U.S.-Korea Cooperative Research: Electrokinetic-Enhanced Bioremediation of Metal-Contaminated Soils

美国伊利诺伊大学芝加哥分校Oise 0425994 Krishna Reddy该奖项支持由Krishna Reddy教授、伊利诺伊大学芝加哥分校研究生和韩国高级科学与技术学院(KAIST)环境补救国家实验室的杨志元博士等人参与的美韩研究合作。他们建议开发一种创新的电动-生物修复技术来修复土壤中的重金属污染。韩国团队对土壤和地下水修复技术进行了广泛的研究，并在污染土壤的生物修复方面拥有专门知识。他们将结合使用电动力学作为输送系统来研究重金属的生物转化。PI在污染场地的现场修复方面拥有丰富的研究经验，特别是土壤的电动修复；他将专注于该技术的电动方面。科学价值严重的金属污染在美国和韩国的许多地点很普遍。研究的具体目标是：(1)研究重金属在土壤中的生物转化；(2)研究养分和微生物在土壤中的电动迁移；(3)通过电动增强的生物刺激和生物强化，研究土壤中重金属的生物固定。这项从土壤中去除有毒疏水有机化合物的技术的几个基本方面正在雷迪教授目前由土木工程和机械工程部提供的NSF研究支持下进行研究。CMS-0100073。这些目标将通过实验室实验来实现：(1)表征土壤中重金属的微生物转化；(2)评估不同土壤条件下养分和微生物的电动输送；(3)研究不同土壤条件下集成电动强化生物固定重金属的效率。实验结果将被用来制定设计和实施实地规模系统的指导方针，并评估处理技术的长期影响。美国和韩国研究人员的相关专业知识相结合，将有助于成功完成拟议的研究。更广泛的影响电动生物固定化在困难的地下条件下修复受污染的场地具有巨大的潜力。美国和韩国的许多地点都受到有毒重金属的污染，需要紧急清理，以保护公众健康和环境。使用自然生物过程得到了公众的广泛支持。不幸的是，大多数受污染的场地都受到污染物生物利用度和流动性差以及毒性增加的影响。拟议的研究将确定这一过程固定重金属的能力。它还建立了美国和韩国研究人员之间的新合作，并汇集了相关专业知识，以开发一种创新的危险废物场地清理技术。电动-生物综合修复技术有可能成为许多国家修复污染场地的一种简单、高效和经济的就地修复技术。作为一种现场方法，这项技术可以减少补救操作期间对现场的干扰，从而消除对周围环境和公众的污染物暴露。韩国的参与将得到韩国科学与工程基金会(KOSEF)的支持。该项目将为PI和一名美国研究生提供国际研究培训和经验。

OISE 0425994Krishna Reddy, University of Illinois at Chicago This award supports an U.S.-Korea research collaboration involving Professor Krishna Reddy and a graduate student of the University of Illinois at Chicago and Dr. Ji-Won Yang and others of the National Lab for Environmental Remediation of the Korea Advanced Institute of Science & Technology (KAIST). They propose to develop an innovative integrated electrokinetic-bioremediation technology to remediate heavy metal contamination in soils. The Korean team has conducted extensive research on soil and groundwater remediation technologies and has expertise on bioremediation of contaminated soils. They will study biological transformation of heavy metals in conjunction with the use of electrokinetics as delivery system. The PI has extensive research experience with in-situ remediation of contaminated sites and in particular with electrokinetic remediation of soils; he will focus on the electrokinetic aspects of the technology.Scientific MeritHeavy metal contamination is prevalent at numerous sites in the United States and Korea. The specific objectives of the proposed research are (1) investigate biological transformations of heavy metals in soils, (2) investigate electrokinetic transport of nutrients and microorganisms in soils, and (3) investigate biological immobilization of heavy metals in soils through electrokinetically enhanced biostimulation and bioaugmentation. Several fundamental aspects of this technology for the removal of toxic hydrophobic organic compounds from soils are being addressed under Professor Reddy's current NSF research support from the Division of Civil and Mechanical Engineering. CMS-0100073. These objectives will be accomplished by laboratory experiments: (1) to characterize microbial transformation of heavy metals in soils; (2) to assess electrokinetic delivery of nutrients and microbes under different soil conditions; and (3) to investigate efficiency of integrated electrokinetic-enhanced bio-immobilization of heavy metals in different soil conditions. The experimental results will be utilized to develop guidelines for the design and implementation of field-scale systems and to assess long-term implications of the treatment technology. The combined relevant expertise of the US and Korean researchers will facilitate successful completion of the proposed research. Broader Impacts Electrokinetic bio-immobilization has great potential to remediate contaminated sites under difficult subsurface conditions. Numerous sites in the United States and in Korea are contaminated with toxic heavy metals and they require urgent cleanup to protect public health and the environment. Employing natural biological processes is finding widespread public support. Unfortunately, most contaminated sites suffer from the poor bioavailability and mobility of contaminants, as well as increased toxicity. The proposed research will determine the ability of this process to immobilize heavy metals. It also establishes a new collaboration between US and Korean researchers and brings together the relevant expertise to develop an innovative hazardous waste site cleanup technology. Integrated electrokinetic-bioremediation technology has potential to be a simple, efficient and cost-effective in-situ technology to remediate contaminated sites in many countries. Being an in-situ method, this technology can reduce site disturbance during remedial operations, thereby eliminating contaminant exposure of the surrounding environment and the public. Korean participation will be supported by the Korean Science and Engineering Foundation (KOSEF). This project will provide international research training and experience to the PI and to a U.S. graduate student.