Preliminary results of spatial distribution of uranium and thorium in soil profi les near a uranium industrial site, Guangdong province, China

• Autorzy: Wang J. , Liu J. , Chen Y. , Song G. , Chen D. , Xiao T. , Li H. , Wang C. , Jiang F.

Identyfikatory

DOI

10.1515/nuka-2016-0061

• Konferencja: International Conference „Radon in the Environment” (2nd ; 25-29.05.2015 ; Kraków, Poland)
• Języki publikacji: EN

Abstrakty

EN

Four soil profiles were collected from locations with different distances (5, 50, 250 and 1000 m) from a uranium mill tailings dam, Guangdong province, China, to investigate the pollution status of the soil in mining/ milling-related areas based on the contents of uranium (U) and thorium (Th), thus to understand the impacts of uranium industrial activities to the surroundings. The U and Th concentrations were determined by inductively coupled plasma mass spectrometry (ICP-MS) after conventional HF-HNO3-HClO4 digestion procedures. The results indicate that the soils within 50 m from uranium tailing were severely contaminated; those in 250 and 1000 m soil samples were observed to be with local background level even though these in 250 m had slightly higher U/Th ratios. Uranium concentrations varied from 5.50 ± 0.27 to 160.55 ± 8.03 mg/kg, with maximum values recorded in an intermediate layer of the 5-m distance soil profile. In comparison, the concentration of Th ranged from 6.02 ± 0.30 to 84.71 ± 4.24 mg/kg, with maximum values observed in the top layer of the 1000-m distance soil profile. The U/Th ratio varied from 0.15 to 11.99 compared with 0.20, 0.22 and 0.26 of the average for Guangdong province, national China and the world, respectively. The mean U/Th of four soil profiles showed a reduction with distance from the uranium mill tailing dam, suggesting the relatively large magnitude of uranium elevation in soils within limited distances.

Słowa kluczowe

EN

spatial distribution; thorium; uranium; U/Th ratio

• Wydawca: Institute of Nuclear Chemistry and Technology
• Czasopismo: Nukleonika
• Rocznik: 2016
• Tom: Vol. 61, No. 3
• Strony: 367--371
• Opis fizyczny: Bibliogr. 18 poz., rys.

Twórcy

autor

Wang J.

• School of Environmental Science and Engineering, Guangzhou University and Guangdong Provincial Key Laboratory of Radionuclides Pollution Control and Resources, 230 Waihuan West Str., 510006 Guangzhou, China

autor

Liu J.

• Innovation Center and Key Laboratory of Waters Safety & Protection in the Pearl River Delta, Ministry of Education, Guangzhou University, 230 Waihuan West Str., 510006 Guangzhou, China, Tel.: [phone], Fax: [phone]

autor

Chen Y.

• Innovation Center and Key Laboratory of Waters Safety & Protection in the Pearl River Delta, Ministry of Education, Guangzhou University, 230 Waihuan West Str., 510006 Guangzhou, China, Tel.: [phone], Fax: [phone]

autor

Song G.

• School of Environmental Science and Engineering, Guangzhou University and Guangdong Provincial Key Laboratory of Radionuclides Pollution Control and Resources, 230 Waihuan West Str., 510006 Guangzhou, China

autor

Chen D.

• School of Environmental Science and Engineering, Guangzhou University and Guangdong Provincial Key Laboratory of Radionuclides Pollution Control and Resources, 230 Waihuan West Str., 510006 Guangzhou, China

autor

Xiao T.

• State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, 99 Lincheng West Str., 550081 Guiyang, China

autor

Li H.

• Innovation Center and Key Laboratory of Waters Safety & Protection in the Pearl River Delta, Ministry of Education, Guangzhou University, 230 Waihuan West Str., 510006 Guangzhou, China, Tel.: [phone], Fax: [phone]

autor

Wang C.

• Guangdong Provincial Academy of Environmental Science, 335 Middle Dongfeng Str., 510045 Guangzhou, China

autor

Jiang F.

• School of Environmental Science and Engineering, Guangzhou University and Guangdong Provincial Key Laboratory of Radionuclides Pollution Control and Resources, 230 Waihuan West Str., 510006 Guangzhou, China

Bibliografia

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Uwagi

PL

Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę.