Per- and Polyfluoroalkyl Substance (PFAS) Transport from Groundwater to Streams near a PFAS Manufacturing Facility in North Carolina, USA
Per- and Polyfluoroalkyl Substance (PFAS) Transport from Groundwater to Streams near a PFAS Manufacturing Facility in North Carolina, USA
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DOI：
10.1021/acs.est.0c07978
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发表时间：
2021-04-02
影响因子：
11.4
通讯作者：
Hopkins, Zachary R.
中科院分区：
文献类型：
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作者：
Petre, Marie-Amelie;Genereux, David P.;Hopkins, Zachary R.
我们量化了全氟烷基物质和多氟烷基物质 (PFAS) 从地下水到美国北卡罗来纳州 PFAS 制造工厂附近开普菲尔河五个支流的迁移情况。将水文数据和 PFAS 数据结合起来，量化从地下水到支流的 PFAS 通量。分析了多达 29 种 PFAS，包括全氟烷基酸和最近发现的氟代醚。地下水中 PFAS 总量 (Sigma PFAS) 定量为 20-4773 ng/L（平均值 = 1863 ng/L）；溪流水的范围为 426-3617 ng/L（平均值 = 1717 ng/L）。 8 种 PFAS 占 Sigma PFAS 的 98%；全氟-2-(全氟甲氧基)丙酸(PMPA)和六氟环氧丙烷二聚酸(GenX)占61%。对于从地下水到一条支流的 PFAS 排放，根据溪流水测量值 (18 +/- 4 千克/年) 估算的值与河床地下水测量值 (22-25 +/- 5 千克/年) 相似。在基流处，每年有 32 +/- 7 千克的 PFAS 从地下水排放到五个支流，最终到达开普菲尔河。鉴于该地点的 PFAS 排放时间表，地下水数据表明，丰富的氟醚通过地下转移到河流中
We quantified per- and polyfluoroalkyl substance (PFAS) transport from groundwater to five tributaries of the Cape Fear River near a PFAS manufacturing facility in North Carolina (USA). Hydrologic and PFAS data were coupled to quantify PFAS fluxes from groundwater to the tributaries. Up to 29 PFAS were analyzed, including perfluoroalkyl acids and recently identified fluoroethers. Total quantified PFAS (Sigma PFAS) in groundwater was 20-4773 ng/L (mean = 1863 ng/L); the range for stream water was 426-3617 ng/L (mean = 1717 ng/L). Eight PFAS constituted 98% of Sigma PFAS; perfluoro-2-(perfluoromethoxy)propanoic acid (PMPA) and hexafluoropropylene oxide dimer acid (GenX) accounted for 61%. For PFAS discharge from groundwater to one tributary, values estimated from stream water measurements (18 +/- 4 kg/yr) were similar to those from groundwater measurements in streambeds (22-25 +/- 5 kg/yr). At baseflow, 32 +/- 7 kg/yr of PFAS discharged from groundwater to the five tributaries, eventually reaching the Cape Fear River. Given the PFAS emission timeline at the site, groundwater data suggest the abundant fluoroethers moved through the subsurface to streams in