Optimization of Multi-Stage Filtration Processes for Treating AFFF-Contaminated Water

受即将出台的全氟辛烷磺酸(PFOS)和全氟辛酸法规推动 全氟辛烷磺酸(PFOA)及其相关的含氟表面活性剂，迫切需要开发性价比高、效率高的表面活性剂 从受影响的水中去除这些持久性和有毒化学物质的处理技术，特别是 被含水的成膜泡沫污染的水。因为这些表面活性剂非常稳定，而且 抵抗微生物或化学攻击，传统的生物或化学处理要么不能 有效的或非常昂贵的。一个明确、有效和经济的替代方案是使用适当的脱硫剂 捕捉这些污染物的材料。在Engage Grant的支持下，一项新的合作伙伴关系 在Sanexen和麦吉尔大学的申请人之间建立，以评估公司的商标 多步过滤工艺对AFFF处理效果和效率的影响。全部移除 在实验室规模和现场规模的处理系统中实现了90%-99%的效率。所获得的结果 在前期工作中继续推进商标流程的进一步优化。具体地说， 该项目将检查水力停留时间、胶体材料浓度和化学物质的影响 AFF的组成。持续的协作将使行业合作伙伴受益于改善其 去除AFFF的商标处理流程，并扩大其客户基础。该项目将使加拿大的 通过降低处理全氟辛烷磺酸和全氟辛烷磺酸及其相关持久性的成本来实现经济和环境 许多联邦污染场地中的有机污染物。

Driven by forthcoming regulations on perfluorooctane sulfonic acid (PFOS) and perfluorooctanoic acid (PFOA) and their related fluorinated surfactants, there is a great need to develop cost-effective and efficient treatment technologies for removing these persistent and toxic chemicals from impacted waters, especially the waters contaminated by aqueous film-forming foams (AFFF). Because these surfactants are highly stable and resistant to microbial or chemical attacks, conventional biological or chemical treatments are either not effective or are very cost prohibitive. A clear effective and economical alternative is to use appropriate sorbent materials to capture these contaminants. Supported by an Engage Grant, a new collaborative partnership was established between Sanexen and the applicant at McGill University to evaluate the company's trademark multi-step filtration process with respect to the efficacy and efficiency of the AFFF treatment. Total removal efficiencies of 90-99% have been achieved in lab-scale and field-scale treatment systems. The results obtained in the previous work warrant going forward to further optimizing the trademark process. Specifically, the project will examine the impact of hydraulic retention time, concentration of colloidal materials, and chemical compositions of AFFFs. The continuous collaboration will benefit the industrial partner in improving its trademark treatment process for AFFF removal and expanding its client base. The project will benefit Canada's economy and environment by reducing the cost of dealing with PFOS and PFOA and their related persistent organic contaminants in many federal contaminated sites.