Mercury speciation in China's coastal surface seawaters
文献类型：期刊论文
| 作者 | Han, F; Shan, XQ; Zhang, SZ; Wen, B |
| 刊名 | INTERNATIONAL JOURNAL OF ENVIRONMENTAL ANALYTICAL CHEMISTRY
 |
| 出版日期 | 2004 |
| 卷号 | 84期号:8页码:583-598 |
| 关键词 | mercury speciation coastal surface seawater thiol cotton fiber |
| 英文摘要 | Mercury contamination of ocean ecosystems is one of many problems in the global environment. In this paper, mercury speciation for surface seawaters sampled from nine coastal sites of China was performed. Speciation analysis of total particulate mercury (Hg-T)(P), total dissolved mercury (Hg-T)(D), monomethylmercury (MMHg)(D), dimethylmercury (DMHg)(D), mercuric ion (Hg2+)(D) and mercuric chlorocomplexes (HgCl3- and HgCl42-)(D) was carried out by cold vapor atomic fluorescence spectrometry (CVAFS) after separation and preconcentration with thiol cotton fiber (TCF) and anion-exchange resin columns. The concentration of (Hg-T)(D) ranged from 25.3 to 41.1 ng/L. The concentration of dissolved inorganic mercury was in the range of 12.8-24.7 ng/L, which averaged 55.9% of the total dissolved mercury. Dissolved mercuric chlorocomplexes (HgCl3- and HgCl42-)(D) appeared to be the principal speciation, averaging 45.7% of total dissolved mercury. The concentration of (MMHg)(D) was higher in coastal seawaters collected in Beidaihe (2.55 ng/L) and Huludao (2.36 ng/L). In other costal water samples, the concentration of (MMHg)(D) ranged from 0.23 to 0.86 ng/L. A significant inverse correlation was observed between (MMHg)(D) and dissolved oxygen content. Labile inorganic mercury (II) was probably the most likely substrate for mercury methylation. The highest concentration of dissolved DMHg (0.136 ng/L) was detected in seawater sampled in Xiamen. Particulate mercury constituted 51-90% of the total mercury. The enrichment ability of the suspended particle matter for dissolved mercury was calculated to be 0.5x10(3) to 2.1x10(3) . The particulate mercury varied from 12 to 63 ng/g, and the variations were positively correlated with the suspended particle matter concentrations, whereas a negative correlation was observed with salinity. Particulate mercury originated mainly from river inputs. |
| 研究领域[WOS] | Chemistry ; Environmental Sciences & Ecology |
| WOS记录号 | WOS:000222822900003 |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/23458]  |
| 专题 | 生态环境研究中心_环境化学与生态毒理学国家重点实验室 |
| 推荐引用方式 GB/T 7714 | Han, F,Shan, XQ,Zhang, SZ,et al. Mercury speciation in China's coastal surface seawaters[J]. INTERNATIONAL JOURNAL OF ENVIRONMENTAL ANALYTICAL CHEMISTRY,2004,84(8):583-598. |
| APA | Han, F,Shan, XQ,Zhang, SZ,&Wen, B.(2004).Mercury speciation in China's coastal surface seawaters.INTERNATIONAL JOURNAL OF ENVIRONMENTAL ANALYTICAL CHEMISTRY,84(8),583-598. |
| MLA | Han, F,et al."Mercury speciation in China's coastal surface seawaters".INTERNATIONAL JOURNAL OF ENVIRONMENTAL ANALYTICAL CHEMISTRY 84.8(2004):583-598. |
入库方式： OAI收割
来源：生态环境研究中心
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