Duggal V, Rani A, Balaram V. ASSESSMENT OF AGE-DEPENDENT RADIATION DOSE DUE TO INTAKE OF URANIUM AND THORIUM IN DRINKING WATER FROM SIKAR DISTRICT, RAJASTHAN, INDIA. Radiation Protection Dosimetry. 2016 Mar 30. pii: ncw070.
The concentrations of238U and232Th have been determined in drinking water samples collected from the Sikar district of Rajasthan State, India. The samples have been analysed by using high-resolution inductively coupled plasma mass spectrometry.238U content in water samples ranged from 8.20 to 202.63 µg l-1and232Th content ranged from 0.57 to 1.46 µg l-1 The measured238U content in 25 % of the analysed samples exceeded the World Health Organization (WHO) and United States Environmental Protection Agency drinking water guidelines of 30 µg l-1and 12.5 % of the samples exceeded the 60 µg l-1Indian maximum acceptable concentration recommended by the Atomic Energy Regulatory Board, India. The annual effective doses (µSv y-1) due to ingestion of238U and232Th for different age groups were also calculated. The results compared with the recommended value reported by the WHO.