Perfluoroalkyl Substances in the Western Tropical Atlantic Ocean,Environmental Science & Technology

当前位置： X-MOL 学术 › Environ. Sci. Technol. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Perfluoroalkyl Substances in the Western Tropical Atlantic Ocean
Environmental Science & Technology ( IF 10.8 ) Pub Date : 2021-10-07 , DOI: 10.1021/acs.est.1c01794
Daniele de A Miranda _{1,

2} , Juliana Leonel ₃ , Jonathan P Benskin ₂ , Jana Johansson ₂ , Vanessa Hatje ₁

Affiliation

The dispersion of perfluoroalkyl substances (PFAS) in surface and deep-water profiles (down to 5845 m deep) was evaluated through the Western Tropical Atlantic Ocean (TAO) between 15°N and 23°S. The sum concentrations for eight quantifiable PFAS (∑₈PFAS) in surface waters ranged from 11 to 69 pg/L, which is lower than previously reported in the same area as well as in higher latitudes. Perfluoroalkyl carboxylic acids (PFCAs) were the predominant PFASs present in the Western TAO. The 16 surface samples showed variable PFAS distributions, with the predominance of perfluorooctanoic acid (PFOA) along the transect (67%; 11 ± 8 pg/L) and detection of perfluoroalkyl sulfonic acids (PFSAs) only in the Southern TAO. Perfluoroheptanoic acid (PFHpA) was often detected in the vertical profiles. PFAS distribution patterns (i.e., profiles and concentrations) varied with depth throughout the TAO latitudinal sectors (North, Equator, South Atlantic, and in the Brazilian coastal zone). Vertical profiles in coastal samples displayed decreasing PFAS concentrations with increasing depth, whereas offshore samples displayed higher PFAS detection frequencies in the intermediate water masses. Together with the surface currents and coastal upwelling, the origin of the water masses was an important factor in explaining PFAS concentrations and profiles in the TAO.

中文翻译：

西热带大西洋中的全氟烷基物质

通过 15°N 和 23°S 之间的西热带大西洋 (TAO) 评估了全氟烷基物质 (PFAS) 在地表和深水剖面（深达 5845 m）中的分散情况。八种可量化的全氟和多氟烷基物质的总浓度（∑ ₈PFAS）在地表水中的范围为 11 至 69 pg/L，低于先前在同一地区和高纬度地区报告的水平。全氟烷基羧酸 (PFCA) 是西方 TAO 中存在的主要 PFAS。16 个地表样品显示出不同的 PFAS 分布，沿横断面的全氟辛酸 (PFOA) 占主导地位 (67%；11 ± 8 pg/L)，仅在南部 TAO 检测到全氟烷基磺酸 (PFSA)。在垂直剖面中经常检测到全氟庚酸 (PFHpA)。PFAS 分布模式（即剖面和浓度）随着整个 TAO 纬度部门（北部、赤道、南大西洋和巴西沿海地区）的深度而变化。沿海样本的垂直剖面显示 PFAS 浓度随着深度的增加而降低，而近海样本在中间水团中显示出更高的 PFAS 检测频率。连同地表洋流和沿海上升流，水团的起源是解释 TAO 中 PFAS 浓度和分布的重要因素。

更新日期：2021-10-19

点击分享查看原文

点击收藏

公开下载

阅读更多本刊最新论文本刊介绍/投稿指南11