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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
2016-10-01
发表期刊JOURNAL OF ENVIRONMENTAL RADIOACTIVITY
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
DOI10.1016/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
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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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