The results of long-term simultaneous measurements of radon exhalation rate, radon concentrations in soil gas and groundwater in the fault zone.

Autor: Miklyaev PS; Sergeev Institute of Environmental Geoscience Russian Academy of Sciences (IEG RAS), Ulansky per. 13 build. 2, 101000, Moscow, Russia. Electronic address: peterm7@inbox.ru., Petrova TB; Lomonosov Moscow State University, Faculty of Chemistry, Department of Radiochemistry, Leninskie Gory 1 build. 3, GSP-1, 119991, Moscow, Russia. Electronic address: tbp111@inbox.ru., Shchitov DV; North Caucasus Federal University, Pyatigorsk Branch, Engineering Faculty, Department of Construction, Ermolov Str., 46a, 357500, Pyatigorsk, Russia. Electronic address: skfu.pgs@gmail.com., Sidyakin PA; North Caucasus Federal University, Pyatigorsk Branch, Engineering Faculty, Department of Construction, Ermolov Str., 46a, 357500, Pyatigorsk, Russia. Electronic address: sidyakin_74@mail.ru., Murzabekov MА; North Caucasus Federal University, Pyatigorsk Branch, Engineering Faculty, Department of Construction, Ermolov Str., 46a, 357500, Pyatigorsk, Russia. Electronic address: murzabekov007@mail.ru., Marennyy AM; Federal State Unitary Enterprise Research and Technical Center of Radiation-Chemical Safety and Hygiene, Shchukinskaya ul. 40, 123182, Moscow, Russia. Electronic address: amarennyy@yandex.ru., Nefedov NA; Federal State Unitary Enterprise Research and Technical Center of Radiation-Chemical Safety and Hygiene, Shchukinskaya ul. 40, 123182, Moscow, Russia. Electronic address: nanef@rambler.ru., Sapozhnikov YA; Lomonosov Moscow State University, Faculty of Chemistry, Department of Radiochemistry, Leninskie Gory 1 build. 3, GSP-1, 119991, Moscow, Russia. Electronic address: yas34@mail.ru.
Jazyk: angličtina
Zdroj: Applied radiation and isotopes : including data, instrumentation and methods for use in agriculture, industry and medicine [Appl Radiat Isot] 2021 Jan; Vol. 167, pp. 109460. Date of Electronic Publication: 2020 Oct 03.
DOI: 10.1016/j.apradiso.2020.109460
Abstrakt: The regular monthly radon measurements were carried out in the fault zone on the Western slope of the Beshtau magmatic massif (North Caucasus). The radon exhalation rate from the soil surface, as well as radon concentrations in soil gas at a depth of 0.5 m and in groundwater discharged at a spring located nearby have simultaneously been measured. High seasonal fluctuations in radon exhalation and radon concentration in soil gas, characterized by highs in summer and lows in winter, were registered. In summer, the radon exhalation reached 23.8 Bq m -2 s -1 , and the radon concentration in the soil gas reached 166 kBq m -3 . In winter, both the radon exhalation and the radon concentration in the soil dropped to 0.025 Bq m -2 s -1 and <3 kBq m -3 , respectively. The concentration of radon in ground water varied over the year in a relatively narrow range (100-210 Bq l -1 ), and there were no seasonal fluctuations. A sharp increase in soil radon and radon exhalation in spring and a fall in autumn are timed to the moments when the temperature of the atmospheric air becomes, respectively, higher and lower than the temperature of the rock massif. Both the soil radon concentration and the radon exhalation show a close correlation with the temperature of atmospheric air, but in the first case the relationship is linear, and in the second - exponential. The obtained data confirm the assumption that the seasonal radon variations are caused by atmospheric air circulation in the shallow area of the fault due to the temperature difference between the atmosphere and the rock massif.
(Copyright © 2020 Elsevier Ltd. All rights reserved.)
Databáze: MEDLINE
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