Contamination of the water and sediment with per- and polyfluoroalkyl substances (PFAS) was studied for the lake impacted by the release of PFAS-containing aqueous film forming foam (AFFF). PFAS concentrations were analyzed in lake water and sediment core samples. ΣPFAS concentrations were in the range of 95–100 ng L⁻¹ in the lake water and 3.0–61 µg kg⁻¹ dry weight (dw) in sediment core samples, both dominated by perfluorohexane sulfonate, perfluorooctane sulfonate; 6:2 fluortelomer sulfonate was inconsistently present in water and sediment core samples. The sediment–water partitioning coefficients (log K_d) were estimated and ranged 0.6–2.3 L kg⁻¹ for individual perfluoroalkyl carboxylates (PFCAs) and 0.9–5.6 L kg⁻¹ for individual perfluoroalkane sulfonates (PFSAs). The influence of the sediment inorganic content and organic matter on PFAS distribution was investigated. In studied sediments, the mineral content (corresponding to <5% of the bulk media mass) was mainly represented by sulfur, iron and calcium. The PFAS distribution was found strongly connected to the sediment mineral content (i.e., Fe, Pb, Rb and As), whereas the sediment organic carbon content did not to have a direct influence on the PFAS distribution. The aim of this study was to improve our understanding of the PFAS distribution in the natural heterogeneous media.

中文翻译：

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沉积物中有机物和矿物质含量对沉积物中全氟和多氟烷基物质（PFAS）分布的影响。

研究了受含PFAS的水性成膜泡沫（AFFF）释放影响的湖泊中全氟和多氟烷基物质（PFAS）对水和沉积物的污染。分析了湖水和沉积物岩心样品中的PFAS浓度。在湖水中，ΣPFAS浓度在95–100 ng L ^-1范围内，在沉积物岩心样品中，ΣPFAS浓度在3.0–61 µg kg ^-1干重（dw）范围内，均以全氟己烷磺酸盐，全氟辛烷磺酸盐为主。水和沉积物岩心样品中不一致地存在6：2含氟调聚物磺酸盐。估计的沉积物-水分配系数（log K _d）范围为单个全氟烷基羧酸盐（PFCA）0.6-2.3 L kg ^-1和0.9-5.6 L kg单个全氟链烷磺酸盐（PFSA）^-1。研究了沉积物中无机物含量和有机质对PFAS分布的影响。在研究的沉积物中，矿物质含量（相当于<5％的整体介质质量）主要以硫，铁和钙为代表。PFAS的分布与沉积物中的矿物质含量（即Fe，Pb，Rb和As）密切相关，而沉积物中的有机碳含量对PFAS的分布没有直接影响。这项研究的目的是增进我们对自然异构介质中PFAS分布的理解。