کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4424444 1619181 2014 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
The fate of per- and polyfluoroalkyl substances within a melting snowpack of a boreal forest
ترجمه فارسی عنوان
سرنوشت مواد پروتئین و پلی فلوئوروآلکولی در یک برف پودر ذوب یک جنگل ساحلی
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم محیط زیست شیمی زیست محیطی
چکیده انگلیسی


• C4 and C5 PFCAs and PFSAs were ∼10-fold higher in snow compared to PFOA and PFOS.
• PFASs migrate to deeper snow layers during the melting process.
• C4−8 PFCA loads decreased as melt progressed, but increased for PFSAs and C10−12 PFCA.

Per- and polyfluoroalkyl substances (PFAS) were measured systematically in a snowpack in northern Sweden to determine chemical behaviour during seasonal melt. Average PFAS concentrations were generally low, but displayed a wide range with median (range) concentrations of PFOA and PFOS of 66.5 pg L−1 (ND-122) and 20.5 pg L−1 (2.60–253) respectively. Average concentrations of the shorter chain, C4 and C5 perfluoroalkyl carboxylates (PFCAs) and perfluoroalkyl sulfonates (PFSAs), were ∼10-fold higher. Differences in the PFAS concentrations and profile were observed between surface snow and deeper layers, with evidence of PFAS migration to deeper snow layers as melt progressed. Chemical loads (ng m−2) for C4−9 PFCAs decreased gradually as melt progressed, but increased for C4, C6−8 PFSAs and the longer chain C10−12 PFCAs. This enrichment in the diminishing snowpack is an unusual phenomenon that will affect PFAS elution with meltwater and subsequent entry to catchment surface waters.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Environmental Pollution - Volume 191, August 2014, Pages 190–198
نویسندگان
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