Vertical eddy diffusion as a key mechanism for removing perfluorooctanoic acid (PFOA) from the global surface oceans

被引：24

作者：

Lohmann, Rainer ^{[1
]}

Jurado, Elena ^{[2
,3
]}

Dijkstra, Henk A. ^{[2
]}

Dachs, Jordi ^{[3
]}

机构：

[1] Univ Rhode Isl, Grad Sch Oceanog, Narragansett, RI 02882 USA

[2] Univ Utrecht, Dept Phys & Astron, Inst Marine & Atmospher Res IMAU, NL-3584 CC Utrecht, Netherlands

[3] IDAEA CSIC, Dept Environm Chem, Barcelona 08034, Catalunya, Spain

来源：

ENVIRONMENTAL POLLUTION | 2013年 / 179卷

基金：

美国国家科学基金会;

关键词：

PFOA; Global sink; Diffusion; Oceans; Organic pollutants; PERSISTENT ORGANIC POLLUTANTS; ATMOSPHERIC TRANSPORT; PERFLUORINATED ACIDS; ATLANTIC-OCEAN; WATER; FATE; PCBS; PERFLUOROCARBOXYLATES; PHYTOPLANKTON; DEPOSITION;

D O I：

10.1016/j.envpol.2013.04.006

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Here we estimate the importance of vertical eddy diffusion in removing perfluorooctanoic acid (PFOA) from the surface Ocean and assess its importance as a global sink. Measured water column profiles of PFOA were reproduced by assuming that vertical eddy diffusion in a 3-layer ocean model is the sole cause for the transport of PFOA to depth. The global oceanic sink due to eddy diffusion for PFOA is high, with accumulated removal fluxes over the last 40 years of 660 t, with the Atlantic Ocean accounting for 70% of the global oceanic sink. The global oceans have removed 13% of all PFOA produced to a depth greater than 100 m via vertical eddy diffusion; an additional 4% has been removed via deep water formation. The top 100 m of the surface oceans store another 21% of all PFOA produced (similar to 1100 t). (C) 2013 Elsevier Ltd. All rights reserved.

引用

页码：88 / 94

页数：7

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