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Sedimentary record of plutonium in the North Yellow Sea and theresponse to catchment environmental changes of inflow rivers
Xu,YH(Xu,Yihong)1; Pan,SM(Pan,Shaoming)1; Gao,JH(Gao,Jianhua)1; Hou,XL(Hou,Xiaolin)2,3; Ma,YF(Ma,Yongfu)4; Hao,YP(Hao,Yongpei)1; Pan,Shaoming
2018-09
发表期刊Chemosphere
卷号207期号:2018页码:130-138
文章类型期刊论文
摘要Plutonium (Pu) isotopes were first determined in surface and core sediment samples collected from the northern North Yellow Sea (NYS) to elucidate their source terms and deposition process as well as the response to catchment environmental changes of inflow rivers. 240Pu/239Pu atom ratios in all sediments showed the typical global fallout value of ∼0.18 without any influences from the nuclear weapons tests conducted recently in the North Korea or early in the Pacific Proving Ground. The large variation of 239+240Pu activities (0.022-0.515 mBq/g) observed in surface sediments should be mainly attributed to the re-suspension and transportation of fine sediments influenced by the Liaonan Costal Current. Based on the two 239+249Pu depth profiles with easily observed onset fallout levels (1952) and global fallout peaks (1963), 239+240Pu served as a valid time mark in the coastal sedimentary system. Riverine input Pu contributed only 15-27% to the total global fallout inventory (92.5-108.8 Bq/m2) in the northern NYS, much lower than that in the Yangtze River estuary (77-80%), indicating a better soil conservation in the northeast China due to higher forest coverage compared to the Yangtze River's drainage basin. The increase of riverine input Pu after 1980s reflected the more intense soil erosion degree caused by the land use and cover change due to the increment of human activities in the northeast China at the same period. Our results demonstrated that plutonium is a good indicator for studying sedimentary process and its response to the environment in the coastal area.
关键词Plutonium North Yellow Sea Sediment Isotopic Ratio Chronological Marker Riverine Input
DOI10.1016/j.chemosphere.2018.05.082
收录类别SCI
所属项目编号41671466 ; 41501286 ; 41576043 ; BK20150578 ; SKLLQG1624 ; 020914380010 ; 020914380001
语种英语
项目资助者National Natural ScienceFoundation of China ; National Natural ScienceFoundation of China ; NaturalScience Foundation of Jiangsu Province ; NaturalScience Foundation of Jiangsu Province ; OpenFoundation of State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, CAS ; OpenFoundation of State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, CAS ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities
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被引频次:1[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ieecas.cn/handle/361006/5357
专题加速器质谱中心
通讯作者Pan,Shaoming
作者单位1.The Key Laboratory of Coastal and Island Development of Ministry of Education, School of Geographic and Oceanographic Sciences, Nanjing University,Nanjing 210023, China
2.Center for Nuclear Technologies, Technical University of Denmark, Risø Campus, DK-4000 Roskilde, Denmark
3.Xi'an AMS Center, SKLLQG, Institute of Earth Environment, CAS, Xi'an 710061, China
4.The Key Laboratory of Environmental Radiation Monitoring of Ministry of Environmental Protection, Radiation Monitoring Department, EnvironmentalRadiation Monitoring Technical Center of Ministry of Environmental Protection, Hangzhou 310012, China
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Xu,YH,Pan,SM,Gao,JH,et al. Sedimentary record of plutonium in the North Yellow Sea and theresponse to catchment environmental changes of inflow rivers[J]. Chemosphere,2018,207(2018):130-138.
APA Xu,YH.,Pan,SM.,Gao,JH.,Hou,XL.,Ma,YF.,...&Pan,Shaoming.(2018).Sedimentary record of plutonium in the North Yellow Sea and theresponse to catchment environmental changes of inflow rivers.Chemosphere,207(2018),130-138.
MLA Xu,YH,et al."Sedimentary record of plutonium in the North Yellow Sea and theresponse to catchment environmental changes of inflow rivers".Chemosphere 207.2018(2018):130-138.
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