Center for Environmental and Human Toxicology, Department of Physiological Sciences, College of Veterinary Medicine, University of Florida, Gainesville, Florida 32611, United States.
St. Johns River Water Management District, Palm Bay, Florida 32909, United States.
J Am Soc Mass Spectrom. 2023 Sep 6;34(9):1826-1836. doi: 10.1021/jasms.3c00018. Epub 2023 May 10.
Per- and polyfluoroalkyl substances (PFAS) are a class of manufactured chemicals that have been extensively utilized worldwide. We hypothesize that the presence, uptake, and accumulation of PFAS in aquatic vegetation (AV) is dependent upon several factors, such as the physiochemical properties of PFAS and proximity to potential sources. In this study, AV was collected from eight locations in Florida to investigate the PFAS presence, accumulation, and spatiotemporal distribution. PFAS were detected in AV at all sampling locations, with a range from 0.18 to 55 ng/g sum (∑)PFAS. Individual PFAS and their concentrations varied by sampling location, time, and AV species. A total of 12 PFAS were identified, with the greatest concentrations measured in macroalgae. The average bioconcentration factor (BCF) among all samples was 1225, indicating high PFAS accumulation in AV from surface water. The highest concentrations, across all AV types, were recorded in the Indian River Lagoon (IRL), a location with a history of elevated PFAS burdens. The present study represents the first investigation of PFAS in naturally existing estuarine AV, filling an important gap on PFAS partitioning within the environment, as well as providing insights into exposure pathways for aquatic herbivores. Examining the presence, fate, and transport of these persistent chemicals in Florida's waterways is critical for understanding their effect on environmental, wildlife, and human health.
全氟和多氟烷基物质（PFAS）是一类已在全球范围内广泛使用的人工合成化学品。我们假设，PFAS 在水生植被（AV）中的存在、摄取和积累取决于多种因素，例如 PFAS 的物理化学性质以及与潜在来源的接近程度。在这项研究中，从佛罗里达州的 8 个地点采集 AV，以调查 PFAS 的存在、积累和时空分布。在所有采样地点均检测到 AV 中的 PFAS，其浓度范围为 0.18 至 55ng/g 总和（∑）PFAS。单个 PFAS 及其浓度因采样地点、时间和 AV 物种而异。共鉴定出 12 种 PFAS，其中浓度最高的是在大型藻类中。所有样本的平均生物浓缩系数（BCF）为 1225，表明来自地表水的 AV 中 PFAS 积累量很高。在所有 AV 类型中，浓度最高的是在印度河泻湖（IRL），该地区曾有过 PFAS 负荷升高的历史。本研究首次调查了自然存在的河口 AV 中的 PFAS，填补了环境中 PFAS 分配的重要空白，并为水生食草动物的暴露途径提供了新的见解。研究佛罗里达州水道中这些持久性化学物质的存在、命运和迁移对于了解它们对环境、野生动物和人类健康的影响至关重要。
