کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4424275 1619164 2016 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Interplay of metals and bromine with dioxin-related compounds concentrated in e-waste open burning soil from Agbogbloshie in Accra, Ghana
ترجمه فارسی عنوان
تعامل فلزات و برم با ترکیبات مربوط به دیوکسین متمرکز در خاک آزادسوزانی زباله های الکترونیکی از Agbogbloshie در آکرا، غنا
کلمات کلیدی
زباله های الکترونیکی؛ آزادسوزانی ؛ فلزات؛ ترکیبات مربوط به دیوکسین؛ XAFS
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم محیط زیست شیمی زیست محیطی
چکیده انگلیسی


• Extremely high DRCs were detected from an open burning soil of e-waste.
• Predominant DRCs were PBDFs, PCDFs, PCDDs, and DL-PCBs.
• Some metals shows good correlation to DRCs by PCA and cluster analysis.
• Speciation of Cu, Pb, Zn in residual soil were successfully measured by XAFS.
• Electron transfer via Cu(II) → Cu(I) can be important for DRCs formation.

Open burning of electronic waste (e-waste) releases various metals and organohalogen compounds in the environment. Here we investigated the interplay of metals (Cu, Pb, Zn, Fe, Co, and Sr) and bromine (Br) in the formation of dioxin-related compounds (DRCs), including polychlorinated dibenzo-p-dioxins/furans (PCDD/Fs) and dioxin-like polychlorinated biphenyls (DL-PCBs), as well as non-regulated DRCs such as polybrominated dibenzo-p-dioxins/furans (PBDD/Fs) and their monobrominated PCDD/Fs in soils sampled from open burning e-waste sites at Agbogbloshie in Accra, Ghana. The predominant DRCs were PBDFs, PCDFs, PCDDs, and DL-PCBs. Statistical analyzes, X-ray absorption spectroscopy, and the PCDF/PCDD ratio suggested possible formation paths of PCDD/Fs and DL-PCBs by catalytic behaviors of copper chlorides (CuCl, CuCl2, and Cu2(OH)3Cl) and thermal breakdown of polyvinyl chloride. Predominant formation of brominated furans may be derived from electron transfer from intermediates of PBDE to copper, Cu(II) → Cu(I). Lead chloride also contributed to generate DRCs and may become highly bioaccessible through the open burning of e-waste. The main zinc species (ZnCl2 and ZnS) suggested a possible relationship to generate DRCs and specific zinc source such as tire burning. Cu, Pb, Zn, and Br contained in various e-wastes, wires/cables, plastics, and tires strongly influenced generation of many DRCs.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Environmental Pollution - Volume 209, February 2016, Pages 155–163
نویسندگان
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