Permeable reactive barriers based on natural zeolites from Kazakhstan in solving ecological problems: Mathematical model and simulation
- Авторы: Nikashina V.A.1, Serova I.B.1, Kats E.M.1, Tokmachev M.G.2, Toropchenova E.S.1, Zhilkina A.V.1, Kuz’mina T.G.1, Bulenova K.3
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Учреждения:
- Vernadsky Institute of Geochemistry and Analytical Chemistry (GEOKhI)
- Faculty of Physics
- Institute of High Technologies Ltd.
- Выпуск: Том 55, № 1 (2017)
- Страницы: 38-46
- Раздел: Article
- URL: https://journals.rcsi.science/0016-7029/article/view/155398
- DOI: https://doi.org/10.1134/S0016702916130127
- ID: 155398
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Аннотация
In view of ecological problems stemming from the leakage of reservoirs with liquid radioactive wastes (LRW) and groundwater contamination with radioactive Cs+ and Sr2+, we have estimated the physicochemical (including sorption) characteristics of clinoptilolite-bearing tuff (CBT) from the Chankanai deposit in Kazakhstan. Data were obtained on the chemical and phase composition of CBT, its total cationexchange capacity, and equilibrium (exchange isotherms) and kinetic (diffusion coefficients) characteristics in sorbing radioactive Cs+ and Sr2+ from 0.07 n CaCl2 solution (model solutions of groundwaters). We proved that CBT efficiently sorbs Cs from this solution and practically does not sorb Sr and elucidated the reasons for the low selectivity with respect to Sr2+. Based on the equilibrium and kinetic characteristics of the process, a mathematical model is suggested for Cs sorption under dynamic conditions. The protection lifetime of the clinoptilolite-based geochemical barrier is evaluated.
Об авторах
V. Nikashina
Vernadsky Institute of Geochemistry and Analytical Chemistry (GEOKhI)
Автор, ответственный за переписку.
Email: nikashina@geokhi.ru
Россия, ul. Kosygina 19, Moscow, 119991
I. Serova
Vernadsky Institute of Geochemistry and Analytical Chemistry (GEOKhI)
Email: nikashina@geokhi.ru
Россия, ul. Kosygina 19, Moscow, 119991
E. Kats
Vernadsky Institute of Geochemistry and Analytical Chemistry (GEOKhI)
Email: nikashina@geokhi.ru
Россия, ul. Kosygina 19, Moscow, 119991
M. Tokmachev
Faculty of Physics
Email: nikashina@geokhi.ru
Россия, Moscow, 119899
E. Toropchenova
Vernadsky Institute of Geochemistry and Analytical Chemistry (GEOKhI)
Email: nikashina@geokhi.ru
Россия, ul. Kosygina 19, Moscow, 119991
A. Zhilkina
Vernadsky Institute of Geochemistry and Analytical Chemistry (GEOKhI)
Email: nikashina@geokhi.ru
Россия, ul. Kosygina 19, Moscow, 119991
T. Kuz’mina
Vernadsky Institute of Geochemistry and Analytical Chemistry (GEOKhI)
Email: nikashina@geokhi.ru
Россия, ul. Kosygina 19, Moscow, 119991
K. Bulenova
Institute of High Technologies Ltd.
Email: nikashina@geokhi.ru
Казахстан, ul. Bogenbay batyr 168, Almaty, 050012
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