Chromium Remediation and Recovery Using Microbial Fuel Cell Technology

使用微生物燃料电池技术进行铬修复和回收

• 批准号: 0826198
• 负责人: Kenneth Nealson
• 金额: $ 31.65万
• 依托单位: University of Southern California
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2008
• 资助国家: 美国
• 起止时间: 2008-09-01 至 2011-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0826198&HistoricalAwards=false
• 关键词: Chromium; Remediation; Recovery; Using; Microbial

CBET- 0826198NealsonThis proposal involves the application of microbial fuel cell (MFC) technology for the removal of chromium (Cr), a carcinogenic metal commonly found in the soils and aquifers of polluted locations, such as brownfield or Superfund sites. The proposed approach has unique advantages over the existing treatment techniques it would capitalize on the metal reducing capabilities of Shewanella in the cathode compartment of a MFC to remove the soluble and mobile Cr (VI) species through reductive precipitation while providing supplemental electrical energy to the system. Preliminary studies in the PI's lab have demonstrated the ability of prototype systems to effectively reduce and remove hexavalent chromium species from solution. The proposal will develop a microbial fuel cell to use organisms capable of reducing hexavalent chromium to form an insoluble precipitate within the cathode compartment. The research will result in a greater understanding of the metal reducing ability and biological pathways in metal reducing bacteria for hexavalent chromium species. The results of this study may be also extended to other pollutants. Until now, the focus of applied MFC technology has been wastewater treatment by microbial consortia in the anodic compartment. Application of MFCs to heavy metal remediation will yield new avenues of research with respect to fuel cell biocathodes and MFC modeling. This research will result in a greater understanding of the metal reducing ability and biological pathways found in metal reducing bacteria (MRB). Members of the Shewanella genus will be used as our model organisms because the genomes of strains to be utilized have already been sequenced. This will be of great importance in future genomic and proteomic studies; discoveries regarding metal reduction pathways and functionality can be extended to other MRB species and communities. The results of this study may be also extended to other pollutants such as arsenic, uranium, and technetium. Development of the proposed MFC technology will provide highly beneficial and desirable interdisciplinary collaboration focusing on protecting the environment and public health. In addition to being an effective tool for metal remediation and recovery, the development of the MFC system as proposed would be an exciting educational tool for both general audiences and students of multiple disciplines

CBET-0826198 Nealson该提案涉及应用微生物燃料电池（MFC）技术去除铬（Cr），铬是一种致癌金属，通常存在于污染地点的土壤和含水层中，如布朗菲尔德或超级基金地点。所提出的方法与现有的处理技术相比具有独特的优势，它将利用希瓦氏菌在MFC的阴极室中的金属还原能力，通过还原沉淀去除可溶性和移动的Cr（VI）物质，同时为系统提供补充电能。 PI实验室的初步研究已经证明了原型系统有效减少和去除溶液中六价铬物质的能力。该提案将开发一种微生物燃料电池，利用能够还原六价铬的生物体在阴极室中形成不溶性沉淀物。该研究将导致更好地了解金属还原能力和生物途径的金属还原细菌的六价铬物种。这项研究的结果也可以推广到其他污染物。 到目前为止，应用MFC技术的焦点一直是在阳极室中通过微生物聚生体处理废水。MFC在重金属污染治理中的应用将为燃料电池生物阴极和MFC建模提供新的研究途径。这项研究将导致更好地了解金属还原细菌（MRB）中的金属还原能力和生物途径。希瓦氏菌属的成员将被用作我们的模式生物，因为要使用的菌株的基因组已经测序。这将是非常重要的，在未来的基因组和蛋白质组学研究;发现有关金属还原途径和功能可以扩展到其他MRB物种和社区。这项研究的结果也可能扩展到其他污染物，如砷，铀和锝。建议MFC技术的发展将提供非常有益和可取的跨学科合作，重点是保护环境和公众健康。除了作为金属补救和回收的有效工具之外，所提议的MFC系统的开发对于普通观众和多学科学生来说将是一个令人兴奋的教育工具