Natural source of gases
Volcanic emissions represent one of the most important natural sources of major and trace elements (gases and particulates) to the atmosphere (e.g. S, F, As, Cd, Cu, Hg, Pb, Sb, Tl and Zn), sequentially influencing the other geochemical spheres (hydrosphere, lithosphere and biosphere) through atmospheric deposition. Nyiragongo and Nyamulagira volcanoes, in the Virunga Volcanic Province (Democratic Republic of Congo), are among the ten major emitters of volatiles to the atmosphere.
Biomonitoring
Biomonitoring techniques have been widely used in environmental studies to monitor anthropogenic pollutants. Recently such techniques have been also applied to ascertain the impact of contaminants naturally released by volcanic activity (Calabrese et al., 2015; Arndt et al., 2017). In the present study a biomonitoring survey has been performed in different sites around Nyiragongo and Nyamulagira active volcanoes (D.R. Congo). Here, we report the first preliminary results of a new and original study on atmospheric depositions collected in 2011 and 2014, aiming to investigate the impact of the volcanogenic deposition in the surrounding of these two active.
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