<br>哨兵物种欧亚水獭 (Lutra lutra) 揭示了 PTFE 生产现场 PFOA 污染的持续存在以及英国淡水中 PFAS 替代品的出现,Environmental Science & Technology

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哨兵物种欧亚水獭 (Lutra lutra) 揭示了 PTFE 生产现场 PFOA 污染的持续存在以及英国淡水中 PFAS 替代品的出现
Environmental Science & Technology ( IF 10.8 ) Pub Date : 2024-05-27 , DOI: 10.1021/acs.est.3c09405
Emily O'Rourke ₁ , Sara Losada ₂ , Jonathan L Barber ₂ , Graham Scholey ₃ , Isobel Bain ₃ , M Glória Pereira ₄ , Frank Hailer ₁ , Elizabeth A Chadwick ₁

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在 20 只欧亚水獭体内测定了 33 种 PFAS 的浓度，这些样本是 2015 年至 2019 年沿远离一家工厂（该工厂在 PTFE 制造中使用 PFOA）的横断面采样的。尽管 2012 年停止使用，工厂附近的 PFOA 浓度仍然很高（>298 μg/kg ww <20 id=8>150 公里外）。长链传统 PFAS 在 Σ ₃₃ PFAS 分布中占主导地位，特别是 PFOS、PFOA、PFDA 和 PFNA。在 ≥19 只水獭中检测到替代化合物 PFECHS、F-53B、PFBSA、PFBS、PFHpA 和 8:2 FTS，这是该物种中 PFBSA 和 PFECHS 的首次报告。替代 PFAS 的浓度通常低于传统化合物（最大值：分别为 70.3 μg/kg ww 和 4,640 μg/kg ww）。我们的研究强调了水獭作为评估缓解成功的哨兵的效用，并强调了持续监测的价值，以深入了解与历史来源的空间关联的寿命。与传统 PFAS 相比，替代品的浓度较低，可能反映了其较低的生物累积潜力，并且是最近引入的。如果不加以控制，持续使用 PFAS 将不可避免地导致环境和人类接触量增加。需要对替代化合物的归宿、毒性和生物蓄积性进行进一步研究。

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Persistence of PFOA Pollution at a PTFE Production Site and Occurrence of Replacement PFASs in English Freshwaters Revealed by Sentinel Species, the Eurasian Otter (Lutra lutra)

Concentrations of 33 PFASs were determined in 20 Eurasian otters, sampled 2015–2019, along a transect away from a factory, which used PFOA in PTFE manufacture. Despite cessation of usage in 2012, PFOA concentrations remained high near the factory (>298 μg/kg ww <20 km from factory) and declined with increasing distance (<57 μg/kg ww >150 km away). Long-chain legacy PFASs dominated the Σ₃₃PFAS profile, particularly PFOS, PFOA, PFDA, and PFNA. Replacement compounds, PFECHS, F-53B, PFBSA, PFBS, PFHpA, and 8:2 FTS, were detected in ≥19 otters, this being the first report of PFBSA and PFECHS in the species. Concentrations of replacement PFASs were generally lower than legacy compounds (max: 70.3 μg/kg ww and 4,640 μg/kg ww, respectively). Our study underscores the utility of otters as sentinels for evaluating mitigation success and highlights the value of continued monitoring to provide insights into the longevity of spatial associations with historic sources. Lower concentrations of replacement, than legacy, PFASs likely reflect their lower bioaccumulation potential, and more recent introduction. Continued PFAS use will inevitably lead to increased environmental and human exposure if not controlled. Further research is needed on fate, toxicity, and bioaccumulation of replacement compounds.

更新日期：2024-05-27

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