Development of high affinity novel Fluor Mop adsorbent for the rapid removal of perfluorinated chemicals from groundwater

全氟烷基物质(PFAS)，绰号“永远的化学品”，在工业上被广泛使用 以及作为水性成膜泡沫(AFF)的一种成分的消防应用。因为会员 这类化学物质是持久性的，它们在自然界中普遍存在，并在全球范围内被检测到 水、空气、土壤、植物、动物，甚至在人类的乳汁和血液中。它们对人类健康是有毒的，而且 即使水平较低，也与婴儿的发育影响、肝脏毒性、某些风险的增加有关 癌症类型、免疫系统影响、甲状腺疾病和许多其他健康问题。 因此，美国 美国环境保护局(USEPA)最近为两个PFAS设定了健康建议水平， 全氟辛酸(全氟辛酸)和全氟辛烷磺酸(全氟辛烷磺酸)单独或合并使用70 ng/L。 为了应对修复全氟辛烷磺酸污染水的需要，许多技术已经被 经过仔细审查，包括基于吸附的修复技术。最值得注意的是，颗粒的使用被激活 碳(GAC)和离子交换树脂吸附剂。其中，广汽集团是最被广泛接受和 PFAS污染地下水和饮用水的常用处理技术。然而， GAC有许多缺点，例如它对天然有机物的污染很敏感，价格昂贵 强化的高能再生工艺，对短链PFAS的去除效果较差。此外，由于 GAC不是为吸附PFAS而设计的，它对PFAS只表现出低亲和力，因此它需要 大量的GAC，以达到预期的全氟辛烷磺酸水平。因此，有必要 专为去除全氟辛烷磺酸/全氟辛烷磺酸而设计的高效、经济、 可回收的方式。 在正在进行的研究中，韦弗实验室设计了新型全氟辛烷磺酸/全氟辛烷磺酸专用吸附剂，该吸附剂利用 先进的坚实支撑平台。在初步的吸附研究中，该吸附剂表现出了优越的性能。 全氟辛烷磺酸/全氟辛烷磺酸亲和力与使用全氟辛烷磺酸/全氟辛烷磺酸污染的GAC技术的比较 地下水。Weaver Labs这个项目的长期目标是开发专门用于商业的PFAS 高效、高效、可回收、经济的吸附过滤器，可用于净化 全氟辛烷磺酸污染了水。最终，它将允许向公众提供纯净水，因此 降低与这些化学品相关的健康风险。为了实现这一建议的长期目标 目的是开发和筛选新型吸附剂，进行所需的动力学吸附研究 实验，并优化其再生和再利用。拟议研究的完成将使我们 用于第二阶段研究，包括快速小规模专栏研究和最终的试点研究。

Perfluorinated alkyl substances (PFAS), nicknamed “Forever Chemicals”, are extensively used in industries and firefighting applications as a component of aqueous film forming foams (AFFFs). Because members of this class of chemicals are persistent, they are prevalent in nature and are detected across the globe in water, air, soil, plants, animals, and even in human milk and blood. They are toxic to human health, and even at lower levels are linked to developmental effects in infants, liver toxicity, increased risk of certain types of cancer, immune system impacts, thyroid disease, and many other health issues. Therefore the U.S. Environmental Protection Agency (USEPA) has recently set health advisories level for two PFAS, perfluorooctanoic acid (PFOA) and perfluorooctane sulfonate (PFOS) at 70 ng/L individually or combined. In response to the need for remediation of PFAS contaminated water many technologies have been scrutinized, including adsorption-based remediation technology. Most notably, the use of granular activated carbon (GAC) and ion exchange resins sorbents. Among these, GAC is the most widely accepted and commonly used treatment technology for PFAS contaminated groundwater and drinking water. However, GAC has many drawbacks for example its susceptibility to fouling by natural organic matter, expensive intensive high energy regeneration process, and inferior in removal of short chain PFAS. Additionally, since GAC is not designed for PFAS adsorption it displays only low affinity towards PFAS, thus, it requires significantly large amounts of GAC to achieve the desired PFAS levels. Therefore, there is a need for adsorbents that are specifically designed for the PFOA/PFOS removal in efficient, cost-effective, and recyclable manner. In ongoing research, Weaver Labs has designed novel PFOA/PFOS specific adsorbents that leverage an advanced solid support platform. In the preliminary adsorption studies, the adsorbent demonstrated superior PFOA/PFOS affinity compared to GAC technology using PFOA/PFOS contaminated real world groundwater. Weaver labs’ long-term goal for this project is to develop commercial PFAS specific adsorbent filter that is highly efficient, effective, recyclable and economical which can be utilized to purify PFAS contaminated water. Ultimately, it would allow pure water to be delivered to the public, thus decreasing the health risk associated with these chemicals. To meet the long-term goal this proposal’s objective is to develop and screen novel adsorbents, carry out the required kinetic adsorption study experiments, and optimize its regeneration and reuse. The completion of proposed study will position us for phase II studies, including a rapid small-scale column study, and eventual pilot study.