Palm Date Pits

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The results of activity concentrations of the 226Ra, 232Th and40K in the Palm Date Pits samples has been presented in Table 5. In Table 5, the mean activity concentrations of 226Ra, 232Th, and 40K in Palm Date Pits samples are 5.684 ± 1.238, 2.790 ± 0.457, 181.090 ± 16.804 Bqkg-1, ranging from 1.343 ± 0.380 to 14.526 ± 3.932 Bqkg-1, 1.420 ± 0.322 to 6.379 ± 0.368 Bqkg-1 and 89.554 ± 9.621 to 252.242 ± 12.234 Bqkg-1, respectively. The high variation in activity concentrations of 226Ra, 232Th and 40K in Palm Date Pits might be explained that contents of naturally occurring radionuclides in plants depend on their precipitation and adsorption with soil particles while concentration of radionuclides in soil decreases by a leaching process. Additionally, …show more content…
Due to high permeability of soil and low absorption of radionuclides to soil particles enhance the losses rate of these radionuclides. The uptake of radionuclides by plants increases with the low radionuclide adsorption capacity to soil particles. Additionally, the behavior of radionuclides in soil depends on different biochemical processes (e.g., decomposition of organic matter changes soil property from an oxidizing to as a reducing medium). That’ reason the uptake of radionuclides from soil-to-plant is usually affected by many factors such as, physico-chemical form of radionuclide, plant species, internal translocation mechanisms within the plant, soil characteristics (pH value), isotopic-binding mechanism of soil, fertilizers (potassium or calcium nitrates, phosphate, organic), chelating agents (organic compounds), distribution of radionuclides in soil and environmental conditions [Martinez-Aguirre & Perianez, 1998; Foth,1978; Abdulaziz Alharbi & A. El-Taher, …show more content…
In Table 6, the radio-element concentrations of 226Ra, 232Th and 40K in soil samples varied from 0.647 to 1.765 ppm, 1.301 to 4.572 ppm and 0.611 to 2.262 %, respectively. The mean value of radio-element concentrations of 226Ra, 232Th and 40K were 1.020 ± 0.187 ppm, 2.533 ± 0.521 ppm and 1.050 ± 0.279 %, respectively. As low values of radio-elements concentrations of 226Ra and 232Th in soil samples might be explained the less contents of silicon dioxide (SiO2) and mafic minerals (Mavi and Akkurt, 2010; Damla, et al., 2012) whereas high values of radioelement concentrations of 40K may be due to high contents of light minerals (potash-feldspar and

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