Remediation of Per- and Polyfluoroalkyl Substances using Colloidal Activated Carbon

该项目将开发一种创新的就地技术，用于修复加拿大各地被全氟烷基和多氟烷基物质污染的场地。PFAS用于各种工业和商业产品，包括粘合剂、化妆品、清洁产品、水性成膜泡沫，以及织物、纸张和家具的耐水、耐污和耐油涂料。两种最常见的全氟辛烷磺酸（PFOS）和全氟辛酸（PFOA）是新出现的地下水污染物，对加拿大和世界上许多国家的饮用水资源构成广泛的风险。虽然在地下水中通常还检测到其他PFAS，但目前的补救工作主要集中在全氟辛烷磺酸和全氟辛酸。由于它们的毒性，一些地区已经建立了低万亿分之一水平的清理标准，或预计在不久的将来建立。在本项目中，我们将研究基于胶体活性炭（CAC）的PFAS原位修复。CAC由微米大小的活性炭颗粒组成，这些活性炭颗粒可以注入地下，形成一个固定的屏障区，可以吸附PFAS化合物并将其从地下水中移除。这项研究的结果将是一种有效和强大的原位技术，用于修复加拿大和世界各地的pfas污染场地。这将为合作的行业伙伴在PFAS修复的新兴市场提供实质性的优势。该项目还将培训14名环境工程和地下水修复技能方面的高素质人员。

This project will develop an innovative in situ technology for the remediation of sites contaminatedwith per- and polyfluoroalkyl substances (PFAS) across Canada. PFAS are used in a variety of industrial and commercial products, including adhesives, cosmetics, cleaning products, aqueous film-forming foams, as well as water-, stain-, and oil-resistant coatings for fabrics, paper, and furniture. The two most common PFAS, perfluorooctane sulfonic acid (PFOS) and perfluorooctanoic acid (PFOA), are emerging groundwater contaminants and pose widespread risks to drinking water resources in Canada and many countries worldwide. Although there are other PFAS typically detected in groundwater, current remediation efforts focus mostly on PFOS and PFOA. Due to their toxicity, cleanup criteria at the low part per trillion levels have been established in some regions, or are expected to be established in the near future.In this project, we will investigate the remediation of PFAS in situ based on Colloidal Activated Carbon (CAC). CAC consists of micron-sized particles of activated carbon that can be injected into the subsurface to create a stationary barrier zone that can adsorb PFAS compounds and remove them from the groundwater in situ. The outcome of this research will be an effective and robust in situ technology for the remediation of PFAS-contaminated sites in Canada and around the world. This will provide the collaborating industry partners with a substantial advantage in the emerging market for PFAS remediation. The project will also train fourteen highly qualified personnel in skills in environmental engineering and groundwater remediation.