Insight into the transfer and accumulation of 210Po and 210Pb in epiphytic plants of Kundapura on the southwest coast of India
摘要
This study examines the activity levels and transfer factors of polonium (210Po) and lead (210Pb) in epiphytic plants from the coastal area of Karnataka, India. The activity levels of 210Po and 210Pb ranged from 1.66 to 10.6 Bq kg−1 and 3.91–15.82 Bq kg−1in soil, 1.71–3.75 Bq kg−1 and 3.86–7.35 Bq kg−1in mango trunk. Honeysuckle mistletoe showed wider variations in activity levels with 2.32–20.09 Bq kg−1and 6.01–26.47 Bq kg−1 for 210Po and 210Pb respectively. Mosses exhibited the highest activity levels for210Po and 210Pb with respective ranges 45.44–219.59 Bq kg−1and 111.52–306.74 Bq kg−1. The transfer factor of 210Po and 210Pb from soil to some epiphytic plants has been determined in various locations. The results have shown higher transfer factor for210Po and 210Pb for moss with range of 13.21–100.33 and 17.33–72.50 than honeysuckle mistletoe with a range of 1.36–7.25 and 0.82–6.87. The activity values, transfer factors, the ratio of 210Po and 210Pb, along with the Average Annual Committed Effective Dose values for both mango trunk and honeysuckle mistletoe samples have been computed. The estimated cancer mortality and morbidity risks ranged from