Geochemical sources, deposition and enrichment of heavy metals in short sediment cores from the Pearl River Estuary, Southern China
文献类型：期刊论文
| 作者 | Qi, S ; Leipe, T ; Rueckert, P ; Di, Z ; Harff, J |
| 刊名 | JOURNAL OF MARINE SYSTEMS
 |
| 出版日期 | 2010 |
| 卷号 | 82页码:S28-S42 |
| 关键词 | Elements Sources Depositional environments Enrichment Sediment China Pearl River Estuary |
| ISSN号 | 0924-7963 |
| 通讯作者 | shiqi@scsio.ac.cn |
| 中文摘要 | The Pearl River Estuary (PRE) is the largest estuary in the Southern China. Four short sediment cores (45 60 cm long) recovered within the PECAI project from the estuary have been analyzed for grain size and geochemistry to reveal geochemical source and deposition environment and to assess enrichment and pollution of heavy metals in the sediments. Four geochemical sources were identified as lithogenic, marine biogenic, anthropogenic and reductive deposit by the correlation analysis and principal component analysis. The representative elements and related elemental ratio reflected different depositional environments in the four cores, which are controlled by the hydrodynamic conditions in the PRE. Core 10W300 190 at the mid West Shoal maintained a constant sub-oxic environment with abundant fluvial deposits; core 10W300 480 at the mouth of the estuary formed an oxic environment influenced by the strong two-layer currents, while two cores (10W300 020 and 10W300 630) at the East Shoal experienced an evident change from marine anoxic condition to a weak anoxic or a sub-oxic condition caused by increasing riverine discharges. According to the enrichment factors (EFs) of heavy metals (Co, Cr, Cu, Hg, Ni, Pb and Zn), there was no significant metal enrichment and contamination in the core sediments in spite of that some metals increased and was partly enriched in the uppermost or surface sediments. Hg was enriched in all four cores due to its non-point sources; enrichment of Cu and Pb in the core 10W300 020 was attributed to the proximity with the point sources of the pollutants. Core 10W300 630, with a constant sedimentation rate of 0.45 cm/a by Cs-137 and Pb-210 dating, exhibits that heavy metals began to increase in the 1960s and increased progressively in the 1980s and 1990s, responding to the rapid economic development in the Pearl River delta region in the last three decades. (C) 2010 Elsevier B.V. All rights reserved. |
| 学科主题 | Geosciences, Multidisciplinary; Marine & Freshwater Biology; Oceanography |
| 收录类别 | SCI |
| 原文出处 | ELSEVIER SCIENCE BV |
| WOS记录号 | WOS:000286126700004 |
| 公开日期 | 2011-07-03 |
| 源URL | [http://ir.scsio.ac.cn/handle/344004/4292]  |
| 专题 | 南海海洋研究所_中科院边缘海地质重点实验室 |
| 推荐引用方式 GB/T 7714 | Qi, S,Leipe, T,Rueckert, P,et al. Geochemical sources, deposition and enrichment of heavy metals in short sediment cores from the Pearl River Estuary, Southern China[J]. JOURNAL OF MARINE SYSTEMS,2010,82:S28-S42. |
| APA | Qi, S,Leipe, T,Rueckert, P,Di, Z,&Harff, J.(2010).Geochemical sources, deposition and enrichment of heavy metals in short sediment cores from the Pearl River Estuary, Southern China.JOURNAL OF MARINE SYSTEMS,82,S28-S42. |
| MLA | Qi, S,et al."Geochemical sources, deposition and enrichment of heavy metals in short sediment cores from the Pearl River Estuary, Southern China".JOURNAL OF MARINE SYSTEMS 82(2010):S28-S42. |
入库方式： OAI收割
来源：南海海洋研究所
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