Enhancing transport and delivery of ferrihydrite nanoparticles via polymer encapsulation in PFAS-contaminated sediments to simulate PFAS defluorination by Acidimicrobium sp. Strain A6

通过聚合物封装在 PFAS 污染的沉积物中增强水铁矿纳米粒子的运输和递送,以模拟 Acidimicrobium sp 的 PFAS 脱氟。

基本信息

  • 批准号:
    10515660
  • 负责人:
  • 金额:
    $ 30.56万
  • 依托单位:
  • 依托单位国家:
    美国
  • 项目类别:
  • 财政年份:
    2021
  • 资助国家:
    美国
  • 起止时间:
    2021-02-16 至 2024-10-31
  • 项目状态:
    已结题

项目摘要

Project Summary/Abstract Per- and polyfluoroalkyl substances (PFAS) are ubiquitous in the environment and highly stable. They are present in many consumer products and over 4000 different PFAS have been synthesized. Among the most common and of most concern are perfluorooctanoic acid (PFOA) and perfluoro octane sulfonate (PFOS), for which the EPA reports that these compounds can cause reproductive and developmental defects, liver and kidney damage, and immunological effects in laboratory animals, and that they may cause tumors in animal studies. Due to the strong C-F bond, no defluorination followed by mineralization of perfluorinated compounds has been reported so far, except PFAS defluorination by the recently discovered and isolated Feammox bacterium Acidimicrobium sp. Strain A6 (A6). A6 oxidizes ammonium (NH4+) while reducing ferric iron (Fe(III)), and it can during this process also transfer electrons to PFAS and defluorinate them. Bioremediation/biostimulation usually requires achieving proper biogeochemical conditions via the supply of appropriate electron donors/acceptors, redox potential manipulation, and bioaugmentation if the required organism is not present. A6 is common in iron-rich acidic soils, indicating that biostimulation could be an appropriate technology in many cases to use this organism for PFAS bioremediation schemes. Under electron donor/acceptor limiting conditions, it is easy to supply NH4+ to an aquifer, while it is challenging to supply and spatially distribute solid-phase Fe(III), requiring novel methods to enhance the transport of Fe(III) phases. We hypothesize that polymer encapsulated nano-ferrihydrite can be delivered throughout a porous medium to stimulate the activity of A6 and its defluorination of PFAS. Hence, the Aims of this project include: (1) develop polymer-encapsulated nano-ferrihydrite particles that have increased transport properties in a porous medium; (2) ascertain that the polymer-encapsulated nano-ferrihydrite is bioavailable and enhances PFAS defluorination by A6; and (3) determine via soil column experiments how to supply the polymer-encapsulated nano-ferrihydrite to enhance the A6 activity and its defluorination of PFAS. The outcome of this project will result in the first approach to design and operate a bioremediation scheme to defluorinate PFAS, which are of increasing health concern and for which drinking water is the main exposure for humans. This will be achieved by combining techniques and experimental methods from material science, microbiology, and hydrology/environmental engineering. The project will provide new knowledge on how to supply a Fe(III) source, which also has other remediation applications, provide new insights on how to stimulate A6 for the bioremediation of PFAS and other pollutants, and show how to integrate these findings for an effective PFAS bioremediation scheme that is able to operate for extended time periods in order to achieve desired final concentration/water quality goals.
项目总结/摘要 全氟烷基和多氟烷基物质(PFAS)在环境中普遍存在,并且非常稳定。他们 存在于许多消费品中,已经合成了超过4000种不同的PFAS。之间 最常见和最受关注的是全氟辛酸(PFOA)和全氟 辛烷磺酸 (全氟辛烷磺酸),美国环保署报告说,这些化合物可导致生殖和发育 缺陷,肝脏和肾脏损伤,以及实验室动物的免疫效应,它们可能 在动物实验中导致肿瘤。由于强的C-F键,没有脱矿,随后是矿化 全氟化合物的研究,除了PFAS被最近的 发现并分离出Feammox细菌Acidimicrobium sp.菌株A6(A6)。 A6氧化铵(NH 4+),同时还原三价铁(Fe(III)),并且在此过程中,它还可以 将电子转移到PFAS并将其脱氟。生物修复/生物刺激通常需要 通过提供合适的电子供体/受体获得合适的生物化学条件, 氧化还原电位操纵和生物强化(如果不存在所需的生物体)。A6是 常见于富含铁的酸性土壤,表明生物刺激可能是一种合适的技术, 许多情况下使用这种生物PFAS生物修复计划。欠电子给体/受体 限制条件下,很容易向含水层供应NH 4+,而在空间上供应NH 4+则具有挑战性。 分散固相Fe(III),需要新的方法来增强Fe(III)相的传输。我们 假设聚合物包封纳米水铁矿可以被输送通过多孔介质 刺激A6的活性,使其降解PFAS。因此,本项目的目标包括:(1) 开发聚合物包封的纳米水铁矿颗粒, (2)确定聚合物包封的纳米水铁矿是生物可利用的, 通过土柱试验确定了如何为PFAS提供 聚合物包覆纳米水铁矿提高PFAS的A6活性及其脱附效果。 该项目的成果将导致第一种设计和操作生物修复的方法 PFAS的脱氟计划,这是越来越多的健康问题,饮用水是 人类的主要暴露。这将通过技术和实验方法相结合来实现 材料科学、微生物学和水文/环境工程。该项目将提供 关于如何提供Fe(III)源的新知识,也有其他补救应用, 关于如何刺激A6对PFAS和其他污染物进行生物修复的新见解,并展示如何 将这些发现整合为一个有效的PFAS生物修复方案,该方案能够操作, 延长时间段,以实现所需的最终浓度/水质目标。

项目成果

期刊论文数量(1)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
Enhanced Feammox activity and perfluorooctanoic acid (PFOA) degradation by Acidimicrobium sp. Strain A6 using PAA-coated ferrihydrite as an electron acceptor.
  • DOI:
    10.1016/j.jhazmat.2023.132039
  • 发表时间:
    2023-07
  • 期刊:
  • 影响因子:
    13.6
  • 作者:
    Jinhee Park;Shan Huang;B. Koel;P. Jaffé
  • 通讯作者:
    Jinhee Park;Shan Huang;B. Koel;P. Jaffé
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Peter R. Jaffe其他文献

Peter R. Jaffe的其他文献

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{{ truncateString('Peter R. Jaffe', 18)}}的其他基金

Enhancing transport and delivery of ferrihydrite nanoparticles via polymer encapsulation in PFAS-contaminated sediments to simulate PFAS defluorination by Acidimicrobium sp. Strain A6
通过聚合物封装在 PFAS 污染的沉积物中增强水铁矿纳米粒子的运输和递送,以模拟 Acidimicrobium sp 的 PFAS 脱氟。
  • 批准号:
    10152929
  • 财政年份:
    2021
  • 资助金额:
    $ 30.56万
  • 项目类别:
Enhancing transport and delivery of ferrihydrite nanoparticles via polymer encapsulation in PFAS-contaminated sediments to simulate PFAS defluorination by Acidimicrobium sp. Strain A6
通过聚合物封装在 PFAS 污染的沉积物中增强水铁矿纳米粒子的运输和递送,以模拟 Acidimicrobium sp 的 PFAS 脱氟。
  • 批准号:
    10353414
  • 财政年份:
    2021
  • 资助金额:
    $ 30.56万
  • 项目类别:

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