Volume 42 Issue 8
Aug.  2023
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Yancheng Wang, Guangquan Chen, Hongjun Yu, Xingyong Xu, Yinqiao Zou, Wenqing Zhao, Weitao Han, Wenzhe Lyu, Zhen Cui, Runtian Ding. Simulation of transport mechanism of radium isotopes in aquifer on the southern coast of Laizhou Bay[J]. Acta Oceanologica Sinica, 2023, 42(8): 40-48. doi: 10.1007/s13131-022-2096-z
Citation: Yancheng Wang, Guangquan Chen, Hongjun Yu, Xingyong Xu, Yinqiao Zou, Wenqing Zhao, Weitao Han, Wenzhe Lyu, Zhen Cui, Runtian Ding. Simulation of transport mechanism of radium isotopes in aquifer on the southern coast of Laizhou Bay[J]. Acta Oceanologica Sinica, 2023, 42(8): 40-48. doi: 10.1007/s13131-022-2096-z

Simulation of transport mechanism of radium isotopes in aquifer on the southern coast of Laizhou Bay

doi: 10.1007/s13131-022-2096-z
Funds:  The Joint Funds of the National Natural Science Foundation of China under contract Nos U22A20580 and U2106203; the National Natural Science Foundation of China under contract No. 41706067; the Open Project Program of Key Laboratory of Ecological Warning, Protection & Restoration for Bohai Sea, Ministry of Natural Resources under contract No. 2022108.
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  • Corresponding author: E-mail: chenguangquan@fio.org.cn
  • Received Date: 2022-12-16
  • Accepted Date: 2023-03-11
  • Available Online: 2023-05-09
  • Publish Date: 2023-08-31
  • Naturally occurring radium (223Ra, 224Ra, 226Ra, and 228Ra) isotopes have been widely applied as geochemical tracers in marine environments, especially when estimating the submarine groundwater discharge (SGD). In this sense, the influencing factors and transport mechanism of radium isotope activity in aquifers can be key information for SGD estimation. This work evaluates the adsorption/desorption behavior of 224Ra and 226Ra in the solid-liquid phase through a leaching experiment and analysis of field data. The results suggested that radium isotope activity was positively correlated with salinity and grain size, in the case of abundant sediments. Through ion analysis, we found that the ions (Na+, Ca2+, Mg2+, and Ba2+) exchanged with radium isotopes in the process of transport. A 1-D reactive transport model was established to simulate the transport process of radium isotope in aquifers. The model successfully simulated the variation of radium isotope desorption activity with salinity and was subsequently verified in the field. This study contributes to the understanding of the geochemical behavior of radium isotopes in aquifers and provides guidance for selecting a suitable groundwater endmember in SGD estimation.
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