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

A O Zheleznova; J Sun; S D Zhu; N V Kuzmenkova; A K Rozhkova; V G Petrov; S Xing; K Shi; X Hou; S N Kalmykov

doi:10.1016/j.jenvrad.2023.107334

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

J Environ Radioact. 2024 Feb:272:107334. doi: 10.1016/j.jenvrad.2023.107334. Epub 2023 Nov 27.

Authors

A O Zheleznova¹, J Sun², S D Zhu², N V Kuzmenkova³, A K Rozhkova⁴, V G Petrov⁵, S Xing², K Shi², X Hou², S N Kalmykov⁵

Affiliations

¹ Department of Chemistry, Lomonosov Moscow State University, Leninskie Gory, 1 Bld.3, Moscow, Russia, 119991. Electronic address: anastasiia.zheleznova@chemistry.msu.ru.
² School of Nuclear Science and Technology, Lanzhou University, Lanzhou, 730000, China.
³ 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.
⁴ 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.
⁵ Department of Chemistry, Lomonosov Moscow State University, Leninskie Gory, 1 Bld.3, Moscow, Russia, 119991.

PMID: 38008046
DOI: 10.1016/j.jenvrad.2023.107334

Abstract

The concentration and sorption behavior of ²³⁷Np 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 ²³⁷Np 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.

Keywords: (237)Np; Bottom sediments; Lake Khanka; Peter the Great Bay; Sea of Japan; Sorption.

MeSH terms

Asia, Eastern
Bays
Environmental Monitoring
Geologic Sediments
Lakes
Neptunium*
Radiation Monitoring*
Water Pollutants, Chemical* / analysis

Substances

Neptunium
Water Pollutants, Chemical