[en] In this study, distribution coefficients of some natural radionuclides (²²⁶Ra, U, ²¹⁰Pb and ²¹⁰Po) between different types of soils in Syria and their solutions were determined. The distribution coefficients values ranged from (164-1933, 280-1722, 350-4749 and 101-117) l kg^-1 for ²²⁶Ra, U, ²¹⁰Pb and ²¹⁰Po, respectively at pH = 4.0. While, the distribution coefficients values ranged from (207-6706, 673-2397, 149-2147 and 103- 292) l kg^-1 for ²²⁶Ra, U, ²¹⁰Pb and ²¹⁰Po, respectively at pH = 5.5. In addition, the distribution coefficients values ranged from (167-1707, 126- 1239, 44-1122 and 125-1475) l kg^-1 for ²²⁶Ra, U, ²¹⁰Pb and ²¹⁰Po, respectively at pH = 7.0. Moreover, the results showed that ²¹⁰Po distribution coefficients had the maximum values at pH 7. While ²¹⁰Pb distribution coefficients had the minimum values at same pH. In addition to, U distribution coefficients had the maximum values at pH 5.5. On the other hand, the effect of soil mineral content, CEC, ECE, pH and soluble ions on the distribution coefficients were investigated. In general, the results showed that there are logarithmic relationships between studied radionuclide activity in the soil and their distribution coefficients in all soil types (R² ranged from 0.59 to 1.00 at pH 4.0). On the other hand, there were no relationships between the distribution coefficients and soil pH. (authors)