Measurement of dissolved radon concentrations in the water samples collected from selected borewells (depth ~300 ft), wells (depth ~25 ft) and overhead tanks (height ~30 ft) of Mandya city, Karnataka, India, has been carried out by using Emanometry method. The radon concentrations in the waters of borewell, well and overhead tank ranges from 1.5 ± 0.1 to 102.8 ± 5.1, 1.3 ± 0.1 to 3.8 ± 0.4 and 2.5 ± 0.2 to 9.7 ± 1.1 Bq l−1 with the mean values of 16.8, 2.5 and 6.2 Bq l−1, respectively. Majority of borewell water samples showed higher concentrations of dissolved 222Rn compared to waters of well and overhead tank. The overall mean value of dissolved radon concentration of 12.2 Bq l−1 is found to be close to the maximum contaminant level of 11 Bq l−1 suggested by US Environment Protection Agency. The physicochemical parameters like pH, TDS and conductivity were also measured, and dependence of dissolved 222Rn on these parameters has been studied. Using the mean value of dissolved radon concentration, a new attempt has been made to compute the doses imparted to different organs and tissues of the human body. Dosimetric calculations showed that stomach and small intestine receive greater doses due to dissolved radon compared to other organs.

中文翻译：

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印度卡纳塔克邦曼迪亚市水样中溶解 222RN 的辐射剂量研究

从印度卡纳塔克邦 Mandya 市的选定钻孔（深度约 300 英尺）、水井（深度约 25 英尺）和高架储罐（高度约 30 英尺）收集的水样中溶解氡浓度的测量已通过使用测压法。钻孔、井和顶置水箱水中的氡浓度范围为 1.5 ± 0.1 至 102.8 ± 5.1、1.3 ± 0.1 至 3.8 ± 0.4 和 2.5 ± 0.2 至 9.7 ± 1.1 Bq l-1，平均值为 16.8、2.5和 6.2 Bq l-1，分别。与井水和高架水箱的水相比，大多数钻孔水样显示出更高浓度的溶解 222Rn。溶解氡浓度的总体平均值为 12.2 Bq l-1，接近美国环境保护署建议的 11 Bq l-1 的最大污染物水平。pH等物理化学参数，还测量了 TDS 和电导率，并研究了溶解的 222Rn 对这些参数的依赖性。利用溶解氡浓度的平均值，人们进行了一次新的尝试来计算人体不同器官和组织的剂量。剂量学计算表明，与其他器官相比，由于溶解的氡，胃和小肠接受了更大的剂量。