Activity concentrations of radionuclides in soil samples along the coastal areas of Kerala, India and the assessment of radiation hazard indices
- 41 Downloads
The present study was carried out along the coastal regions of Kerala, India, to evaluate the distribution of uranium, thorium and potassium concentrations in surface soil samples. A total of 92 soil samples were collected from 9 coastal districts, lying by the side of the Arabian Sea. The radium equivalent activities in the beach sands of Kollam district varies from 877 to 3715 Bq kg−1, which is higher than the reference limit of 370 Bq kg−1. Results show that the radiological parameters obtained for the beach sand from the districts of Thiruvananthapuram, Alapuzha, Eranakulam, Thrissur, Malappuram, Kozhikode, Kannur and Kasaragod are within the safe limits and hence these places can be considered as Normal Background Radiation Areas. Thus, when the high radioactive places are confined to a narrow belt in Kollam district, the other coastal areas of Kerala, especially northern and middle zones are within the safe limit with respect to radiological index.
KeywordsThorium Monazite Kerala coasts Radiological parameters Activity concentrations Radium equivalent activity
One of the authors (Ramsiya M.) acknowledges with thanks, UGC Govt. of India for MANF fellowship and for SAP facilities in the department. The technical help received from Mr. Jamshihas A P, Vishnu C V and Midhun C V are gratefully acknowledged.
The funding was provided by Ministry of Minority Affairs (Grant No. 22627).
- 1.UNSCEAR (2000) United Nations Scientific Committee on the Effects of Atomic Radiation, sources and effects of ionizing radiation, UNSCEAR 2000 report, vol 1 to the general assembly, with scientific annexes, United Nations Sales Publication, United Nations, New YorkGoogle Scholar
- 8.Sunta CM, David M, Abani MC, Basu AS, Nambi KSV (1982) Analysis of dosimetry data of high natural radioactivity areas of southwest coast of India. The natural radiation environment. Wiley Eastern Limited, New Delhi, pp 35–42Google Scholar
- 11.Shetty PK, Narayana Y (2010) Variation of radiation level and radionuclide enrichment in high background area. J Environ Radio Act 30:1–5Google Scholar
- 12.District Survey Report of Minor Minerals (2016) Prepared as per Environment Impact Assessment (EIA) notification 2006 issued under environment (protection) act 1986. Department of mining and geology. Government of Kerala, India. http://www.dmg.kerala.gov.in
- 13.Kerala Marine Fisheries Statistics (2015) Director of Fisheries, Government of Kerala, India. http://www.fisheries.kerala.gov.in/images/pdf2017/marine_2015.pdf
- 19.Aswathanarayana U (1985) Principles of nuclear geology. Oxonian Press Pvt, Ltd, New DelhiGoogle Scholar
- 20.UNSCEAR (2017) Sources, effects and risks of ionising radiation, United Nations Scientific Committee on the Effect of Atomic Radiation, report to the general assembly with scientific annexes A and BGoogle Scholar
- 21.UNSCEAR (2008) Sources and effects of ionising radiation, vol 1 United Nations Scientific Committee on the Effect of Atomic Radiation, report to the general assembly with scientific annexeGoogle Scholar
- 23.Suresh Gandi M, Ravisankar R, Rajalakshmi A, Sivakumar S, Chandrasekaran A, Anand DP (2014) Measurements of natural gamma radiation in beach sediments of north east coast of Tamilnadu, India by gamma ray spectrometry with multivariate statistical approach. J Radiat Res Appl Sci 7:7–17CrossRefGoogle Scholar