Accumulation of natural radionuclides ( 7 Be, 210 Pb) and micro-elements in mosses, lichens and cedar and larch needles
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RESEARCH ARTICLE
Accumulation of natural radionuclides (7Be, 210Pb) and micro-elements in mosses, lichens and cedar and larch needles in the Arctic Western Siberia Yulia Vosel 1 & Dmitriy Belyanin 1,2 & Mikhail Melgunov 1 & Sergey Vosel 2,3 & Kseniya Mezina 1 & Marya Kropacheva 1 & Inna Zhurkova 1 & Boris Shcherbov 1 Received: 8 April 2020 / Accepted: 17 August 2020 # Springer-Verlag GmbH Germany, part of Springer Nature 2020
Abstract This is a study of the atmospheric-origin natural radionuclides (7Be and 210Pb) and a wide range of micro- and macroelement accumulation in mosses, lichens, cedar and larch needles in Arctic western Siberia (Yamal-Nenets Autonomous District). Based on the specific activities measurements of atmospheric precipitation markers (7Be and 210Pb), this study found that the concentration of dust particles in the studied objects incrementally increases in the following order, from lowest concentration to highest: cedar needles, larch needles, lichens and mosses. Concentrations of Zr, Hf, Ti, Th, Fe, V, Li, Na, Si, Be, Y, rare earth elements (REE) and Sc in this area also increase in the same ascending sequence. Enrichment factors of these elements (EF) relative to the North American Shale Composite (NASC) are close to unity, which proves their terrigenous origin. Also, the terrigenous origin of the elements in the studied biological objects is confirmed by their high correlation coefficients with Sc. This means that their concentration in the studied biological objects is the result of a background of solid atmospheric precipitation. Enrichment factors of biogenic elements and their analogues (P, Se, Mn, Mg, Ca, K, Zn, Sr, Ba, Rb, Cs) are significantly greater than unity, and this is associated with high concentrations of these elements in the biological part of the samples. A radially symmetric distribution of Pb content in biological objects is observed over the surface of the studied area (with a center located within the city of Novy Urengoy). This leads to the conclusion that there is a point source around which anthropogenic precipitation of Pb takes place. This distribution is most clearly manifested by the example of larch and cedar needles. Anthropogenic deposition of other elements has not been detected in this study area. Keywords Arctic region . Atmospheric fallout . Mosses . Lichens . Needles . Micro- and macro-elements . 7Be . 210Pb
Responsible Editor: Georg Steinhauser * Yulia Vosel [email protected]
Inna Zhurkova [email protected]
Dmitriy Belyanin [email protected] Mikhail Melgunov [email protected]
Boris Shcherbov [email protected] 1
Sergey Vosel [email protected]
Sobolev Institute of Geology and Mineralogy of the Siberian Branch of the RAS, 3, Ac. Koptyuga ave, Novosibirsk 630090, Russia
2
Kseniya Mezina [email protected]
Novosibirsk State University, 1, Pirogova str., Novosibirsk 630090, Russia
3
Voevodsky Institute of Chemical Kinetics and Combustion of Siberian Branch of the RAS, 3, Institutskaya str., Novosibirsk 630090, Russia
Marya Kropacheva [email protected]
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