首页|Using Natural Radionuclides to Trace Sources of Suspended Particles in the Lower Reaches of the Yellow River

Using Natural Radionuclides to Trace Sources of Suspended Particles in the Lower Reaches of the Yellow River

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Natural radionuclides are powerful tools for understanding the sources and fate of suspended particulate matter(SPM).Particulate matter with different particle sizes behaves differently with respect to adsorption and desorption.We analyzed the activi-ties and distribution characteristics of multiple natural radionuclides(238U,226Ra,40K,228Ra,7Be and 210Pbex)on size-fractionated SPM at the Lijin Hydrographic Station(Huanghe or Yellow River)every month over a one-year period.Results showed that medium silt(16-32 µm)was the main component.As expected,the activity of each radionuclide decreased with an increase of particle size.We examined the sources of SPM with different particle sizes using activity ratios of 226Ra/238U,228Ra/226Ra,40K/238U and 7Be/210Pbex,and concluded that SPM with different particle sizes originated from different sources.Our results indicate that fine SPM(<32 µm)was mainly from the erosion of soil along the lower reaches of the Yellow River,while coarse SPM(>32 µm)was mainly derived from resuspension of riverbed sediment.During high runoff periods,the concentration of SPM increased significantly,and the pro-portion of fine particles originating upstream increased.Naturally occurring radioactive isotopes,especially on size-fractionated par-ticles,are therefore seen as useful tracers to understand the sources and behaviors of riverine particles transported from land to sea.

the Yellow Riversuspended particulate mattersize-fractionsradionuclidessediment sourceswater elutriator

ZHANG Han、BURNETT C.William、ZHANG Xiaojie、ZHAO Shibin、YANG Disong、NAN Haiming、YU Zhigang、XU Bochao

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Frontiers Science Center for Deep Ocean Multispheres and Earth System,and Key Laboratory of Marine Chemistry Theory and Technology,Ministry of Education,Ocean University of China,Qingdao 266100,China

Laboratory for Marine Ecology and Environmental Science,Qingdao National Laboratory for Marine Science and Technology,Qingdao 266071,China

College of Chemistry and Chemical Engineering,Ocean University of China,Qingdao 266100,China

Department of Earth,Ocean and Atmospheric Science,Florida State University,Tallahassee,FL 32306,USA

North China Sea Environmental Monitoring Center,State Oceanic Administration,Key Laboratory of Ecological Prewarning and Protection of Bohai Sea,MNR,Qingdao 266033,China

Shandong Provincial Key Laboratory of Marine Ecological Environment and Disaster Prevention and Mitigation,Qingdao 266033,China

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National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaFundamental Research Funds for the Central Universities

U22A2058042130410U1906210201962003

2024

10.1007/s11802-024-5482-7

中国海洋大学学报(自然科学英文版)
中国海洋大学

中国海洋大学学报(自然科学英文版)

CSTPCD
影响因子：0.268
ISSN：1672-5182
年,卷(期)：2024.23(1)
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