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Title: Evaluation and analysis of 226Ra, 232Th and 40K and radon exhalation rate in the soil samples for health risk assessment

Authors: Sandeep Kansal; Rohit Mehra

Addresses: Department of Physics, Giani Zail Singh Punjab Technical University Campus, Bathinda 151001, Punjab, India ' Department of Physics, Dr. B.R. Ambedkar National Institute of Technology, Jalandhar 144001, Punjab, India

Abstract: The measurements of radium, thorium and potassium using gamma spectrometry and radon exhalation rates using solid-state nuclear track detectors (LR-115, Type-II plastic) are carried out in the soil samples collected from some parts of western districts of Haryana, India. The activity concentrations of 226Ra, 232Th and 40K range from 13.93 to 142 Bq kg−1, 35.95 to 91.78 Bq kg−1 and 299.57 to 1056.77 Bq kg−1, respectively. The values of total absorbed dose and annual effective dose (indoors and outdoors) were found to vary from 42.12 to 140.05 nGy h−1, 0.22 to 0.69 mSv y−1 and 0.05 to 0.17 mSv y−1 respectively. The radium equivalent activity (Raeq) in all the soil samples varies from 92.51 to 287.08 Bq kg−1 with an average of 184.15 Bq kg−1. The radium values are lower than the recommended safe limit of 370 Bq kg−1 hence there is no radiological risk to the residents of the studied area.

Keywords: gamma spectrometry; Raeq; annual effective dose; radium; thorium; potassium; radon exhalation rate; soil contamination; environmental pollution; health risk assessment; solid state nuclear track detectors; radiological risks; natural radioactivity; low radiation.

DOI: 10.1504/IJLR.2015.071747

International Journal of Low Radiation, 2015 Vol.10 No.1, pp.1 - 13

Received: 20 Jan 2014
Accepted: 14 Jan 2015

Published online: 17 Sep 2015 *

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