Next-generation sulfidated zerovalent iron nanoparticles for groundwater remediation: degradation of emerging and legacy halogenated pollutants and interactions with bacteria

用于地下水修复的下一代硫化零价铁纳米粒子：新兴和遗留卤化污染物的降解以及与细菌的相互作用

• 批准号: RGPIN-2021-03412
• 负责人: Ghoshal, Subhasis
• 金额: $ 4.99万
• 依托单位: McGill University
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2021
• 资助国家: 加拿大
• 起止时间: 2021-01-01 至 2022-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=742531
• 关键词: Next; generation; sulfidated; zerovalent; iron

Water is a critical resource for global health and economic development and its global scarcity is exacerbated by increasing pollution. A significant number of aquifers and water sources are contaminated by many halogenated organic chemicals known to be toxic to humans or that are only now being linked to a wide range of human health issues including cancer, neurological disorders and endocrine disruption. Eliminating these chemicals from water is challenging because of their high stability and persistence, and technological advances are needed to enable or improve their elimination in contaminated water sources. The proposed research program will develop cost-effective and safe nanoparticles, made of earth-abundant elements such as iron, sulfur and carbon, for efficient in situ treatment of a variety of toxic halogenated organic chemicals in our water sources. The judicious assembly of atoms and molecules comprised of these elements into nanoparticles can yield highly reactive treatment agents whose performance surpasses those enabled by conventional agents. Current nanoparticles are either not sufficiently reactive in the actual environment or have toxic elements which render their direct use in our aquifers and water sources impossible. The research to be conducted is original and innovative because it will (i) develop safe iron-sulfur-carbon composite nanoparticles that are strategically designed to be very reactive in polluted environments; (ii) tune the design and composition of the nanoparticles to be reactive to a broad spectrum of toxic halogenated chemicals; (iii) identify strategies for the nanoparticles to act synergistically with pollutant-degrading bacteria to enable efficient and sustainable clean-up of polluted waters. The research program will provide high quality training for 1 postdoc, 4 PhD, 3 MSc and 5 undergraduate students. They will develop novel nanomaterials, use cutting-edge tools to generate new knowledge of how their composition can provide high reactivity, high stability when deployed in the environment, and high synergism with pollutant-degrading bacteria. The research will enable us to meet increasingly stringent regulatory limits for toxic halogenated chemicals for protection of human health and the environment. The research results will be directly transferred to research partners from industry and government, and to the larger community through publications and conferences, ensuring environmental, social and economic benefits to Canada.

水是全球卫生和经济发展的关键资源，通过增加污染，其全球稀缺性加剧了。许多已知对人有毒的卤代有机化学物质污染了许多含水层和水源，或者仅与癌症，神经系统疾病和内分泌干扰在内的广泛人类健康问题有关。由于它们的稳定性和持久性高，因此从水中消除这些化学物质是具有挑战性的，并且需要技术进步来实现或改善其在受污染的水源中的消除。拟议的研究计划将开发具有成本效益且安全的纳米颗粒，这些纳米颗粒由诸如铁，硫和碳等地的元素制成，以便在我们的水源中有效地处理各种有毒的卤水有机化学物质。由这些元素组成的纳米颗粒的原子和分子的明智的组装可以产生高反应性治疗剂，其性能超过了传统剂的功能。当前的纳米颗粒在实际环境中不能充分反应，或者具有使其在我们的含水层和水源中直接使用的有毒元素。进行的研究是原始的和创新的，因为它将（i）开发安全的铁硫 - 碳复合纳米颗粒，这些纳米颗粒在策略上设计为在受污染的环境中具有反应性； （ii）调整纳米颗粒的设计和组成，以使毒性卤化化学物质具有反应性； （iii）确定纳米颗粒与降解细菌协同作用的策略，以实现污染水的有效和可持续的污染。该研究计划将为1个博士后，4博士学位，3个MSC和5名本科生提供高质量的培训。他们将开发新型的纳米材料，使用尖端工具来产生新的知识，了解其组成如何提供高反应性，在环境中部署时高稳定性以及与降解细菌的高度协同作用。这项研究将使我们能够达到越来越严格的有毒卤化化学物质的监管限制，以保护人类健康和环境。研究结果将直接转移到工业和政府的研究伙伴，以及通过出版物和会议上的大型社区，确保对加拿大的环境，社会和经济利益。