Remediation of groundwater and soil impacted by per- and poly-fluoroalkyl substances using novel modified clays

使用新型改性粘土修复受全氟烷基和多氟烷基物质影响的地下水和土壤

• 批准号: 537771-2018
• 负责人: Liu, Jinxia
• 金额: $ 7.13万
• 依托单位: McGill University
• 依托单位国家: 加拿大
• 项目类别: Collaborative Research and Development Grants
• 财政年份: 2019
• 资助国家: 加拿大
• 起止时间: 2019-01-01 至 2020-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=692600
• 关键词: Remediation; groundwater; soil; impacted; per

The use of and release of aqueous film-forming foams (AFFFs) has led to the detection of elevated levels of per- and polyfluoroalkyl surfactants (PFASs) in many federal and private facilities, such as fire-fighting training sites, fire equipment testing sites, oil refineries, etc. It is a global problem with developed countries registering some of the most polluted sites, impacting soil and water quality. Somes PFAS are persistent, bioaccumulative, and toxic. Driven by the stringent regulations on PFAS, there are urgent needs for cost-effective and efficient treatment technologies for contaminated soil and groundwater. We propose the project, in partnership with CETCO (USA) and Sanexen Environmental Services (Canada), to develop clay-based remediation technologies. We plan to evaluate the performance of the modified clay that was explicitly developed for PFAS. Using laboratory experiments, we plan to identify key environmental factors and sorbent characteristics that affect performance, elucidate the mechanisms of interactions between modified clays and PFASs of various structures and functionalities, and if necessary, suggest solutions to improve the existing commercial products. We expect that by the end of the project, we will be ready to propose and design treatment strategies for a given contaminated site and conduct field trials. We expect that new knowledge developed in the project will improve the understanding of the pros and cons of the new clay products, and potentially, to contribute to future product development. The collaboration among the three parties is geared towards developing new treatment technologies for treating a new category of soil and water pollutants, which is greatly needed for the North America market. As compared with the off-site disposal of contaminated soil, in situ treatment enabled by modified clay has the potential to significantly reduce remediation costs, which will benefit Canada and the USA by reducing the cost of dealing with PFAS contamination in a high number of contaminated sites.

在许多联邦和私人设施中，使用水性膜形成泡沫（AFFF）的使用和释放导致发现了升高和多氟烷基表面活性剂（PFASS）的水平，例如消防训练地点，消防训练站点，消防设备测试地点，炼油厂等。它是在污染的国家中遇到的全球问题。 Somes PFA具有持久性，生物蓄积和有毒。在PFA的严格规定的驱动下，迫切需要对受污染的土壤和地下水进行具有成本效益和高效的治疗技术。我们与CETCO（美国）和Sanexen Environmental Services（加拿大）合作提出了该项目，以开发基于粘土的补救技术。我们计划评估针对PFAS明确开发的改良粘土的性能。使用实验室实验，我们计划确定影响性能的关键环境因素和吸附特征，阐明修饰的粘土和各种结构和功能的PFASS之间相互作用的机制，并在必要时建议改善现有商业产品的解决方案。我们希望在项目结束时，我们将准备为给定受污染的现场提出和设计治疗策略，并进行现场试验。我们预计项目中发展的新知识将改善对新粘土产品的利弊的理解，并有可能为未来的产品开发做出贡献。这三个政党之间的合作旨在开发新的治疗技术来治疗新的土壤和水污染物，这对于北美市场非常需要。与现场处置受污染的土壤的处置相比，改良的粘土实现的原位治疗有可能大大降低补救成本，这将通过减少在大量受污染的地点中降低处理PFA污染的成本来使加拿大和美国受益。