
The study shows how anthropogenic emissions of halogens, such as chlorine or bromine, accelerate the oxidation and deposition of atmospheric mercury and, consequently, increase exposure to their effects on people and ecosystems.
The work, led by IQF researchers, reveals that the recently discovered anthropogenic emissions of reactive halogens (chlorine, bromine and iodine) increase the oxidation of mercury, a potent neurotoxin, over continental areas. The oxidation chemistry of mercury in the atmosphere is key for the deposition of atmospheric mercury to the Earth's surface, since it produces soluble oxidized mercury compounds that are deposited, mainly, by precipitation in the form of rain. This process results in higher deposition of mercury near the emission points, thus increasing the exposure to mercury of the populations near these locations.…