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Vertical distributions and source identification of the radionuclides (PU)-P-239 and Pu-240 in the sediments of the Liao River estuary, China

文献类型：期刊论文

作者Zhang, Kexin1,2; Pan, Shaoming1; Liu, Zhiyong3; Li, Guosheng4; Xu, Yihong1; Hao, Yongpei1
刊名JOURNAL OF ENVIRONMENTAL RADIOACTIVITY
出版日期2018
卷号181页码:78-84
关键词Plutonium Pu-240/Pu-239 atom ratio Tracing study Liao River estuary
ISSN号0265-931X
DOI10.1016/j.jenvrad.2017.10.016
通讯作者Pan, Shaoming(span@nju.edu.cn) ; Li, Guosheng(ligs@igsnrr.ac.cn)
英文摘要Activity concentration of plutonium (Pu) and its isotopic compositions are extensively used for measuring transport processes of Pu and identifying its source. We investigated the spatial distribution characteristics of Pu239+240 activity concentrations and Pu-240/Pu-239 atom ratio in several sediment cores collected from the Liao River coastal zone. Additionally, we calculated the Pu239+240 inventories and based on the (PU)-P-240/Pu-239 atom ratio to trace Pu source. The activity concentrations of Pu239+240 in surface sediments of the Liao River estuary ranged between 0.103 +/- 0.008 and 0.978 +/- 0.035 mBq/g, with an average of 0.294 +/- 0.024 mBq/g. The Pu-239/Pu-240 atom ratios, ranging from 0.173 +/- 0.047 to 0.215 +/- 0.061 (mean: 0.188 +/- 0.049 (la)), were consistent with global fallout value, which indicates the global atmospheric fallout is the main source of Pu in sediment cores from the both sides of Liao River estuary. As for the tidal flat core LT-2, the mean Pu-240/Pu-239 atom ratio, slightly higher than that of the global fallout value, was 0.217 +/- 0.050. Such pattern of Pu isotopic compositions indicated that Pu on the tidal flat in the Liao River estuary is sourced from a combination of global fallout and close-in fall from the PPG by ocean currents transporting. And by using a two end-member mixing model, the results indicate the relative contribution of the PPG close-in fallout to core LT-2 is round 27% and 73% can be attributed to global fallout and river input. Therefore, these results clearly indicate that the direct global fallout is the main source of Pu in the Liao River estuary.
WOS关键词WESTERN NORTHWEST PACIFIC ; PU-240/PU-239 ATOM RATIOS ; PLUTONIUM ISOTOPES ; GLOBAL FALLOUT ; PU ISOTOPES ; LACUSTRINE SEDIMENTS ; SETTLING PARTICLES ; MARSHALL-ISLANDS ; OKINAWA TROUGH ; CS-137
资助项目National Natural Science Foundation of China[41671466] ; National Natural Science Foundation of China[41501286] ; National Natural Science Foundation of China[41271289] ; China Postdoctoral Science Foundation[2017M611922] ; Natural Science Foundation of Jiangsu Province[BK20171292]
WOS研究方向Environmental Sciences & Ecology
语种英语
WOS记录号WOS:000418980900009
出版者ELSEVIER SCI LTD
资助机构National Natural Science Foundation of China ; China Postdoctoral Science Foundation ; Natural Science Foundation of Jiangsu Province
源URL[http://ir.igsnrr.ac.cn/handle/311030/60868]  
专题中国科学院地理科学与资源研究所
通讯作者Pan, Shaoming; Li, Guosheng
作者单位1.Nanjing Univ, Sch Geog & Oceanog Sci, Minist Educ, Key Lab Coastal & Isl Dev, Nanjing 210023, Jiangsu, Peoples R China
2.Yangzhou Univ, Coll Environm Sci & Engn, Yangzhou 225009, Jiangsu, Peoples R China
3.Soochow Univ, Sch Radiat Med & Protect, Suzhou 215123, Peoples R China
4.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China
推荐引用方式
GB/T 7714		 Zhang, Kexin,Pan, Shaoming,Liu, Zhiyong,et al. Vertical distributions and source identification of the radionuclides (PU)-P-239 and Pu-240 in the sediments of the Liao River estuary, China[J]. JOURNAL OF ENVIRONMENTAL RADIOACTIVITY,2018,181:78-84.
APA Zhang, Kexin,Pan, Shaoming,Liu, Zhiyong,Li, Guosheng,Xu, Yihong,&Hao, Yongpei.(2018).Vertical distributions and source identification of the radionuclides (PU)-P-239 and Pu-240 in the sediments of the Liao River estuary, China.JOURNAL OF ENVIRONMENTAL RADIOACTIVITY,181,78-84.
MLA Zhang, Kexin,et al."Vertical distributions and source identification of the radionuclides (PU)-P-239 and Pu-240 in the sediments of the Liao River estuary, China".JOURNAL OF ENVIRONMENTAL RADIOACTIVITY 181(2018):78-84.

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来源：地理科学与资源研究所

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