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在南极海岸的 perfluoroalkyl 物质的输入,放大和沉没

Gemma Casas¹, Jon Iriarte², Lisa A D'Agostino³

¹Institute of Environmental Assessment and Water Research, Spanish National Research Council (IDAEA-CSIC), Catalonia, Barcelona, Spain; Department of Instrumental Analysis and Environmental Chemistry, Institute of Organic Chemistry, Spanish National Research Council (IQOG-CSIC), Madrid, Spain; BETA Tech Center, University of Vic, Catalonia, Vic, Spain.

Environmental pollution (Barking, Essex : 1987)

|September 24, 2023

概括

perfluoroalkyl物质 (PFAS) 主要通过大气沉积进入南极沿岸地区. 雪地清理和融化在地表水中放大了PFAS,微生物降解需要进一步研究.

科学领域:

环境化学环境化学
极地科学极地科学
生物地质化学生物地质化学

背景情况:

在极地沿海地区,包括 perfluoroalkyl 酸 (PFAA) 在内的 perfluoroalkyl 物质 (PFAS) 的来源,生物地化学控制和沉积点在很大程度上是未知的.
由于潜在的生态系统影响和远程运输,了解南极洲的PFAS命运至关重要.

研究的目的:

评估南极海岸环境中PFAA的来源,生物地质化学控制和沉积点.
调查大气沉积和雪过程在PFAA分布中的作用.
评估南极地区PFAA的趋势和潜在的去除机制.

主要方法:

在气溶,降水,雪,湖水和海水中采集PFAA的综合多区分采样.
在三个南极夏季对利文斯顿和欺骗群岛的PFAA度进行分析.
在不同的环境矩阵和地点比较PFAA水平.

主要成果:

大气样本中大量存在PFAA,证实大气沉积是南极洲的主要输入途径.
海上喷雾气溶结合PFAA的雪地清理,然后雪地融化显著放大了表面水中的PFAA度.
与利文斯顿岛相比,在欺骗岛观察到更高的PFAA水平,这与其半封闭的海湾有关.
perfluorooctanesulfonic 酸 (PFOS) 度在2014年至2018年期间呈现下降趋势.

结论:

大气沉积是南极沿岸地区PFAA的主要来源.
雪地过程在地表水中的PFAA度方面发挥着重要作用.
观察到的PFOS下降表明沉没超出了生物过程或海喷损失,突出了微生物降解是PFAA持久性的关键研究重点.

关键词:

放大功率是指放大功率是指放大功率.在南极洲,南极洲是南极洲.沿海的沿海地区.降解降解是一种降解.湖泊的湖泊湖泊的湖泊远程运输是远程运输.海洋细菌是一种海洋细菌.这就是PFAA.在PFAS中,我们可以使用PFAS.这就是PFOA的PFOA.在PFOS系统中,我们可以这是POPs POPs.海水是海水,海水是海水.雪雪雪雪雪雪雪南大洋南大洋的海洋

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