Department of Protection and Safety, Atomic Energy Commission of Syria, Damascus, P.O.Box 6091, Syria.
Department of Protection and Safety, Atomic Energy Commission of Syria, Damascus, P.O.Box 6091, Syria.
J Environ Radioact. 2021 Apr;229-230:106538. doi: 10.1016/j.jenvrad.2021.106538. Epub 2021 Jan 21.
Transfer factors of radium 226(Ra), lead 210(Pb), polonium 210 (Po), uranium 238 (U) and thorium 234(Th) from five different agricultural soils in Syria to coriander, parsley and mint were investigated in a pot culture experiment. Geometric means of transfer factors (TF)wereRa (0.13),Pb(0.03), Po (0.02) and U (1.76) were within worldwide values, while TF values for Th (1.35) were higher than those recorded globally. The available transfer factor (ATF) values ranged between 0.03 and 1.45, 0.33 and 3.2, 0.10 and 3.36, 1.30 and 16.2 and 1.0 and 6.95 forRa,Pb,Po, U and Th, respectively. However, it is worth mentioning that the data from pot experiments may not represent field conditions. Liquid/solid partition coefficients (K)of Ra, U, Pb and Po for55 soils representing the dominant types of soils in Syria were also determined. Geometric means of K values ranged from 280 to1200, 750 to1600, 350to 4800 and 100-120 L kg for Ra, U, Pb and Po, respectively at pH = 4.0, and from 200 to 6700, 670 to 2400, 150 to 2100 and 100 to 160Lkgat pH = 5.5, and from 370 to 790, 130 to 550, 60 to 330 and370 to 920Lkgat pH = 7.0. The effects of soil mineral content, CEC, ECE, pH and soluble ions on the K values were investigated. In general, there were logarithmic relationships between the activity concentrations in soil and the K values (R ranged from 0.59 to 1.00 at pH 4.0). There were no relationships between the K values and soil pH.
从叙利亚的五种不同农业土壤中镭 226（Ra）、铅 210（Pb）、钋 210（Po）、铀 238（U）和钍 234（Th）转移到香菜、欧芹和薄荷的转移因子在盆栽实验中进行了研究。转移因子（TF）的几何平均值为 Ra（0.13）、Pb（0.03）、Po（0.02）和 U（1.76）在全球范围内，而 Th（1.35）的 TF 值高于全球记录值。可用转移因子（ATF）值范围为 0.03 至 1.45、0.33 至 3.2、0.10 至 3.36、1.30 至 16.2 和 1.0 至 6.95，分别为 Ra、Pb、Po、U 和 Th。然而，值得一提的是，盆栽实验的数据可能无法代表田间条件。还测定了代表叙利亚主要土壤类型的 55 种土壤的 Ra、U、Pb 和 Po 的液/固分配系数（K）。K 值的几何平均值范围为 280 至 1200、750 至 1600、350 至 4800 和 100-120 L kg 用于 Ra、U、Pb 和 Po，分别在 pH = 4.0 时，以及从 200 到 6700、670 到 2400、150 到 2100 和 100 到 160 Lkg 在 pH = 5.5 时，以及从 370 到 790、130 到 550、60 到 330 和 370 到 920 Lkg 在 pH = 7.0 时。研究了土壤矿物含量、CEC、ECE、pH 和可溶性离子对 K 值的影响。一般来说，土壤中活性浓度与 K 值之间存在对数关系（在 pH 4.0 时 R 范围为 0.59 至 1.00）。K 值与土壤 pH 之间没有关系。
