Pollution Research Paper

Vol. 36, Issue 4, 2017; Page No.(873-878)

AN ASSESSMENT OF INGESTION DOSE TO PUBLIC FROMPOLONIUM -210 AND LEAD- 210 VIA DIETARY SOURCES IN ANINDUSTRIAL AREA ELOOR, KERALA, INDIA

DHANYA BALAKRISHNAN, P.J. JOJO AND JOSE P. ABRAHAM

Abstract

Polonium -210 (210Po) and lead-210 (210Pb), decay products of uranium series, are of muchimportance in ingestion dose assessment because of their largest contribution to the naturalradiation dose received by many species. The activities of 210Po and 210Pb were determined in soiland vegetable samples in the Eloor Island, an industrial belt in the southern peninsular region inthe state of Kerala, with an aim of evaluating ingestion dose to critical population residing in theisland. The 210Po activity concentration was determined by radiochemical separation method followed by alpha counting using alpha scintillation counter. The 210Pb activity has beendetermined via the 210Po measurement resulting from the decay of 210Pb. In soil samples the 210Pband 210Po ranged from 8.3 to 21.1 BqKg-1 and 11.1 to 22.2 Bq Kg-1 respectively. The activityconcentration of 210Pb and 210Po in vegetable samples was found to be varied from 0.06 to 0.31 BqKg-1 and 0.10 to 0.42Bq Kg-1 respectively. Among the vegetable samples analyzed leafy vegetables(spinach) shows relatively higher activity concentration for both 210Pb and 210Po. The measurementof transfer factor shows that the uptake of 210Pb and 210Po in spinach is relatively higher than othervegetables. The annual committed effective dose to the population via 210Pb and 210Po intake wasfound to be 51.6μSv per year.

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