کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4424983 1619210 2012 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Freely dissolved PBDEs in water and porewater of an urban estuary
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم محیط زیست شیمی زیست محیطی
پیش نمایش صفحه اول مقاله
Freely dissolved PBDEs in water and porewater of an urban estuary
چکیده انگلیسی

Polyethylene passive samplers (PE) were deployed in Narragansett Bay, RI, to examine freely dissolved concentrations of polybrominated diphenyl ethers (PBDEs) in surface, bottom, and sediment porewater. PBDE congeners in the water column and porewater were below 3 pg L−1. In the surface water, only PBDE congeners containing up to 5 bromines were detected, while in the deeper water congeners 153 and 154 (6 bromines) were also detected. Activity ratios of surface-bottom water and porewater-bottom water suggested that lower brominated (di-tetra) congeners reached Narragansett Bay from surface waters and sediments. PBDEs in the surface water probably originated from a combination of air–water exchange, freshwater runoff, rivers, and wastewater treatment plants. It is suggested that deep water was the source of higher brominated PBDEs to the Bay implying that the more hydrophobic PBDEs reached depth on particles and/or that these congeners were degraded in sediments. On-going sources supply PBDEs to Narragansett Bay.

Figure optionsDownload as PowerPoint slideHighlights
► First detection of freely dissolved PBDEs in Narragansett Bay using passive PE samplers.
► Low dissolved concentrations (<3 pg/L) consistent with other methods that correct for DOC.
► Urban signal is apparent in Narragansett Bay, with higher concentrations of PBDEs closer to urban center.
► Environmental gradients suggest surface water and sediments are both sources of low molecular weight PBDE 8.
► Higher MW PBDEs were more abundant in deeper water, suggesting different transport pathway.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Environmental Pollution - Volume 162, March 2012, Pages 287–293
نویسندگان
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