Radioecological monitoring of transboundary rivers of the Central Asian Region

Yuldashev, B. S.; Салихбаев, У. С.; Kist, A. A.; Radyuk, R. I.; Barber, David S.; Passell, Howard David; Betsill, Jeffrey David; Matthews, Ronald C.; Vdovina, E. D.; Zhuk, L. I.; Solodukhin, V. P.; Poznyak, V. L.; Vasiliev, Iuliana; Alekhina, V. M.; Djuraev, A.A.

doi:10.1007/s10967-005-0040-2

Cited by 13 publications

(6 citation statements)

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“…Sampling of soil, bottom sediment and water was performed in compliance with the procedures developed in the course of our previous work in 2000-2010 within the international project ''Navruz'' [4][5][6][7].…”

Section: Methodsmentioning

confidence: 99%

“…Instrumental gamma-spectrometry (IGS) was used for determination of the samples' radionuclide composition; neutron activation analysis (NAA), X-ray fluorescence analysis (XRF) and the inductively coupled plasma mass spectrometry (ICP-MS) methods were used in our studies of element composition in the taken samples [4][5][6][7][9][10][11].…”

Section: Methodsmentioning

confidence: 99%

“…More details of the procedures in the field and laboratory investigations are presented in [4][5][6][7][9][10][11].…”

Section: Neutron Activation Analysis (Naa)mentioning

confidence: 99%

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Radionuclides and toxic chemical elements in the transboundary Kyrgyzstan–Kazakhstan rivers

Solodukhin

Poznyak

Kabirova

et al. 2016

J Radioanal Nucl Chem

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The paper presents the results of radiation surveying and determination of radionuclide and elemental composition in water objects (soil, bottom sediments, water) of the transboundary rivers Shu, Shor-Koo, Aksu, Karabalta, Toktas as well as of Tasotkel water-storage in Kazakhstan in vicinity of the border with Kyrgyzstan. Increased contents of natural radionuclides of 238 U and 232 Th series, As, Co, Cs, Cu, Hf, Mo, Pb, Sb, Sc, Zn, Zr and rare earth elements were observed in soil and bottom sediment samples. Increased contents of the following toxic elements were revealed in water samples: B, As, Mo, Ba, U. Negative influence of radiation-hazardous sites in Kyrgyzstan on the contamination of the transboundary rivers with natural radionuclides and toxic elements was revealed.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

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Radionuclides and toxic chemical elements in the transboundary Kyrgyzstan–Kazakhstan rivers

Solodukhin

Poznyak

Kabirova

et al. 2016

J Radioanal Nucl Chem

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“…Previous studies performed within the Cooperative Transboundary Monitoring Data Sharing and Modeling of Water Resources in Central Asia (NAVRUZ) project [5] have evidenced increased gamma-ray activity along the Varzob River at the confluence of the Sioma and Varzob rivers [6,7]. This finding was analyzed by taking into account the existence of a significant number of former post-Soviet era uranium mines, mainly located in the northern Tajikistan ridges as well in the other neighboring mountainous regions of Central Asian states [8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Geochemical and Isotope Anomalies in Sioma River Gorge, Western Tajikistan

et al. 2021

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For a better understanding of the previously observed increased natural radioactivity at the confluence of the Varzob and Sioma rivers, Central Tajikistan, the activity concentration of natural radioactive 40K, Th and U daughters as well as of the anthropogenic 137Cs were determined in nine locations covering the entire Sioma River. The radiometric determinations evidenced, in addition to increased activity concentrations of Th and U daughter radionuclides, an anomalous accumulation of anthropic 137Cs and natural 210Pb in the middle of the Sioma gorge. Complementarily, the mass fractions of natural Th and U determined by instrumental neutron activation analysis evidenced an increased presence of Th and U, which, in some places, overpasses six-times the average mass fraction found in the upper continental crust. The possible influence of active air transport from the southern Tadjik plane during the Afghani storms, as well as the presence of actinide-rich minerals, were analyzed and discussed.

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“…The presence of radionuclides in Central Asian Rivers drew attention of scientists due to the history of radioecological problems in the former USSR. The three-year Navruz project was designed to bring together Kazakh, Uzbek, Tajik and Kyrgyz scientists to perform radioecological monitoring of Syrdarya and Amudarya rivers (Yuldashev et al, 2002;Yuldashev et al, 2005). The analysis of transboundary radionuclide contamination of Syrdarya was based on water samples from 60 monitoring sites (15 in each country) and analyzed for radiation readings, 71 radionuclides and heavy metals (Barber et al, 2005).…”

Section: Introductionmentioning

confidence: 99%

Twelve-Year Monitoring Results of Radioactive Pollution in the Kazakh Part of the Syrdarya River Basin

Zhanbekov¹,

Akhmetov²,

Vundo³

et al. 2018

Environ. Nat. Resource. J.

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Assessment of radioactive pollution of the Syrdarya river was carried out. A large number of water samples were collected over a twelve-year period from three zones: upstream of uranium mines; around uranium mines; and downstream of the mines. Samples were analyzed for gross α-, β-activity and radionuclide concentrations. Gross α-activity exceeded the permissible level in almost every water sample. Both gross α-and β-activity in Baigekum village and PV-1 mine significantly exceeded safe levels throughout entire monitoring period. Concentrations of 230 Th and 210 Pb surpassed the national intervention levels in almost all water samples. In a number of samples from Baigekum village excessive concentration of 226 Ra was observed. Furthermore, water samples collected from Tabakbulak in the spring of 2009 had extremely high levels of radionuclides. In general, elevated levels of radionuclides had been observed around the uranium mines and down the stream of Syrdarya since 2008-2009 when industrial-level production started at Zarechnoye, Khorasan and Irkol uranium deposits. The results suggest that radioactive pollution of Syrdarya in Kazakhstan is primarily caused by uranium mining activities. It is likely that the Syrdarya waters are not only unpalatable for human, but it may also not be suitable for household and agricultural use due to radioactive pollution.

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Radioecological monitoring of transboundary rivers of the Central Asian Region

Cited by 13 publications

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Radionuclides and toxic chemical elements in the transboundary Kyrgyzstan–Kazakhstan rivers

Radionuclides and toxic chemical elements in the transboundary Kyrgyzstan–Kazakhstan rivers

Geochemical and Isotope Anomalies in Sioma River Gorge, Western Tajikistan

Twelve-Year Monitoring Results of Radioactive Pollution in the Kazakh Part of the Syrdarya River Basin

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