A MERCURY RE-EMISSIONS MODEL (MREM) FOR NATURAL SURFACES

摘要

The processes leading to atmospheric mercury dispersion are governed by the industrial use of elemental mercury (Hg°) in anthropogenic emissions and the emissions from natural surfaces. The emissions of Hg° from contaminated surfaces have long beenknown. However, elemental mercury is readily re-emitted from natural surfaces due to its high vapor pressure (Lindberg et al, 1998). Recent studies have shown that the contribution of natural Hg emissions to the global Hg pool is roughly equal to the anthropogenic emissions. A natural Hg emissions database must be developed to accurately model atmospheric Hg.