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首页> 外文期刊>Radiation Protection and Environment >STUDY OF DISTRIBUTION OF RADIONUCLIDES IN CULTIVATED LAND IN AND AROUND CHIKMAGALUR, KARNATAKA, INDIA
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STUDY OF DISTRIBUTION OF RADIONUCLIDES IN CULTIVATED LAND IN AND AROUND CHIKMAGALUR, KARNATAKA, INDIA

机译：印度卡纳塔克邦奇克马加卢尔及其周边耕地中放射性核素的分布研究

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摘要

Cultivation of land modifies soil characteristics and influences redistribution of radionuclides in topsoil. The concentrations of ~(210)Po and ~(210)Pb in the cultivated land of Chikmagalur were measured by wet ashing silver planchet electroplating alpha count method. The concentration of ~(226)Ra was determined using Emanometry Method. The samples were precipitated by chemical processes and the concentrations of ~(228)Ra measured using high efficiency low level background gas flow beta counter. The lowest activity of ~(226)Ra, ~(228)Ra ~(210)Po and ~(210)Pb recorded at study area were 6.1, 5.6,12.9 and 20.6 Bq.Kg~(-1) and maxima were 47.7, 29.6, 71.2 and 120.5 Bq.Kg-1 and mean 13.8, 19.2, 28.6 and 1.8 Bq.Kg~(-1) respectively. The mean of ratios of ~(210)Po and ~(210)Pb in cultivated and uncultivated land were found to be 0.53 and 1.06 respectively. Concentrations of ~(226)Ra, ~(228)Ra and ~(210)Po in cultivated land found to be lower than that of undisturbed land but reverse in case of ~(210)Pb. Decrease in activities of ~(226)Ra, ~(228)Ra, and ~(210)Po in cultivated may due to wash out of 'floating fraction' with rainwater and the increase of activity of ~(210)Pb may be due to re-suspension. The 're-suspension factor' (K) increases for ~(226)Ra, ~(228)Ra, and ~(210)Po in cultivated and fertilizer added area, but not for ~(210)Pb. Also the concentrations of radionuclides were found to be high in comparison with global and Indian average.
机译：耕种土地会改变土壤特性，并影响表层土壤中放射性核素的重新分布。采用湿灰化银飞船电镀α计数法测定了Chikmagalur耕地中〜（210）Po和〜（210）Pb的浓度。使用电磁法测定〜（226）Ra的浓度。通过化学过程使样品沉淀，并使用高效低水平背景气流β计数器测量〜（228）Ra的浓度。研究区记录的最低〜（226）Ra，〜（228）Ra〜（210）Po和〜（210）Pb的活性分别为6.1、5.6、12.9和20.6 Bq.Kg〜（-1），最大值为47.7 ，29.6、71.2和120.5 Bq.Kg-1，平均分别为13.8、19.2、28.6和1.8 Bq.Kg〜（-1）。发现耕地和未耕地中〜（210）Po和〜（210）Pb之比的平均值分别为0.53和1.06。耕地中〜（226）Ra，〜（228）Ra和〜（210）Po的浓度低于未受干扰的土地，但在〜（210）Pb的情况下则相反。耕作中〜（226）Ra，〜（228）Ra和〜（210）Po的活性降低可能是由于用雨水冲走了“漂浮部分”而导致的，而〜（210）Pb的活性增加可能是由于重新暂停。在耕作和施肥区，〜（226）Ra，〜（228）Ra和〜（210）Po的“重悬浮因子”（K）增加，而〜（210）Pb则不增加。与全球和印度的平均值相比，放射性核素的浓度也很高。

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