Abstract
The present study discusses the seasonal variation of 210Po and 210Pb in the soil and sediment of Hemavathi River Environment. The samples were collected in pre-monsoon and monsoon seasons and the concentration of210Po and 210Pb was determined using standard radiochemical analytical method. The mean activity concentration of 210Pb in soil was found to be 12.19 Bq kg-1 and 5.41Bq kg-1 in monsoon and pre-monsoon respectively. The mean activity concentration of 210Pb in sediment was found to be 12.87 Bq kg-1 and 6.17 Bq kg-1 in monsoon and pre-monsoon respectively. The mean activity concentration of 210Po in soil is 7.18 Bq kg-1. The mean activity concentration ratio between 210Po and 210Pb in soil and sediment is 1.54 and 0.66 respectively. The activity was high in monsoon as compared to the pre-monsoon. The mean activity in monsoon was higher than pre-monsoon in both soil and sediment. A good correlation observed between organic matter and the activity concentration of 210Pb in soil and sediment of both the seasons. 210Pb was increased with increase organic matter and clay, moisture also influence to increase the activity concentration.
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