Sorption behaviour of neptunium in marine and fresh water bottom sediments in Far East area of Russia (Lake Khanka and Amur Bay).

Autor: Zheleznova AO; Department of Chemistry, Lomonosov Moscow State University, Leninskie Gory, 1 Bld.3, Moscow, Russia, 119991. Electronic address: anastasiia.zheleznova@chemistry.msu.ru., Sun J; School of Nuclear Science and Technology, Lanzhou University, Lanzhou, 730000, China., Zhu SD; School of Nuclear Science and Technology, Lanzhou University, Lanzhou, 730000, China., Kuzmenkova NV; Department of Chemistry, Lomonosov Moscow State University, Leninskie Gory, 1 Bld.3, Moscow, Russia, 119991; Institute of Geography, RAS, Staromonetny Per. 29, Bld. 4, Moscow, Russia., Rozhkova AK; Department of Chemistry, Lomonosov Moscow State University, Leninskie Gory, 1 Bld.3, Moscow, Russia, 119991; Vernadsky Institute of Geochemistry and Analytical Chemistry, RAS, St. Kosygin 19, Moscow, Russia, 119991., Petrov VG; Department of Chemistry, Lomonosov Moscow State University, Leninskie Gory, 1 Bld.3, Moscow, Russia, 119991., Xing S; School of Nuclear Science and Technology, Lanzhou University, Lanzhou, 730000, China., Shi K; School of Nuclear Science and Technology, Lanzhou University, Lanzhou, 730000, China., Hou X; School of Nuclear Science and Technology, Lanzhou University, Lanzhou, 730000, China., Kalmykov SN; Department of Chemistry, Lomonosov Moscow State University, Leninskie Gory, 1 Bld.3, Moscow, Russia, 119991.
Jazyk: angličtina
Zdroj: Journal of environmental radioactivity [J Environ Radioact] 2024 Feb; Vol. 272, pp. 107334. Date of Electronic Publication: 2023 Nov 27.
DOI: 10.1016/j.jenvrad.2023.107334
Abstrakt: The concentration and sorption behavior of 237 Np on the bottom sediments of water bodies in the Far East region of Russia (Lake Khanka and Peter the Great Bay) were studied for the first time. The 237 Np concentrations vary from 1.06 × 10 -6 to 4.43 × 10 -5 mBq g -1 in the bottom sediments of Lake Khanka and from 1.05 × 10 -4 to 2.52 × 10 -3 mBq g -1 for Amur Bay. The experiment on the adsorption of Np on marine and lake sediment showed that it is sorbed through complexation with silicates (albite, leucite). The Np sorption isotherm on marine sediments is described by the Langmuir equation; the distribution coefficients (Kd) of Np vary from 57 to 588 mL g -1 . For lake sediments, the isotherm is described by the Henry equation; the Kd value reaches 935 mL g -1 .
Competing Interests: Declaration of competing interest The authors declare the following financial interests/personal relationships which may be considered as potential competing interests: Kuzmenkova Natalia reports financial support was provided by Russian Science Foundation. Hou Xiaolin reports financial support was provided by National Natural Science Foundation of China. Co-author is an assocaited editor in Journal of Environmental radioactivity.
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Databáze: MEDLINE
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