کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5748945 1619148 2017 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Chlorinated pesticides and natural brominated anisoles in air at three northern Baltic stations
ترجمه فارسی عنوان
آفت کش ها کلر شده و آنیزول های برومند طبیعی در هوا در سه ایستگاه شمالی بالتیک
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم محیط زیست شیمی زیست محیطی
چکیده انگلیسی


- Pesticides and bromoanisoles in air were measured by passive and active sampling
- Effective passive sampling rates depended on PUF-air partition coefficients.
- Pesticide concentrations were uniform over the western Bothnian Bay region.
- Compound profiles distinguished Bothnian Bay from arctic air monitoring stations.
- Bromoanisole profiles distinguished Baltic Sea emissions from westerly transport.

Polyurethane foam (PUF) disk passive samplers were deployed at one inland and two island locations in the Bothnian Bay region of the northern Baltic Sea. Uptake was linear over 81-147 d and a temperature range of −2.6 to 14.2 °C for organochlorine pesticides (OCPs) and current-use pesticides (CUPs) having log KOA ≥9 at ambient temperatures. Partial saturation of the PUF disks occurred for the more volatile OCPs hexachlorocyclohexanes (HCHs) and hexachlorobenzene (HCB), and for bromoanisoles (BAs), which are products of bromophenols released by natural and anthropogenic sources. Correction for nonlinear uptake of these was made using experimentally measured PUF-air partition coefficients. Passive-derived air concentrations of pesticides were uniform over the bay and agreed within a factor of 2 or better with levels determined by active (pumped) sampling at one of the island stations. Levels of OCPs were similar to those reported at background sites in the European and Canadian Arctic and at monitoring stations in the central Baltic and southern Scandinavia, indicating long-range transport. The insecticide chlorpyrifos was 10 times lower at bay stations than in the Canadian Arctic. Insight to sources and processes was gained by examining compound profiles. Fractions Falpha = α-HCH/(α-HCH + γ-HCH) and FTC = trans-chlordane/(trans-chlordane + cis-chlordane) at bay stations were higher than in the Norwegian and Finnish Arctic and similar to those at the southern monitoring stations. Volatilization of chlordanes from Baltic seawater may also modify FTC. Higher FTriBA = 2,4,6-TriBA/(2,4,6-TriBA + 2,4-DiBA) distinguished local volatilization from the Baltic Sea versus lower FTriBA found at the inland site and reported in air on the Norwegian coast, suggesting westerly transport from the Atlantic across Norway and Sweden.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Environmental Pollution - Volume 225, June 2017, Pages 381-389
نویسندگان
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