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| Environmental evolution records reflected by radionuclides in the sediment of coastal wetlands: A case study in the Yellow River Estuary wetland | |
Wang, Qidong1,2 ; Song, Jinming1; Li, Xuegang1; Yuan, Huamao1; Li, Ning1; Cao, Lei1
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| 2016-10-01 | |
| 发表期刊 | JOURNAL OF ENVIRONMENTAL RADIOACTIVITY
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| 卷号 | 162页码:87-96 |
| 文章类型 | Article |
| 摘要 | Vertical profiles of environmental radionuclides (Pb-210, Cs-137, U-238, Th-232, Ra-226 and K-40) in a sediment core (Y1) of the Yellow River Estuary wetland were investigated to assess whether environmental evolutions in the coastal wetland could be recorded by the distributions of radionuclides. Based on Pb-210 and Cs-137 dating, the average sedimentation rate of core 11 was estimated to be 1.0 cm y(-1). Vertical,, distributions of natural radionuclides ((238)u Th-232 Ra-226 and K-40) changed dramatically, reflecting great changes in sediment input. Concentrations of U-238, Th-232, Ra-226 and K-40 all had significant positive relationships with organic matter and clay content, but their distributions were determined by different factors. Factor analysis showed that U-238 was determined by the river sediment input while Ra-226 was mainly affected by the seawater erosion. Environmental changes such as river channel migrations and sediment discharge variations could always cause changes in the concentrations of radionuclides. High concentrations of U-238 and Ra-226 were consistent with high accretion rate. Frequent seawater intrusion decreased the concentration of Ra-226 significantly. The value of U-238,(226) Ra tended to be higher when the sedimentation rate was low and tide intrusion was frequent. In summary, environmental evolutions in the estuary coastal wetland could be recorded by the vertical profiles of natural radionuclides. (C) 2016 Elsevier Ltd. All rights reserved. |
| 关键词 | Radionuclides Vertical Distribution Environmental Evolution Wetland Sediments Yellow River Estuary |
| DOI | 10.1016/j.jenvrad.2016.05.015 |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000390183000011 |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 版本 | 出版稿 |
| 条目标识符 | http://ir.qdio.ac.cn/handle/337002/136250 |
| 专题 | 海洋生态与环境科学重点实验室 海洋环流与波动重点实验室 |
| 作者单位 | 1.Chinese Acad Sci, Inst Oceanol, Key Lab Marine Ecol & Environm Sci, 7 Nanhai Rd, Qingdao 266071, Shandong, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China |
| 第一作者单位 | 中国科学院海洋研究所 |
| 推荐引用方式 GB/T 7714 | Wang, Qidong,Song, Jinming,Li, Xuegang,et al. Environmental evolution records reflected by radionuclides in the sediment of coastal wetlands: A case study in the Yellow River Estuary wetland[J]. JOURNAL OF ENVIRONMENTAL RADIOACTIVITY,2016,162:87-96. |
| APA | Wang, Qidong,Song, Jinming,Li, Xuegang,Yuan, Huamao,Li, Ning,&Cao, Lei.(2016).Environmental evolution records reflected by radionuclides in the sediment of coastal wetlands: A case study in the Yellow River Estuary wetland.JOURNAL OF ENVIRONMENTAL RADIOACTIVITY,162,87-96. |
| MLA | Wang, Qidong,et al."Environmental evolution records reflected by radionuclides in the sediment of coastal wetlands: A case study in the Yellow River Estuary wetland".JOURNAL OF ENVIRONMENTAL RADIOACTIVITY 162(2016):87-96. |
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| 文件名称/大小 | 文献类型 | 版本类型 | 开放类型 | 使用许可 | ||
| Environmental evolut（1523KB） | 期刊论文 | 出版稿 | 限制开放 | CC BY-NC-SA | 浏览 | |
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