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首页> 外文期刊>Environmental Science & Technology >Sorption of Fluorotelomer Sulfonates, Fluorotelomer Sulfonamido Betaines, and a Fluorotelomer Sulfonamido Amine in National Foam Aqueous Film-Forming Foam to Soil
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Sorption of Fluorotelomer Sulfonates, Fluorotelomer Sulfonamido Betaines, and a Fluorotelomer Sulfonamido Amine in National Foam Aqueous Film-Forming Foam to Soil

机译：在国家泡沫水成膜泡沫中对氟调聚物磺酸盐，氟调聚物磺酰胺甜菜碱和氟调聚物磺酰胺胺的吸附

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摘要

During fire-fighter training, equipment testing, and emergency responses with aqueous film-forming foams (AFFFs), milligrams per liter concentrations of anionic, zwitterionic, and cationic per- and polyfluoroalkyl substances (PFASs) enter the environment. Because the behavior of zwitterionic and cationic PFASs in the subsurface is unknown, batch sorption experiments were conducted using National Foam AFFF, which contains anionic fluorotelomer sulfonates (FtSs), zwitterionic fluorotelomer sulfonamido betaines (FtSaBs), and cationic 6:2 fluorotelomer sulfonamido amine (FtSaAm). Sorption of the FtSs, FtSaBs, and 6:2 FtSaAm to six soils with varying organic carbon, effective cation-exchange capacity, and anion-exchange capacity was evaluated to determine sorption mechanisms. Due to the poor recovery of the FtSaBs and 6:2 FtSaAm with published PFAS soil extraction methods, a new soil extraction method was developed to achieve good (90—100%) recoveries. The 6:2 FtSaAm was depleted from the aqueous phase in all but one soil, which is attributed to electrostatic and hydrophobic interactions. Sorption of the FtSs was driven by hydrophobic interactions, while the FtSaBs behave more like cations that strongly associate with the solid phase relative to groundwater. Thus, the sorption mechanisms of the FtSs, FtSaBs, and 6:2 FtSaAm are more complex than expected and cannot be predicted by bulk soil properties.
机译：在消防人员的培训，设备测试以及使用含水成膜泡沫（AFFF）的紧急响应过程中，毫克每升浓度的阴离子，两性离子和阳离子全氟和多氟烷基物质（PFAS）进入环境。由于两性离子和阳离子PFAS在地下的行为是未知的，因此使用National Foam AFFF进行了批量吸附实验，该泡沫包含阴离子氟代端粒磺酸盐磺酸盐（FtSs），两性离子式氟代端粒磺酰胺基甜菜碱（FtSaBs）和阳离子6：2氟代端粒磺酰胺基胺（ FtSaAm）。评估了FtSs，FtSaBs和6：2 FtSaAm在六种具有不同有机碳，有效阳离子交换容量和阴离子交换容量的土壤上的吸附能力，以确定吸附机理。由于使用已发布的PFAS土壤提取方法回收的FtSaBs和6：2 FtSaAm的回收率较差，因此开发了一种新的土壤提取方法，以实现良好的回收率（90-100％）。除一种土壤外，其他所有土壤中的6：2 FtSaAm均已从水相中耗尽，这归因于静电和疏水作用。 FtS的吸附是由疏水相互作用驱动的，而FtSaB的行为更像是阳离子，相对于地下水，其与固相密切相关。因此，FtSs，FtSaBs和6：2 FtSaAm的吸附机理比预期的更为复杂，并且无法通过整体土壤特性进行预测。

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  • 来源
    《Environmental Science & Technology》 |2017年第21期|12394-12404|共11页
  • 作者

    Krista A. Barzen-Hanson; Shannon E. Davis; Markus Kleber; Jennifer A. Field;

  • 作者单位

    Department of Chemistry, Oregon State University, 153 Gilbert Hall, Corvallis, Oregon 97331, United States;

    Department of Chemistry, Oregon State University, 153 Gilbert Hall, Corvallis, Oregon 97331, United States,School for the Environment, University of Massachusetts, Boston, 100 William T. Morrissey Boulevard, Boston, Massachusetts 02125, United States;

    Department of Crop and Soil Science, Oregon State University, 3017 ALS Building, 2750 SW Campus Way, Corvallis, Oregon 97331, United States;

    Department of Environmental and Molecular Toxicology, Oregon State University, 1007 ALS Building, 2750 SW Campus Way, Corvallis, Oregon 97331, United States;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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