J. Phys. IV France
Volume 107, May 2003
Page(s) 1357 - 1360

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. Wang1, 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

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.

© EDP Sciences 2003