کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5746232 1618787 2017 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Spatial distribution and implications to sources of halogenated flame retardants in riverine sediments of Taizhou, an intense e-waste recycling area in eastern China
ترجمه فارسی عنوان
توزیع فضایی و پیامدهای آن به منابع انفجار شعله های هالوژن شده در رسوبات رودخانه ای تایژو، یک منطقه بازیافت الیای شدید در شرق چین
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم محیط زیست شیمی زیست محیطی
چکیده انگلیسی


- Residues of DPs were similar to the median of levels reported globally.
- Dec 604 stemmed from agrochemicals, while others from the use of flame retardants.
- Degradation of PBDEs and DP was evident.
- Distribution of DPs was influenced by a combination of diffuse and point sources.

Concentrations and spatial distribution pattern of organohalogen flame retardants were investigated in the riverine surface sediments from Taizhou, an intensive e-waste recycling region in China. The analytes were syn- and anti- Dechlorane Plus (DP), Dechloranes 602, 603, and 604, a DP monoadduct, two dechlorinated DPs and 8 congeners of polybrominated diphenyl ethers (PBDEs). The concentrations of Σ8PBDEs, ΣDP, ΣDec600s, and ΣDP-degradates ranged from <100 to 172,000, 100 to 55,000, not detectable (nd) to 1600, and nd to 2800 pg/g dry weight, respectively. BDE-209 and DP, both have been manufactured in China, had similar spatial distribution patterns in the study area, featured by distinctly recognizable hotspots some of which are in proximity to known e-waste dumping or metal recycling facilities. Such patterns were largely shared by Dec602 and dechlorinated DP, although their concentration levels were much lower. These major flame retardants significantly correlate with each other, and cluster together in the loading plot of principle component analysis. In contrast, most non-deca PBDE congeners do not correlate with DPs. Dec604 stood out having distinctly different spatial distribution pattern, which could be linked to historical use of mirex. Organic matter content of the sediment was not the dominant factor in determining the spatial pattern of pollution by halogenated flame retardants in the rivers of this study.

193

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemosphere - Volume 184, October 2017, Pages 1202-1208
نویسندگان
, , , , , , , , , ,