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2022 Vol. 37, No. 2
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LI Peihua, WU Xiao, BI Naishuang, WANG Houjie. Seasonal variation of radionuclides in surface sediments off the east coast of Shandong Peninsula and its environmental implications[J]. Marine Geology Frontiers, 2022, 38(2): 37-47. doi: 10.16028/j.1009-2722.2020.112
Citation: LI Peihua, WU Xiao, BI Naishuang, WANG Houjie. Seasonal variation of radionuclides in surface sediments off the east coast of Shandong Peninsula and its environmental implications[J]. Marine Geology Frontiers, 2022, 38(2): 37-47. doi: 10.16028/j.1009-2722.2020.112
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Seasonal variation of radionuclides in surface sediments off the east coast of Shandong Peninsula and its environmental implications

  • 1.

    College of Marine Geosciences, Ocean University of China, Qingdao 266100, China

  • 2.

    Key Laboratory of Submarine Geosciences and Technology of Ministry of Education, Qingdao 266100, China

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Received Date:  27 July 2020
Accepted Date:  30 November 2021
Publish Date:  28 February 2022
    Abstract

  • Surface sediment samples were collected off the east coast of Shandong Peninsula in April, July, October and December of 2019 respectively. Radionuclides 7Be, 210Pbex, 228Thex and 137Cs of the surface sediments are analysed and discussed for different seasons. The results suggest that the seasonal distributions of 7Be and 228Thex are different from 210Pbex and 137Cs at same station, and the seasonal distribution of the same radionuclide vary from station to station. The variations of radionuclides seem to have nothing to do with the grain size of surface sediments. The seasonal variations of 7Be and 228Thex are significantly affected by the transport and settlement of suspended matter, while 210Pbex and 137Cs are more closely related to sediment redistribution. Comparing to the station H02, the changes of radionuclides in surface sediments at the station H01 are less affected by atmospheric sedimentation. H01 and H02 are located in different parts of the omega-shaped (Ω) mud deposits, owing to different sediment sources and dynamic environments. The study results further confirm that 7Be、210Pbex、228Thex and 137Cs are good tracers for illustrating sediment transport and deposition.

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