International Journal of Radiation Research
نشریه پرتو پژوه
Int J Radiat Res
Basic Sciences
http://ijrr.com
79
journal79
2322-3243
2345-4229
10.61186/ijrr
en
jalali
1399
7
1
gregorian
2020
10
1
18
4
online
1
fulltext
en
Radiometric properties of virgin and cultivated soil around the Shazand Refinery Complex in Iran
Medical Physics
Medical Physics
تحقيق بديع
Original Research
<div style="text-align: justify;">Background: One of the main sources of exposure to radiation is terrestrial radionuclides in the environment. These radioisotopes are present in the Earth's crust and can be increased by human activity such as mining of coal, oil, and minerals. Materials and Methods: In this study, 39 soil samples including virgin and cultivated were collected from around of the Shazand Refinery Complex(SRC) using a template and experimental method. The gamma spectrometry method was used to measure the specific activity of the <sup>226</sup>Ra, <sup>232</sup>Th, <sup>40</sup>K and <sup>137</sup>Cs radionuclides. Results: The average concentrations of <sup>226</sup>Ra, <sup>232</sup>Th, <sup>40</sup>K and <sup>137</sup>Cs in the cultivated (virgin) soil samples were 21.95 ± 0.27 (23.99 ± 0.37), 25.37 ± 0.29 (31.74 ± 0. 38), 416.72 ± 1.88 (461.09 ± 2.68) and 5.13 ± 0.08 (5.51 ± 0.14) in Bq kg<sup>-1</sup>. Excess lifetime cancer risk (ELCR) was obtained for cultivated (virgin) soil as 0.19 × 10<sup>-3</sup> (0.22 × 10<sup>-3</sup>), which is close to the world average (0.29 × 10<sup>-3</sup>) and lowers than the maximum acceptable value (10<sup>-3</sup>). Conclusion: The specific activities of natural radionuclides were in the global range and are lower than the maximum allowable value. The distribution map of <sup>226</sup>Ra and <sup>137</sup>Cs indicated some part of <sup>226</sup>Ra, distributed as fly ash from a chimney, caused by the incineration of refinery waste. The radiological parameters calculated for both types of soil were lower than the maximum admissible values, and therefore there is no radiological hazard for people living in this area.</div>
Dosage, radionuclides, radiation, soil, pollution.
723
732
http://ijrr.com/browse.php?a_code=A-10-2055-58&slc_lang=en&sid=1
M.
Mohebian
7900319475328460017379
7900319475328460017379
No
Department Department of Physics, Faculty of Science, Arak University, Arak 38156, Iran
R.
Pourimani
r-pourimani@araku.ac.ir
7900319475328460017380
7900319475328460017380
Yes
Department Department of Physics, Faculty of Science, Arak University, Arak 38156, Iran