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THE CHEMICAL AND RADIOCHEMICAL CHARACTERISTIC OF WATER, SOIL AND SEDIMENT SAMPLES OF THE SHU RIVER VALLEY OF SOUTHERN KAZAKHSTAN AND ADJACENT TERRITORY OF KYRGYZSTAN
Abstract
At present paper the results of chemical and radiochemical analysis of the environmental samples collected from the Shu river valley, are shown. The samples were collected along the Shu river from Tokmak town to Shu town during the field expedition, conducted in October, 2008, and in July, 2009. The main ions and uranium decay radionuclides in water increase up to maximum concentration in Tasotkel reservoir. The biogenic elements analysis showed their typical concentration for arid zone. The water contaminations with compounds of phosphorus, silicon, ammonium and nitrate ions are also show n. The activity of uranium isotopes is lower than the values corresponding to the “The norms of radiation safety” series [1]. The uranium concentration values are changing from 7.9 to 39.2 µg l -1 (Tasotkel reservoir) along the Shu river. This is in 2.5 times higher than the WHO level (15 µg l-1) [2]. The concentrations of uranium decay radionuclides are lower than the normative levels, corresponded by “The norms of radiation safety” series. The calculated value of effective doses, received from drinking water are near limited levels. The uranium isotopes is the main dose source. For chemical characterization of soils and sediments RF A and for mineral composition of soils and sediments the RPA respectivel y were done. The main mineral determined by above methods is quartz, spars, mica, tiff and peach. The levels of uranium and thorium determined in the so il samples are high. The increa sed levels of uranium and thorium are the result of regi onal specialization of the ores, containing the radioactive elements. The concentrations of determin ed isotopes in soils are higher than the concentrations in the sediments owing to the presence of organogenic component in them.
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References4
The Radiation Safety Norms, 1999, Almaty, 2000, 80 p.
Guidelines for drinking-wa ter quality [electronic res ource]: incorporating 1st and 2nd addenda, Vol.1, Recommendations. – 3rd ed.
Matveyeva I.V., Uralbekov B.M., Abishev T.B., Alkenova G.T., Burkitbayev M.M. Chemical characteristic of na tural waters of the Shu river valley, Bulletin of al-Farabi Kazakh National University, chemical series, 2010, #2 (58), pp. 238-243.
UNSCEAR 2008 Report to the General Asse mbly with Scientific Annexes, New York, 2010, Annex B, 463 p.
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