TY - JOUR

T1 - Monitoring of radionuclides in the natural waters of Novosibirsk, Russia

AU - Novikov, D. A.

AU - Dultsev, F. F.

AU - Sukhorukova, A. F.

AU - Maksimova, A. A.

AU - Chernykh, A. V.

AU - Derkachyov, A. S.

N1 - Funding Information: The research was conducted with the financial support from the Fundamental Research Program of the Russian Academy of Science (Project No. 0331-2019-0025 ″Geochemistry, origin and mechanisms of formation of groundwater composition in Arctic regions of Siberian sedimentary basins”), the Russian Foundation for Basic Research and the Government of the Novosibirsk Region within the Research Project No. 19-45-540004. Publisher Copyright: © 2021 Elsevier B.V.

PY - 2021/11

Y1 - 2021/11

N2 - Results of the investigation of 238U, 232Th, 226Ra and 222Rn content in the natural waters of Novosibirsk city and adjacent territories are presented for the first time. Hydraulic interrelations between the aquifer systems of Quaternary, Neogene and Paleogene sediments, Upper Devonian – Lower Carboniferous sediments and Upper Paleozoic granites predetermined the features of hydrogeological structure. Twenty-five chemical types of water were established, with the domination of HCO3 Mg–Ca, HCO3 Na–Mg–Ca and SO4–HCO3 Na–Mg–Ca. The amount of total dissolved solids varies from 127 to 1848 mg l−1, pH from neutral to alkaline (6.9–9.5). The values of Eh vary from reductive −157 mV (O2dissolved = 0.3 mg l−1) to oxidative +280 mV (O2dissolved = 19.4 mg l−1). Silicon content varies from 0,14 to 11,77 mg l−1. The ranges within which the concentrations of radioactive elements vary in natural waters are: radon (222Rn) 0–1216 Bq.l−1, uranium (238U) 9.75∙10−8 – 0.098 mg l−1, thorium (232Th) 2.2∙10−7 – 2.1∙10−3 and radium (226Ra) 1.6∙10−12 – 3,5∙10−7 mg l−1. The maximal content of these elements in the waters of boundary territories reach 222Rn – 43,764 Bq.l−1, 238U–6.5 mg l−1 and 226Ra – 3.7∙10−7 mg l−1. The 232Th/238U ratio is 4.20∙10−5 – 2.96. The concentrations of uranium and thorium in the geological objects of Novosibirsk vary within the ranges (mg.kg−1): 238U = 1.6–3.6 and 232Th = 5.55–13.6 for sedimentary rocks, and 238U = 0.2–47.2 and 232Th = 0.8–44.1 in intrusive formations. It is established that waters with high radon content relate to the aquiferous zones of Upper Devonian - Lower Carboniferous shale rocks and hornfels, as well as Upper Paleozoic granites. The highest concentrations of radionuclides are characteristic of the aqueous scattering halos of the uranium ore deposit.

AB - Results of the investigation of 238U, 232Th, 226Ra and 222Rn content in the natural waters of Novosibirsk city and adjacent territories are presented for the first time. Hydraulic interrelations between the aquifer systems of Quaternary, Neogene and Paleogene sediments, Upper Devonian – Lower Carboniferous sediments and Upper Paleozoic granites predetermined the features of hydrogeological structure. Twenty-five chemical types of water were established, with the domination of HCO3 Mg–Ca, HCO3 Na–Mg–Ca and SO4–HCO3 Na–Mg–Ca. The amount of total dissolved solids varies from 127 to 1848 mg l−1, pH from neutral to alkaline (6.9–9.5). The values of Eh vary from reductive −157 mV (O2dissolved = 0.3 mg l−1) to oxidative +280 mV (O2dissolved = 19.4 mg l−1). Silicon content varies from 0,14 to 11,77 mg l−1. The ranges within which the concentrations of radioactive elements vary in natural waters are: radon (222Rn) 0–1216 Bq.l−1, uranium (238U) 9.75∙10−8 – 0.098 mg l−1, thorium (232Th) 2.2∙10−7 – 2.1∙10−3 and radium (226Ra) 1.6∙10−12 – 3,5∙10−7 mg l−1. The maximal content of these elements in the waters of boundary territories reach 222Rn – 43,764 Bq.l−1, 238U–6.5 mg l−1 and 226Ra – 3.7∙10−7 mg l−1. The 232Th/238U ratio is 4.20∙10−5 – 2.96. The concentrations of uranium and thorium in the geological objects of Novosibirsk vary within the ranges (mg.kg−1): 238U = 1.6–3.6 and 232Th = 5.55–13.6 for sedimentary rocks, and 238U = 0.2–47.2 and 232Th = 0.8–44.1 in intrusive formations. It is established that waters with high radon content relate to the aquiferous zones of Upper Devonian - Lower Carboniferous shale rocks and hornfels, as well as Upper Paleozoic granites. The highest concentrations of radionuclides are characteristic of the aqueous scattering halos of the uranium ore deposit.

KW - Granites

KW - Hydrogeochemistry

KW - Novosibirsk

KW - Radium-226

KW - Radon-222

KW - Uranium-238

UR - http://www.scopus.com/inward/record.url?scp=85122678396&partnerID=8YFLogxK

UR - https://www.elibrary.ru/item.asp?id=48127753

U2 - 10.1016/j.gsd.2021.100674

DO - 10.1016/j.gsd.2021.100674

M3 - Article

AN - SCOPUS:85122678396

VL - 15

JO - Groundwater for Sustainable Development

JF - Groundwater for Sustainable Development

SN - 2352-801X

M1 - 100674

ER -