境工程课程。调查员 本科生将通过东北大学合作（Co-op）教育计划参与研究。 PI还将通过开发一个教育光盘来接触高中学生，该光盘将（a）展示基础科学与工程应用（特别是岩土工程和环境工程）之间的联系，（B）试图将土木工程和环境工程作为令人兴奋的研究和实践领域加以推广。 PI还将与NSF资助的项目CONNECTIONS合作，该项目旨在帮助女性过渡到科学，工程和数学（SEM）领域。 PI将为高中女生、女童子军和女大学生提供机会，由CONNECTIONS赞助，学习岩土工程和环境工程，评估教育光盘，并参与该项目的研究和教育任务。 研究生将参与研究，并获得尖端的，以实践为导向的地质环境研究的优秀经验。 最终目标是通过采用创新的教学和评估技术来促进PI作为教育者的发展。 将开发一个网站，并不断更新，以介绍该项目的研究和教育内容。