Department of Studies in Physics, University of Mysore, Manasagangotri, Mysuru 570 006, India.
Radiat Prot Dosimetry. 2024 Jul 17;200(11-12):1052-1058. doi: 10.1093/rpd/ncae035.
Groundwater is in direct contact with the soil and rocks that dissolve many compounds and minerals including uranium and its daughter products. 210Po is one of the decay products of 238U series that cause internal radiation dose in humans when consumed in the form of water and food, including sea food. Therefore, activities of 210Po have been studied in ground and surface water, and in food samples that are commonly used in Chamarajanagar region of Karnataka, India. The average 210Po concentration in bore well water samples and surface water samples are 3.21 and 1.85 mBq L-1, respectively. In raw rice and wheat, the average values of 210Po are 96 and 41 mBq kg-1, respectively. In millets and pulses, the average activity of 210Po is 157 and 79 mBq kg-1, respectively. Among food items, the highest activity of 1.3 kBq kg-1 is observed in marine crabs and the lowest activity of 2.6 mBq kg-1 is found in milk samples. The average ingestion dose due to 210Po in ground and surface water are 2.8 and 1.62 μSv y-1, respectively. The ingestion dose due to various food samples to the population is also calculated. Total ingestion dose due to 210Po to pure vegetarian population and general population are 38.09 and 590.80 μSv y-1, respectively. The concentration of 210Po in water samples and food samples of this region are in a comparable range with the world and Indian average values and lies well below the recommended guideline level.
地下水与溶解了许多化合物和矿物质的土壤和岩石直接接触，包括铀及其子体产物。210Po 是 238U 系列的衰变产物之一，当以水和食物（包括海鲜）的形式被人体摄入时，会导致内辐射剂量。因此，人们研究了印度卡纳塔克邦恰拉贾纳加尔地区的地下水和地表水以及常见食物样本中的 210Po 活度。 钻孔井水样本和地表水样本中的 210Po 平均浓度分别为 3.21 和 1.85 mBq L-1。在糙米和小麦中，210Po 的平均含量分别为 96 和 41 mBq kg-1。在小米和豆类中，210Po 的平均活度分别为 157 和 79 mBq kg-1。在食物中，海洋蟹的 210Po 活度最高，为 1.3 kBq kg-1，牛奶样本的 210Po 活度最低，为 2.6 mBq kg-1。 由于 210Po，地下水和地表水的年摄入量分别为 2.8 和 1.62 μSv y-1。还计算了来自各种食物样本的摄入量。纯素食人群和一般人群因 210Po 摄入的总摄入量分别为 38.09 和 590.80 μSv y-1。该地区水样本和食物样本中的 210Po 浓度与世界和印度平均值相当，远低于推荐的指导值水平。
