Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.5194/acp-18-5045-2018 |
Continuous non-marine inputs of per- and polyfluoroalkyl substances to the High Arctic: a multi-decadal temporal record | |
Pickard, Heidi M.1; Criscitiello, Alison S.2; Spencer, Christine3; Sharp, Martin J.2; Muir, Derek C. G.3; De Silva, Amila O.3; Young, Cora J.1,4 | |
2018-04-13 | |
发表期刊 | ATMOSPHERIC CHEMISTRY AND PHYSICS
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ISSN | 1680-7316 |
EISSN | 1680-7324 |
出版年 | 2018 |
卷号 | 18期号:7页码:5045-5058 |
文章类型 | Article |
语种 | 英语 |
国家 | Canada |
英文摘要 | Perfluoroalkyl acids (PFAAs) are persistent, in some cases, bioaccumulative compounds found ubiquitously within the environment. They can be formed from the atmospheric oxidation of volatile precursor compounds and undergo long-range transport (LRT) through the atmosphere and ocean to remote locations. Ice caps preserve a temporal record of PFAA deposition making them useful in studying the atmospheric trends in LRT of PFAAs in polar or mountainous regions, as well as in understanding major pollutant sources and production changes over time. A 15m ice core representing 38 years of deposition (1977-2015) was collected from the Devon Ice Cap in Nunavut, providing us with the first multi-decadal temporal ice record in PFAA deposition to the Arctic. Ice core samples were concentrated using solid phase extraction and analyzed by liquid and ion chromatography methods. Both perfluoroalkyl carboxylic acids (PFCAs) and perfluoroalkyl sulfonic acids (PFSAs) were detected in the samples, with fluxes ranging from < LOD to 141 ngm(-2) yr(-1). Our results demonstrate that the PFCAs and perfluorooctane sulfonate (PFOS) have continuous and increasing deposition on the Devon Ice Cap, despite recent North American and international regulations and phase-outs. We propose that this is the result of on-going manufacture, use and emissions of these compounds, their precursors and other newly unidentified compounds in regions outside of North America. By modelling air mass transport densities, and comparing temporal trends in deposition with production changes of possible sources, we find that Eurasian sources, particularly from Continental Asia, are large contributors to the global pollutants impacting the Devon Ice Cap. Comparison of PFAAs to their precursors and correlations of PFCA pairs showed that deposition of PFAAs is dominated by atmospheric formation from volatile precursor sources. Major ion analysis confirmed that marine aerosol inputs are unimportant to the long-range transport mechanisms of these compounds. Assessments of deposition, homologue profiles, ion tracers, air mass transport models, and production and regulation trends allow us to characterize the PFAA depositional profile on the Devon Ice Cap and further understand the LRT mechanisms of these persistent pollutants. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000430450100001 |
WOS关键词 | DEVON ICE CAP ; PERFLUORINATED CARBOXYLIC-ACIDS ; GLOBAL EMISSION INVENTORIES ; PERFLUOROALKYL SUBSTANCES ; PERFLUOROCARBOXYLIC ACIDS ; FLUOROTELOMER ALCOHOLS ; ATMOSPHERIC TRANSPORT ; PERFLUOROOCTANE SULFONATE ; FLUORINATED ALTERNATIVES ; PFCA HOMOLOGS |
WOS类目 | Environmental Sciences ; Meteorology & Atmospheric Sciences |
WOS研究方向 | Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/19519 |
专题 | 地球科学 |
作者单位 | 1.Mem Univ, Dept Chem, St John, NF A1B 3X7, Canada; 2.Univ Alberta, Dept Earth & Atmospher Sci, Edmonton, AB T6G 2E3, Canada; 3.Environm & Climate Change Canada, Aquat Contaminants Res Div, Burlington, ON L7S 1A1, Canada; 4.York Univ, Dept Chem, Toronto, ON M3J 1P3, Canada |
推荐引用方式 GB/T 7714 | Pickard, Heidi M.,Criscitiello, Alison S.,Spencer, Christine,et al. Continuous non-marine inputs of per- and polyfluoroalkyl substances to the High Arctic: a multi-decadal temporal record[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2018,18(7):5045-5058. |
APA | Pickard, Heidi M..,Criscitiello, Alison S..,Spencer, Christine.,Sharp, Martin J..,Muir, Derek C. G..,...&Young, Cora J..(2018).Continuous non-marine inputs of per- and polyfluoroalkyl substances to the High Arctic: a multi-decadal temporal record.ATMOSPHERIC CHEMISTRY AND PHYSICS,18(7),5045-5058. |
MLA | Pickard, Heidi M.,et al."Continuous non-marine inputs of per- and polyfluoroalkyl substances to the High Arctic: a multi-decadal temporal record".ATMOSPHERIC CHEMISTRY AND PHYSICS 18.7(2018):5045-5058. |
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