Assessment of natural radionuclide transfer factors and partition coefficients in some Syrian soils
| Autor: | Yasser Al-Khateeb, W. Al-Masri, M.S. Al-Masri, Yusr Amin, Hussam Khalily |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
010504 meteorology & atmospheric sciences
Health Toxicology and Mutagenesis chemistry.chemical_element Transfer Factor 010501 environmental sciences 01 natural sciences Radium Soil Radiation Monitoring Soil pH Soil Pollutants Radioactive Environmental Chemistry Waste Management and Disposal 0105 earth and related environmental sciences Polonium Radioisotopes Radionuclide Syria Transfer factor Thorium General Medicine Pollution Partition coefficient chemistry Environmental chemistry Soil water Uranium |
| Zdroj: | Journal of Environmental Radioactivity. :106538 |
| ISSN: | 0265-931X |
| DOI: | 10.1016/j.jenvrad.2021.106538 |
| Popis: | Transfer factors of radium 226(226Ra), lead 210(210Pb), polonium 210 (210Po), uranium 238 (238U) and thorium 234(234Th) 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)were226Ra (0.13),210Pb(0.03), 210Po (0.02) and 238U (1.76) were within worldwide values, while TF values for 234Th (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 for226Ra,210Pb,210Po, 238U and 234Th, respectively. However, it is worth mentioning that the data from pot experiments may not represent field conditions. Liquid/solid partition coefficients (Kd)of 226Ra, U, 210Pb and 210Po for55 soils representing the dominant types of soils in Syria were also determined. Geometric means of Kd values ranged from 280 to1200, 750 to1600, 350to 4800 and 100–120 L kg−1 for 226Ra, 238U, 210Pb and 210Po, respectively at pH = 4.0, and from 200 to 6700, 670 to 2400, 150 to 2100 and 100 to 160Lkg−1at pH = 5.5, and from 370 to 790, 130 to 550, 60 to 330 and370 to 920Lkg−1at pH = 7.0. The effects of soil mineral content, CEC, ECE, pH and soluble ions on the Kd values were investigated. In general, there were logarithmic relationships between the activity concentrations in soil and the Kd values (R2 ranged from 0.59 to 1.00 at pH 4.0). There were no relationships between the Kd values and soil pH. |
| Databáze: | OpenAIRE |
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