Speciation and Degrees of Contamination of Metals in Sediments from Upstream and Downstream Reaches along the Catchment of the Southern Bohai Sea, China
文献类型：SCI/SSCI论文
| 作者 | Xu L.; Li, J. |
| 发表日期 | 2015 |
| 关键词 | Community Bureau of Reference (BCR) sediment quality guidelines salinity cluster analysis correlation analysis sequential extraction procedure heavy-metals surface sediments trace-metal coastal watersheds northern bohai pearl river yellow seas soils cu |
| 英文摘要 | Environmental processes and biological community structures change along fluvial gradients within coastal river basins; the accumulation and associated risk of metal contamination would also be expected to change from upstream to downstream reaches. Speciation and degrees of contamination of metals in sediments from the upstream and downstream of river catchments of the southern Bohai Sea were investigated. The mean concentrations of Cu, Zn, Cr, Ni, Cd and Pb from upstream reaches were 82.6, 157, 63.6, 26.6, 0.18 and 24.9 mg/kg, respectively. The mean concentrations of Cu, Zn, Cr, Ni, Cd and Pb from downstream reaches were 38.0, 66.0, 38.9, 18.1, 0.16 and 24.0 mg/kg, respectively. Most of the Cu, Zn, Cr, Ni and Pb in sediments from both the upstream and downstream reaches was mainly associated with the residual fraction. However, Cd was preferentially bound to the exchangeable phase. A cluster analysis was used to study the degree of association between sites, and three distinct clusters were identified in both upstream and downstream sediments. A correlation analysis was conducted to determine the extent of association among metals and showed that metals in sediments from the upstream reaches have more affinity than those in the downstream area. Sediment quality guidelines were used to evaluate potential risks. The risks from Zn, Cr and Ni in the upstream reaches were higher than those from downstream reaches; however, the other three metals (Cu, Pb and Cd) showed opposite results. |
| 出处 | International Journal of Environmental Research and Public Health |
| 卷 | 12 |
| 期 | 7 |
| 页 | 7959-7973 |
| 收录类别 | SCI |
| 语种 | 英语 |
| ISSN号 | 1660-4601 |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/38968]  |
| 专题 | 地理科学与资源研究所_历年回溯文献 |
| 推荐引用方式 GB/T 7714 | Xu L.,Li, J.. Speciation and Degrees of Contamination of Metals in Sediments from Upstream and Downstream Reaches along the Catchment of the Southern Bohai Sea, China. 2015. |
入库方式： OAI收割
来源：地理科学与资源研究所
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