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Probing Hg evasion from surface waters of two Chinese hyper/meso-eutrophic reservoirs
Xuewu Fu; Xinbin Feng; Qi Wan; Bo Meng; Haiyu Yan; Yanna Guo
Corresponding AuthorXinbin Feng
2010
Source PublicationScience of The Total Environment
Volume408Issue:23Pages:5887-5896
Abstract

Measurements of water/air exchange flux of gaseous elemental mercury (GEM) were conducted in a hyper-eutrophic reservoir and a meso-eutrophic reservoir in southwest China in both warm and cold seasons by using a dynamic flux chamber (DFC) method coupled with an automatic gaseous Hg analyzer. Both strong diurnal and seasonal variations of GEM fluxes were observed. The diurnal cycle of the GEM flux was more pronounced during sunny days compared to cloudy and rainy days, which highlights the effect of solar intensity on the GEM flux. GEM fluxes in warm seasons were considerably higher (2.5 to 4.1 times higher) than in cold seasons, which was attributed to the combined factors including meteorological factors, water quality parameters and water Hg concentrations. Clear variation in GEM fluxes was observed between the two reservoirs. Mean GEM fluxes in the hyper-eutrophic reservoir (WJD) (3.220.1 ng m−2 h−1) were significantly higher than those in the meso-eutrophic reservoir (SFY) (0.6–4.4 ng m−2 h−1). Evasion of Hg played a distinct role in the mass balance of Hg in the two reservoirs. In WJD, evasion was the second most important mechanism for Hg losses from the reservoir (17.5% of the total losses); whereas in SFY, loss of Hg via volatilization constituted an extremely little portion to the total losses of Hg (0.8%).

KeywordGem Flux Eutrophication Subtropical Reservoir Spatial And Temporal Variation Mass Balance
Subject Area环境地球化学
Indexed BySCI
Language英语
Document Type期刊论文
Identifierhttp://ir.gyig.ac.cn/handle/352002/4950
Collection环境地球化学国家重点实验室_环境地球化学国家重点实验室_期刊论文
环境地球化学国家重点实验室
Corresponding AuthorXinbin Feng
Recommended Citation
GB/T 7714
Xuewu Fu,Xinbin Feng,Qi Wan,et al. Probing Hg evasion from surface waters of two Chinese hyper/meso-eutrophic reservoirs[J]. Science of The Total Environment,2010,408(23):5887-5896.
APA Xuewu Fu,Xinbin Feng,Qi Wan,Bo Meng,Haiyu Yan,&Yanna Guo.(2010).Probing Hg evasion from surface waters of two Chinese hyper/meso-eutrophic reservoirs.Science of The Total Environment,408(23),5887-5896.
MLA Xuewu Fu,et al."Probing Hg evasion from surface waters of two Chinese hyper/meso-eutrophic reservoirs".Science of The Total Environment 408.23(2010):5887-5896.
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