کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5745949 1618788 2017 13 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Dioxin in the river Elbe
ترجمه فارسی عنوان
دیوکسین در رودخانه الب
کلمات کلیدی
دیوکسین، گیاه منیزیم، رودخانه الب، رسوب، تشخیص الگو، سقوط قرن،
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم محیط زیست شیمی زیست محیطی
چکیده انگلیسی
This paper provides a macro-analysis of the dioxin contamination in the river Elbe from the 1940s to the present. Based on different data sets, the historic dioxin concentration in the Elbe has been reconstructed. For the section between the tributary Mulde and Hamburg, during the 1940s, we find a concentration of about 1500 pg WHO-TEQ g−1. We argue that this dioxin contamination was caused mainly by emissions from a magnesium plant in Bitterfeld-Wolfen, whose effluents were discharged into a tributary of the river Mulde which flows into the Elbe. Dioxin pattern recognition with neural networks (Kohonen) confirms this. A model simulation shows that a hypothetical dioxin concentration of 10,000 pg WHO-TEQ g−1 in the tributary Mulde could have caused the reconstructed dioxin concentration of 1500 pg WHO-TEQ g−1 in the Elbe. The recent dioxin concentration (about 25-100 pg WHO-TEQ g−1) in the river Elbe, downstream the tributary Mulde, originates, according to our hypothesis, from emissions of the banks and the highly contaminated flood plains (transport of the particle bound dioxin). As other possible dioxin sources, the following could be excluded: the dioxin concentration in the Mulde, groynes, small ports, sport boat harbours, and extreme floods. Our hypothesis is supported by the results of pattern recognition techniques and a model simulation. According to these findings, we argue that remediation efforts to reduce the dioxin concentration in the river Elbe are unlikely to be successful.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemosphere - Volume 183, September 2017, Pages 229-241
نویسندگان
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