Distribution of 210 Pb and 210 Po in ground water around uranium mineralized area of Jaduguda, Jharkhand, India
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Distribution of 210Pb and 210Po in ground water around uranium mineralized area of Jaduguda, Jharkhand, India D. B. Sharma1 · V. N. Jha1 · Sarjan Singh1,3 · N. K. Sethy1 · S. K. Sahoo2 · S. K. Jha2 · M. S. Kulkarni2 Received: 19 July 2020 / Accepted: 4 November 2020 © Akadémiai Kiadó, Budapest, Hungary 2020
Abstract In present study, distribution of 210Po and 210Pb in ground water in uranium mineralized zone of Jaduguda in East Singhbhum region of Jharkhand state, India is evaluated. Activity concentration of 210Po ranges from 1000 mm with three dominant seasons. During May and June significant depletion in water level in small streams is observed due to extreme summer. During the season, maximum ambient temperature around 45 °C has been observed. Duration between March to mid of June is considered normally as Pre-monsoon season, monsoon from July to mid of October while winter goes from November to February. Subernrekha is only perennial river of this region with tributaries (Gara, Shankh and Kharkai) passing through mineralized hill valleys. The detailed review of geology of this region is available elsewhere [5–8]. Uranium mineralization has taken place discontinuously along the Singhbhum copper-uranium belt concentration being more in the central part [7]. Wide variation of the radionuclide level in different environmental matrices is reported in this area [14, 15].
Sample collection Ground water samples were collected from tube wells and dug wells at nineteen locations around the study area (Fig. 1) in wide mouth preconditioned (washed with 1:1 nitric acid followed by double distilled water) polyethylene carboys. Collection of samples was based on proximity of the sampling location from the uranium mining and ore processing facility as well as the upstream and downstream side of tailings discharges. Proper care was taken to avoid contamination of samples. Before collecting the sample, carboys were repeatedly rinsed with the water from the source. Collected samples were brought to the
Journal of Radioanalytical and Nuclear Chemistry
Fig. 1 Location map of study area
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Journal of Radioanalytical and Nuclear Chemistry
laboratory and immediately filtered through 0.45-micron membrane filter (Millipore Corporation) and preserved by acidification below pH 2 using nitric acid. Liquid effluent sample from effluent channels along with boundary of tailings pond was collected and preserved following the same procedure as above. Sensitive water quality parameters such as pH, conductivity, Oxidation and Reduction Potential (ORP) and salinity were measured in field.
Sample processing For all analysis purpose chemicals and reagents of Suprapur grade (Merck KGaA, Darmstadt, Germany) or equivalent has been used. All laboratory items were cleaned with 2 M H NO 3 followed by repeated rinsing with Milli-Q water (0.05 μS cm−1) and stored in the dust free atmosphere [16]. For pre-concentration of radionuclides, Fe(III) carrier (Ammonium ferric sulfate) solution containing 5 g L −1 of Fe(III) is added to 10 L of
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