Perfluoroalkyl substances (PFAS) in surface water and sediments from two urban watersheds in Nevada, USA
Perfluoroalkyl substances (PFAS) in surface water and sediments from two urban watersheds in Nevada, USA
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DOI：
10.1016/j.scitotenv.2020.141622
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发表时间：
2021-01-10
影响因子：
9.8
通讯作者：
Son, Yeongkwon
中科院分区：
文献类型：
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作者：
Bai, Xuelian;Son, Yeongkwon
本研究测量了17个全氟烷基物质（PFAS）的地表水和沉积物中收集的沿着拉斯维加斯洗和米德湖和8个地点沿沿着特拉基河，太浩湖，金字塔湖在内华达州，美国。在分析的17种PFAS中，12种在地表水（n = 18）中检测到，14种在两个流域的沉积物（n = 21）中检测到。特拉基河水中PFAS的总浓度为441.7 ng/L，在拉斯维加斯洗涤水中检测到的PFAS为2234.3 ng/L。在水中发现的主要全氟辛烷磺酸物质是全氟己酸（PFHxA）（1.5-187.0纳克/升），其次是全氟戊酸（PFPeA）（低于检测限[BDL]，为169.9纳克/升）、全氟辛酸（PFOA）（BDL为65.5纳克/升）和全氟丁烷磺酸（PFBS）（BDL为44.7纳克/升）。Truckee河沉积物中的总PFAS为272.9 μ g/kg（干重），拉斯维加斯河为345.7 μ g/kg。沉积物中的主要物种是全氟癸烷磺酸（PFDS）（BDL至88.2微克/千克）、PFHxA（BDL至20.3微克/千克）、PFBS（BDL至29.1微克/千克）和全氟十一烷酸（PFUA）（BDL至22.9微克/千克）。结果表明，短链PFAS（C8）在沉积物中的检出率较高。与Truckee河水相比，拉斯维加斯洗涤水具有高得多的PFAS水平。沿拉斯维加斯沃什的PFAS浓度和检测频率也显着下降，夏季相比，冬季沿着。(C)2020爱思唯尔B. V.保留所有权利。
This study measured 17 perfluoroalkyl substances (PFAS) in surface water and sediments collected from six locations along the Las Vegas Wash and Lake Mead and eight locations along the Truckee River, Lake Tahoe, and Pyramid Lake in Nevada, United States. Of the 17 PFAS analyzed, 12 were detected in the surface water (n = 18) and 14 were detected in the sediments (n = 21) of the two watersheds. The total concentration of PFAS in the Truckee River water was 441.7 ng/L and the PFAS detected in the Las Vegas Wash water was 2234.3 ng/L. The predominant PFAS species found in the water were perfluorohexanoic acid (PFHxA) (1.5-187.0 ng/L), followed by perfluoropentanoic acid (PFPeA) (below detection limit [BDL] to 169.9 ng/L), perfluorooctanoic acid (PFOA) (BDL to 65.5 ng/L), and perfluorobutane sulfonic acid (PFBS) (BDL to 44.7 ng/L). The total PFAS in the sediments was 272.9 mu g/kg (dry weight) for the Truckee River and 345.7 mu g/kg for the Las Vegas Wash. The predominant species in the sediments were perfluorodecane sulfonic acid (PFDS) (BDL to 88.2 mu g/kg), PFHxA (BDL to 20.3 mu g/kg), PFBS (BDL to 29.1 mu g/Kg), and perfluoroundecanoic acid (PFUA) (BDL to 22.9 mu g/kg). The results demonstrated that short-chain PFAS (C 8) were more detectable in sediments. The Las Vegas Wash water had much higher PFAS levels compared with the Truckee River water. The PFAS concentrations and detection frequencies also significantly decreased in summer compared with winter along the Las Vegas Wash. (C) 2020 Elsevier B.V. All rights reserved.