Abstract
Mumbai Harbour Bay (MHB) is a recipient of low level treated effluents from BARC, Trombay and its also a recipient of domestic and industrial wastes from the city of Mumbai and adjoining areas. Sediment samples were collected from various locations of MHB to determine the concentrations of naturally occurring radionuclides like 226Ra, 228Ra and 40K which varied between 4.0 and 26.0, 5.5 and 19.9, 249.6 and 557.6 Bq kg −1(dry) respectively and are comparable to the worldwide average concentration. The mean value ratio of 228Ra/226Ra in sediment was found to be 1.4, indicating a relatively higher mobility of 238U compared to 232Th. The concentration of anthropogenic radionuclide 137Cs in sediment and biota ranged between 3.6 and 54.5 Bq kg −1(dry) , <0.08 and 0.5 Bq kg −1(wet) respectively. The ingestion dose to ‘General Public’ due to 137Cs intake is 0.02 μSv years−1 which is negligible compared to the internationally accepted limit of 1,000 μSv years−1 to ‘members of public’.
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Acknowledgments
The authors gratefully acknowledge the guidance and encouragement given throughout the work by Dr.D.N.Sharma, Director, Health, Safety and Environment Group, BARC and also to Dr.R.M.Tripathi, Head, HPD.
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Sugandhi, S., Joshi, V.M. & Ravi, P.M. Studies on natural and anthropogenic radionuclides in sediment and biota of Mumbai Harbour Bay. J Radioanal Nucl Chem 300, 67–70 (2014). https://doi.org/10.1007/s10967-014-2944-1
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DOI: https://doi.org/10.1007/s10967-014-2944-1