Evaluating adsorption of PFAS on Liquid Activated Carbon for the remediation of contaminated sites

评估液体活性炭对 PFAS 的吸附用于修复污染场地

• 批准号: 519913-2017
• 负责人: Pham, Anh
• 金额: $ 1.82万
• 依托单位: Carleton University
• 依托单位国家: 加拿大
• 项目类别: Engage Grants Program
• 财政年份: 2017
• 资助国家: 加拿大
• 起止时间: 2017-01-01 至 2018-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=639870
• 关键词: Evaluating; adsorption; PFAS; Liquid; Activated

Per- and polyfluoroalkyl substances (PFAS) are emerging groundwater contaminants which pose widespread risks to drinking water resources in Canada, the United States, Europe, China, and Australia. PFAS compounds are relatively mobile in groundwater and are generally recalcitrant to natural and enhanced degradation processes. Currently, an effective in situapproach to remediate PFAS-contaminated sites does not exist. This project will investigate the ability of Liquid Activated Carbon (LAC) to adsorb a wide variety of PFAS compounds under conditions relevant to contaminated sites with the goal to develop an effective in situ remediation approach. LAC consists of very small particles of activated carbon (1 to 2 microns in diameter), which flow readily through pore spaces in transmissive sand zones. Upon injection into the subsurface, LAC will attach to soil grains, creating a stationary barrier zone that can adsorb PFAS compounds and remove them from the aqueous phase. In this project, we will conduct a series of adsorption experiments to investigate and compare the adsorption of each PFAS compound onto LAC, and to understand how competitive adsorption influences the fate and transport of PFAS at sites where LAC will be applied. The findings from this research will help develop and optimize LAC-based remedial systems. The research also will help our industry partner, Porewater Solutions, develop a reactive transport model capable of predicting the efficiency of LAC at remediating PFAScontaminated sites.

全氟烷基和多氟烷基物质（PFAS）是新兴的地下水污染物，对加拿大、美国、欧洲、中国和澳大利亚的饮用水资源构成广泛的风险。PFAS化合物在地下水中相对可移动，并且通常不受自然和强化降解过程的影响。目前，还没有一种有效的现场修复pfas污染场地的方法。本项目将研究液体活性炭（LAC）在与污染场地相关的条件下吸附各种PFAS化合物的能力，目的是开发一种有效的原位修复方法。LAC由非常小的活性炭颗粒（直径1到2微米）组成，它们很容易通过透射砂带的孔隙空间流动。在注入到地下后，LAC将附着在土壤颗粒上，形成一个固定的屏障区，可以吸附PFAS化合物并将其从水相中去除。在这个项目中，我们将进行一系列的吸附实验来研究和比较每种PFAS化合物在LAC上的吸附，并了解竞争吸附如何影响PFAS在LAC应用位点的命运和运输。这项研究的结果将有助于开发和优化基于lac的补救系统。这项研究还将帮助我们的行业合作伙伴Porewater Solutions开发一种反应性传输模型，该模型能够预测LAC修复pfasas污染场地的效率。