PAN Lusheng^1,2, FENG Xinbin^2,*, LIU Xiuwei¹

 

（1.Institute of Geological Environment Monitoring of Guizhou Province, Guiyang 550004, China;
2. State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550180, China）

 

Abstract: To understand the distribution and diffusion flux of dissolved mercury (DHg) and methylmercury (DMeHg), sediment pore water samples were collected from Dongfeng Reservoir (Guizhou Province, SW China) in spring and summer in 2009. The collected samples were analyzed for DHg and MeHg concentrations. According to our data, the DHg concentrations in sediment pore waters collected in summer are significantly higher than that collected in spring, while the DMeHg showed opposite patterns with the DHg. Our study indicates the great potentials of emission of both DHg and DMeHg from the sediment pore waters to the reservoir, with much higher emission flux in summer compared that in spring. Compared withDHg, much larger proportion (up to 30%) of DMeHg can be emitted to the reservoir, indicating that sediment pore waters are important sources of MeHg to the reservoir.

 

Keywords: Dongfengreservoir; sediment pore water; dissolved mercury; dissolved methylmercury

 

EARTH AND ENVIRONMENT Vol. 43, No.5 Tot No.307, 2015, Page 483-489