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题名: Sedimentary record of plutonium in the North Yellow Sea and theresponse to catchment environmental changes of inflow rivers
作者: 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
通讯作者: Pan,Shaoming
关键词: Plutonium ;  North Yellow Sea ;  Sediment ;  Isotopic ratio ;  Chronological marker ;  Riverine input
刊名: Chemosphere
发表日期: 2018-09
DOI: 10.1016/j.chemosphere.2018.05.082
卷: 207, 期:2018, 页:130-138
收录类别: SCI
文章类型: 期刊论文
英文摘要: 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.
语种: 英语
所属项目编号: 41671466 ;  41501286 ;  41576043 ;  BK20150578 ;  SKLLQG1624 ;  020914380010 ;  020914380001
项目资助者: National Natural ScienceFoundation of China ;  NaturalScience Foundation of Jiangsu Province ;  OpenFoundation of State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, CAS ;  Fundamental Research Funds for the Central Universities
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内容类型: 期刊论文
URI标识: http://ir.ieecas.cn/handle/361006/5357
Appears in Collections:加速器质谱中心_期刊论文

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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

Recommended Citation:
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.
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文件名: Sedimentary record of plutonium in the North Yellow Sea and the response to catchment environmental changes of inflow rivers.pdf
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