Research output: Contribution to journal › Article › peer-review
Environmental monitoring of low-level radioactive waste disposal in electrochemical plant facilities in Zelenogorsk, Russia. / Boguslavsky, A. E.; Gaskova, O. L.; Naymushina, O. S. et al.
In: Applied Geochemistry, Vol. 119, 104598, 01.08.2020.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - Environmental monitoring of low-level radioactive waste disposal in electrochemical plant facilities in Zelenogorsk, Russia
AU - Boguslavsky, A. E.
AU - Gaskova, O. L.
AU - Naymushina, O. S.
AU - Popova, N. M.
AU - Safonov, A. V.
N1 - Publisher Copyright: © 2020 Elsevier Ltd Copyright: Copyright 2020 Elsevier B.V., All rights reserved.
PY - 2020/8/1
Y1 - 2020/8/1
N2 - The concentrations of radionuclides, especially anions, in water can substantially exceed local background levels in the vicinity of former and currently operating uranium enrichment plants. In this study, we present new data on environmental monitoring near the uranium sludge collector of an electrochemical plant (ECP) in Krasnoyarsk Krai, Russia. We first tracked the complex biogeochemical processes that can affect the fate and transport of U in highly nitrate-polluted ground- and surface water. We described the main mechanisms of U immobilization: (a) biogenic and abiogenic reduction (microbial nitrate reduction caused dramatically Eh decrease), (b) sorption by organic matter in peat and by microbial biofilms on a sandy rock surface, and (c) precipitation with biogenic and abiogenic phases. The intensity of the biogenic and abiogenic factors depended on the dynamics of changes in the oxidation-reduction potential (ORP)-pH conditions as well as organic- and inorganic anion concentrations with distance from the source of pollution. Anammox bacteria were found in areas with high nitrate pollution, and we believe that they played a key role in lithotrophic nitrogen consumption and primary organic production. These data can form the basis for complex groundwater remediations close to U sludge repositories and can be implemented beyond the ECP site itself.
AB - The concentrations of radionuclides, especially anions, in water can substantially exceed local background levels in the vicinity of former and currently operating uranium enrichment plants. In this study, we present new data on environmental monitoring near the uranium sludge collector of an electrochemical plant (ECP) in Krasnoyarsk Krai, Russia. We first tracked the complex biogeochemical processes that can affect the fate and transport of U in highly nitrate-polluted ground- and surface water. We described the main mechanisms of U immobilization: (a) biogenic and abiogenic reduction (microbial nitrate reduction caused dramatically Eh decrease), (b) sorption by organic matter in peat and by microbial biofilms on a sandy rock surface, and (c) precipitation with biogenic and abiogenic phases. The intensity of the biogenic and abiogenic factors depended on the dynamics of changes in the oxidation-reduction potential (ORP)-pH conditions as well as organic- and inorganic anion concentrations with distance from the source of pollution. Anammox bacteria were found in areas with high nitrate pollution, and we believe that they played a key role in lithotrophic nitrogen consumption and primary organic production. These data can form the basis for complex groundwater remediations close to U sludge repositories and can be implemented beyond the ECP site itself.
KW - Groundwater
KW - Microbiological activity
KW - Sorption
KW - Thermodynamic modeling
KW - Uranium
KW - Waste disposal
KW - URANIUM
KW - MIGRATION
KW - U(VI)
KW - ADSORPTION
KW - MICROBIAL REDUCTION
KW - SPECIATION
KW - ACTINIDES
KW - NATURAL-WATERS
KW - BIOGENIC FACTORS
KW - GROUNDWATER
UR - http://www.scopus.com/inward/record.url?scp=85086731922&partnerID=8YFLogxK
U2 - 10.1016/j.apgeochem.2020.104598
DO - 10.1016/j.apgeochem.2020.104598
M3 - Article
AN - SCOPUS:85086731922
VL - 119
JO - Applied Geochemistry
JF - Applied Geochemistry
SN - 0883-2927
M1 - 104598
ER -
ID: 24568129