The study of mercury exchange rate between air and soil surface in Hongfeng reservoir region, Guizhou, PR China

S. Wang; X. Feng; G. Qiu

doi:doi:10.1051/jp4:20030553

Numéro		J. Phys. IV France Volume 107, May 2003


Page(s)		1357 - 1360
DOI		https://doi.org/10.1051/jp4:20030553

J. Phys. IV France 107 (2003) 1357
DOI: 10.1051/jp4:20030553

The study of mercury exchange rate between air and soil surface in Hongfeng reservoir region, Guizhou, PR China

S. Wang^{1, 2}, X. Feng¹ and G. Qiu²

¹ State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, China
² Graduate School of the Chinese Academy of Sciences, Beijing 100039, China

Abstract
In summer of 2002, we measured the exchange flux of mercury between air and soil surface using the method of Dynamic Flux Chamber (DFC) in Hongfeng lake region. At the same time, we recorded meteorological parameters such as air temperature, soil temperature, wind speed and solar radiation using a multi-function mini-weather station (global water III). Soil, moss and fertilizer samples in study area were also collected. The Hg fluxes of air/soil surface rangeed from -11.0ng m ^-2 h ^-1 to 219.0ng m ^-2h ^-1, averaged at 29.2 ng m ^-2 h ^-1 ( $\rm n = 508$ ). The data show that the exchange of mercury is bi-direction between air and soit surface: namely both emission and deposition of mercury occurs, but Hg emission is much more frequent than deposition process ( $\rm n_{deposition} =3,n_{emission}= 505$ ). The average mercury content in soil, moss, fertilizer sample are $249.9\pm 24.1$ ng/g ( $\rm n=3$ ), $450.4 \pm 64.6$ ng/g ( $\rm n=2$ ), 53.4ng/g ( $\rm n= 1$ ) respectively.