کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4431167 1619888 2009 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Spatial diastereomer patterns of hexabromocyclododecane (HBCD) in a Norwegian fjord
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم محیط زیست شیمی زیست محیطی
پیش نمایش صفحه اول مقاله
Spatial diastereomer patterns of hexabromocyclododecane (HBCD) in a Norwegian fjord
چکیده انگلیسی

Hexabromocyclododecane (HBCD) is the third most used brominated flame retardant globally, and has been found widely distributed in the environment. The present study reports concentrations and spatial patterns of α, β and γ-HBCD in a contaminated Norwegian fjord. Intertidal surface sediment and selected species from the marine food web were sampled at five locations in increasing distance from a known point source of HBCD. All sediment and biota samples were analyzed for the three HBCD diastereomers by liquid chromatography and mass spectrometry (LC/MS). The results demonstrated a HBCD gradient with decreasing concentrations at increasing distance from the point source in sediment and sedentary species, but less so in the species with large feeding ranges. Mean concentrations of ΣHBCD at the closest/most remote locations relative to the point source were 9000/300 ng g− 1 TOC in sediment and 150/90 ng g− 1 lw in the species with largest feeding range (great black-backed gull). The HBCD diastereomer patterns were similar for each of the matrices (sediment, organisms) independent of distance from the source, indicating no difference in environmental partitioning between the diastereomers. However, the concentration ratio of diastereomers in each matrix ranged from 3:1:10 (α:β:γ) in the sediments to 55:1 (α:γ) in the highest trophic level species, suggesting diastereomer-specific bioaccumulation in the organisms.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Science of The Total Environment - Volume 407, Issue 22, 1 November 2009, Pages 5907–5913
نویسندگان
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