Atmospheric mercury deposition in Guizhou, China

The atmospheric deposition of mercury including total gas phase mercury (TG M), gas phase divalent mercury (Hg2+), and gas phase monomethyl mercury (MM Hg) was investigated. Samples were collected from central cities and nature reserve areas across the province. Techniques and equipment including moss bags, KCI-coated denuder and GARDIS-1A portable mercury vapor analyzer wer e employed for sample collection and analysis. The reliability of technique s and analytical methods used for the project was evaluated. The deposition of atmospheric mercury was reported in species in this important mercury p olluted province for the first time. The spatial and temporal variability o f mercury emissions were investigated and reported. Contribution of coal me rcury emissions to the atmosphere mercury deposition of the province was al so investigated. (C) 2000 Elsevier Science B.V. All rights reserved.