不同质地土壤中天然放射性核素的土壤-大豆转移因子及有效剂量估算。

SOIL-SOYBEAN TRANSFER FACTOR OF NATURAL RADIONUCLIDES IN DIFFERENT SOIL TEXTURES AND THE ASSESSMENT OF COMMITTED EFFECTIVE DOSE.

机构信息

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.

出版信息

Radiat Prot Dosimetry. 2020 Jul 2;188(4):529-535. doi: 10.1093/rpd/ncaa005.

DOI:10.1093/rpd/ncaa005

PMID:32052836

Abstract

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.

摘要

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。