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Evaluation of possible impact on human health of atmospheric mercury emanations from the Popocatépetl volcano

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Abstract

The contribution of Hg from volcanic emanations is decisive for assessing global mercury emissions given the impact of this highly toxic contaminant on human health and ecosystems. Atmospheric Hg emissions from Popocatépetl volcano and their dispersion were evaluated carrying out two gaseous elemental mercury (GEM) surveys during a period of intense volcanic activity. Continuous GEM measurements were taken for 24 h using a portable mercury vapor analyzer (Lumex RA-915M) at the Altzomoni Atmospheric Observatory (AAO), 11 km from the crater. In addition, a long-distance survey to measure GEM was conducted during an automobile transect around the volcano, covering a distance of 129 km. The evaluation of the GEM data registered in the fixed location showed that heightened volcanic activity clearly intensifies the concentration of atmospheric Hg, extreme values around 5 ng m−3. Highest concentrations of GEM recorded during the mobile survey were about 10 ng m−3. In both surveys, the recorded concentrations during most of the measurement time were below 2 ng m−3, but measurements were taken at a considerable distance from the crater, and GEM is subject to dilution processes. During both surveys, recorded GEM did not exceed the 200 ng m−3 concentration recommended by the WHO (Air quality guidelines for Europe, 2000) as the regulatory limits for Hg in the atmospheric environment for long-term inhalation. Because this study was carried out in inhabited areas around the volcano during a period of intense volcanic activity, it can be concluded that the Popocatépetl does not represent a risk to human health in terms of Hg.

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Acknowledgements

We thank the RUOA (Red Universitaria de Observatorios Atmosféricos) for meteorological data. Lumex RA-915M mercury vapor analyzer was purchased with the financial support of the Project 268074 GEMEX Cooperación Mexico-Europa para la investigación de sistemas geotérmicos mejorados y sistemas geotérmicos super calientes.

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Correspondence to B. Schiavo.

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Schiavo, B., Morton-Bermea, O., Salgado-Martinez, E. et al. Evaluation of possible impact on human health of atmospheric mercury emanations from the Popocatépetl volcano. Environ Geochem Health 42, 3717–3729 (2020). https://doi.org/10.1007/s10653-020-00610-6

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  • DOI: https://doi.org/10.1007/s10653-020-00610-6

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