4D dispersion of total gaseous mercury derived from a mining source: identification of criteria to assess risks related to high concentrations of atmospheric mercury

High concentrations of atmospheric mercury (Hg) pose significant inhalation risks, particularly at night, especially when wind speed and solar radiation are minimal. This study identifies critical criteria for assessing Hg-related risks by analyzing vertical and horizontal Hg dispersion over time in Almadenejos, Spain—a site impacted by decommissioned mercury mining. Using data from 2014–2015, researchers developed a model to predict Hg movement patterns, revealing that vertical transfers dominate during active mixing layers (excluding winter), while horizontal transfers prevail at night. The study emphasizes the importance of long-term monitoring, source identification, and background level determination using Lepeltier graphs to characterize Hg dispersion accurately. These findings are crucial for risk assessment under the Minamata Convention's emission reduction goals.

Esbrí, J. M., Higueras, P. L., Martínez-Coronado, A., & Naharro, R. (2020). 4D dispersion of total gaseous mercury derived from a mining source: identification of criteria to assess risks related to high concentrations of atmospheric mercury. Atmospheric Chemistry and Physics, 20(21), 12995–13010. https://doi.org/10.5194/acp-20-12995-2020