| Spatial distribution and methylation of mercury in a eutrophic reservoir heavily contaminated by mercury in Southwest China | |
Haiyu Yan ; Qiuhua Li; Bo Meng; Cuiping Wang; Xinbin Feng; Tianrong He; Janusz Dominik
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| 2013 | |
| 发表期刊 | Applied Geochemistry
 |
| 卷号 | 33期号:1页码:182-190 |
| 摘要 | n Baihua Reservoir (BHR), a Hg-contaminated and eutrophic reservoir in SW China, water and sediment samples were collected in June 2010 for the determination of Hg species, metal, major ion and nutrient concentrations. Using a stable isotope tracer technique, (HgCl2)-Hg-202 and (MeHgCl)-Hg-198 were spiked into sediment cores to study methylation and demethylation processes. The inorganic Hg concentration range was 600-13,000 ng/g (dry weight, dw) in the top 10 cm of sediment; exceeding the local background concentration (260 ng/g, dw). Concentrations of Hg species in the water column and pore water were similar to non-Hg contaminated reservoirs in the same watershed. Dissolved total Hg(DHg) and dissolved methylmercury (DMeHg) (mean +/- SD) in the pore water in BHR were 6.8 +/- 3.1 and 0.27 +/- 0.20 ng/L, respectively. Dissolved Hg, DMeHg and reactive Hg (RHg) in the water column were 2.3 +/- 0.9, 0.23 +/- 0.22, and 0.77 +/- 0.17 ng/L, respectively. The vertical distributions of Hg species showed inorganic Hg and methylmercury (MeHg) concentrations peaked near the bottom of the water column, implying the impact of thermal stratification and eutrophic conditions on the production and distribution of Hg species in this reservoir. The methylation rate (<0.1%/day) in these sediments was lower and the demethylation rate (17.6%/day) was higher than those reported in other eutrophic reservoir studies. |
| 学科领域 | 环境地球化学 |
| 收录类别 | SCI |
| 语种 | 英语 |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.gyig.ac.cn/handle/352002/5080 |
| 专题 | 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 |
| 推荐引用方式 GB/T 7714 | Haiyu Yan,Qiuhua Li,Bo Meng,et al. Spatial distribution and methylation of mercury in a eutrophic reservoir heavily contaminated by mercury in Southwest China[J]. Applied Geochemistry,2013,33(1):182-190. |
| APA | Haiyu Yan.,Qiuhua Li.,Bo Meng.,Cuiping Wang.,Xinbin Feng.,...&Janusz Dominik.(2013).Spatial distribution and methylation of mercury in a eutrophic reservoir heavily contaminated by mercury in Southwest China.Applied Geochemistry,33(1),182-190. |
| MLA | Haiyu Yan,et al."Spatial distribution and methylation of mercury in a eutrophic reservoir heavily contaminated by mercury in Southwest China".Applied Geochemistry 33.1(2013):182-190. |
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