Biomonitoring of environmental pollution by thorium and uranium in selected regions of the Republic of Kazakhstan

Zoriy, P.; Ostapczuk, P.; Dederichs, H.; Höbig, Jürgen; Lennartz, R.; Zoriy, Miroslav

doi:10.1016/j.jenvrad.2010.02.014

Cited by 27 publications

(4 citation statements)

References 25 publications

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“…Nevertheless, thorium can be harmful and has been shown to damage the liver function of mice (Kumar et al, 2008). In addition to the natural occurrence of uranium and thorium, human activities such as uranium mining have left a legacy of contamination of soils and groundwater (Hu et al, 2010;Zoriy et al, 2010). The world's boreal forest region have not escaped such disturbances.…”

Section: Introductionmentioning

confidence: 99%

Landscape control of uranium and thorium in boreal streams – spatiotemporal variability and the role of wetlands

2012

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The concentrations of uranium and thorium in ten partly nested streams in the boreal forest region were monitored over a two-year period. The investigated catchments ranged from small headwaters (0.1 km2) up to a fourth-order stream (67 km2). Considerable spatiotemporal variations were observed, with little or no correlation between streams. The fluxes of both uranium and thorium varied substantially between the subcatchments, ranging from 1.7 to 30 g km−2 a−1 for uranium and from 3.2 to 24 g km−2 a−1 for thorium. Airborne gamma spectrometry was used to measure the concentrations of uranium and thorium in surface soils throughout the catchment, suggesting that the concentrations of uranium and thorium in mineral soils are similar throughout the catchment. The fluxes of uranium and thorium were compared to a wide range of parameters characterising the investigated catchments and the chemistry of the stream water, e.g. soil concentrations of these elements, pH, TOC (total organic carbon), Al, Si and hydrogen carbonate, but it was concluded that the spatial variabilities in the fluxes of both uranium and thorium mainly were controlled by wetlands. The results indicate that there is a predictable and systematic accumulation of both uranium and thorium in boreal wetlands that is large enough to control the transport of these elements. On the landscape scale approximately 65–80% of uranium and 55–65% of thorium entering a wetland were estimated to be retained in the peat. Overall, accumulation in mires and other types of wetlands was estimated to decrease the fluxes of uranium and thorium from the boreal forest landscape by 30–40%, indicating that wetlands play an important role for the biogeochemical cycling of uranium and thorium in the boreal forest landscape. The atmospheric deposition of uranium and thorium was also quantified, and its contribution to boreal streams was found to be low compared to weathering

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Section: Introductionmentioning

confidence: 99%

Landscape control of uranium and thorium in boreal streams – spatiotemporal variability and the role of wetlands

2012

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“…Since uranium has been signicantly enriched and widely used in nuclear energy generation and nuclear weapons, human beings have a high chance of being exposed to the circumstance of uranium, which can cause long-term health damage. [4][5][6] Assessment of contamination condition of uranium and monitoring of the environmental remediation requires a simple and portable method for onsite and real-time detection of uranium. At present, many techniques have been developed for routine uranium detection, including X-ray uorescence spectroscopy, 7 inductively coupled plasma atomic emission spectroscopy (ICP-AES), 8 high-performance liquid chromatography (HPLC), 9 and mass spectrometry (MS).…”

Section: Introductionmentioning

confidence: 99%

Ultrasensitive electrochemical detection of UO₂²⁺ based on DNAzyme and isothermal enzyme-free amplification

et al. 2016

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“…In mining, the uranium and its decay products buried deep in the earth are brought to the surface, and the rock containing them is crushed into fine sand. After the uranium is chemically removed, the sand is stored in huge reservoirs [ 17 ]. Conservation and liquidation of uranium deposits in northern Kazakhstan was completed in 2008 in accordance with the State program “Preservation of non-uranium mining enterprises and liquidation of the consequences of uranium deposits for 2001-2010” [ 18 ].…”

Section: Introductionmentioning

confidence: 99%

The health effects of radon and uranium on the population of Kazakhstan

Bersimbaev

Bulgakova

2015

Genes and Environ

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The radioactive contamination is a significant factor affecting the environment and human health. Radon and its decay products are the major contributors to human exposure from natural radiation sources. World Health Organization has identified the chronic residential exposure to radon and its decay products as the second cause of lung cancer after tobacco consumption and also as the main risk-factor in never smokers. The high levels of radon are observed in the North and East areas of Kazakhstan because of the natural radiation sources and the long-term and large-scale mining of uranium. The genotoxic effects of radon on population of Kazakhstan are poorly understood, in spite of the fact that many regions of the country contain the high levels of radon. Studies elucidating potential health risk among population exposed to radon and genotoxic effect of radon in Kazakhstan are very limited or they have never been addressed in some areas. In this review, we are presenting available data on the residential radon exposure of humans in uranium mining and milling areas in the North and East areas of Kazakhstan.

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Biomonitoring of environmental pollution by thorium and uranium in selected regions of the Republic of Kazakhstan

Cited by 27 publications

References 25 publications

Landscape control of uranium and thorium in boreal streams – spatiotemporal variability and the role of wetlands

Landscape control of uranium and thorium in boreal streams – spatiotemporal variability and the role of wetlands

Ultrasensitive electrochemical detection of UO₂²⁺ based on DNAzyme and isothermal enzyme-free amplification

The health effects of radon and uranium on the population of Kazakhstan

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Biomonitoring of environmental pollution by thorium and uranium in selected regions of the Republic of Kazakhstan

Cited by 27 publications

References 25 publications

Landscape control of uranium and thorium in boreal streams – spatiotemporal variability and the role of wetlands

Landscape control of uranium and thorium in boreal streams – spatiotemporal variability and the role of wetlands

Ultrasensitive electrochemical detection of UO22+ based on DNAzyme and isothermal enzyme-free amplification

The health effects of radon and uranium on the population of Kazakhstan

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Ultrasensitive electrochemical detection of UO₂²⁺ based on DNAzyme and isothermal enzyme-free amplification