Physics Department, College of Science, Jouf University, P.O. 2014, Sakaka, Saudi Arabia.
Department of Physics, Faculty of Science, Al-Azher University, Assiut Branch, 71524 Assiut, Egypt.
Radiat Prot Dosimetry. 2020 Jul 2;188(4):529-535. doi: 10.1093/rpd/ncaa005.
From three different soil textures (clay, silt and sand), 36 soil and soybeans samples were accumulated from the agricultural area of EL-Mynia governorate in Upper Egypt, between (27°36'19.44″N; 30°30'14.14″ E) and (28°48'28.45″ N; 31°00'32.27″ E). Soil textures were prepared by particle size distribution through a pipette method. Its radioactivity measurements were performed with a NaI (Tl) and 3 × 3 inch crystal. The transfer factor (TF) of natural radionuclides from soil to soybeans was calculated. The value of the TF for 226Ra in clay soil ranges from 0.27 ± 0.03 to 0.42 ± 0.05, in sandy soil it ranges from 0.21 ± 0.02 to 0.57 ± 0.07 and in silt soil it ranges from 0.25 ± 0.03 to 0.53 ± 0.06. The TF for 232Th in clay soil ranges from 0.22 ± 0.03 to 0.90 ± 0.12, in sandy soil it ranges from 0.21 ± 0.03 to 1.00 ± 0.13, while in silt soil it ranges from 0.25 ± 0.03 to 0.88 ± 0.12. The TF for 40K in clay soil ranges from 0.95 ± 0.13 to 2.05 ± 0.29, in sandy soil it ranges from 1.21 ± 0.17 to 2.52 ± 0.35 and in silt soil it ranges and from 1.01 ± 0.14 to 1.46 ± 0.26.The results show that the committed effective dose from soybean consumption is between 54.5 and 103.4 μSv y-1 assuming consumption of 20 kg y-1.
从三种不同的土壤质地（粘土、粉土和沙子）中，在埃及上埃及的迈尼阿省农业区收集了 36 个土壤和大豆样本，该地区位于（27°36'19.44″N; 30°30'14.14″ E）和（28°48'28.45″ N; 31°00'32.27″ E）之间。通过吸管法通过粒径分布来制备土壤质地。使用 NaI（Tl）和 3×3 英寸晶体对其放射性进行了测量。计算了天然放射性核素从土壤到大豆的转移因子（TF）。粘土土壤中 226Ra 的 TF 值范围为 0.27±0.03 至 0.42±0.05，沙质土壤中 226Ra 的 TF 值范围为 0.21±0.02 至 0.57±0.07，粉土土壤中 226Ra 的 TF 值范围为 0.25±0.03 至 0.53±0.06。粘土土壤中 232Th 的 TF 值范围为 0.22±0.03 至 0.90±0.12，沙质土壤中 232Th 的 TF 值范围为 0.21±0.03 至 1.00±0.13，而粉土土壤中 232Th 的 TF 值范围为 0.25±0.03 至 0.88±0.12。粘土土壤中 40K 的 TF 值范围为 0.95±0.13 至 2.05±0.29，沙质土壤中 40K 的 TF 值范围为 1.21±0.17 至 2.52±0.35，粉土土壤中 40K 的 TF 值范围为 1.01±0.14 至 1.46±0.26。结果表明，假设食用 20 公斤/年，从大豆消费中获得的承诺有效剂量在 54.5 至 103.4μSv·y-1 之间。
