Particulate and particulate-bound mercury concentrations and size distributions as related to seasonal variations during peak demandon-peak demand periods

摘要

The particulate size distributions of aerosol pollutants (particulates and Hg(p)) at a mixed site were measured and their seasonal variations identified. Atmospheric particulates and the Hg(p) mass median diameter (m.m.d.) were obtained. Hg(p) concentrations increased by approximately 20% during the peak demand period for all particle sizes (18, 10, 2.5, 1 and 0.3 mu m). The mean percentage concentration of Hg(p) was highest in summer and followed the order summer spring winter autumn for all particle sizes. Hg(p) concentration exhibited increased from 2004 to 2019.