{"title":"Radiometric properties of virgin and cultivated soil around the Shazand Refinery Complex in Iran","authors":"M. Mohebian, R. Pourimani","doi":"10.52547/IJRR.18.4.723","DOIUrl":null,"url":null,"abstract":"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 Ra, Th, K and Cs radionuclides. Results: The average concentrations of Ra, Th, K and 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. Excess lifetime cancer risk (ELCR) was obtained for cultivated (virgin) soil as 0.19 × 10 (0.22 × 10), which is close to the world average (0.29 × 10) and lowers than the maximum acceptable value (10). Conclusion: The specific activities of natural radionuclides were in the global range and are lower than the maximum allowable value. The distribution map of Ra and Cs indicated some part of 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.","PeriodicalId":14498,"journal":{"name":"Iranian Journal of Radiation Research","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"2020-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"1","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Iranian Journal of Radiation Research","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.52547/IJRR.18.4.723","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"Health Professions","Score":null,"Total":0}
引用次数: 1
Abstract
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 Ra, Th, K and Cs radionuclides. Results: The average concentrations of Ra, Th, K and 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. Excess lifetime cancer risk (ELCR) was obtained for cultivated (virgin) soil as 0.19 × 10 (0.22 × 10), which is close to the world average (0.29 × 10) and lowers than the maximum acceptable value (10). Conclusion: The specific activities of natural radionuclides were in the global range and are lower than the maximum allowable value. The distribution map of Ra and Cs indicated some part of 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.
期刊介绍:
Iranian Journal of Radiation Research (IJRR) publishes original scientific research and clinical investigations related to radiation oncology, radiation biology, and Medical and health physics. The clinical studies submitted for publication include experimental studies of combined modality treatment, especially chemoradiotherapy approaches, and relevant innovations in hyperthermia, brachytherapy, high LET irradiation, nuclear medicine, dosimetry, tumor imaging, radiation treatment planning, radiosensitizers, and radioprotectors. All manuscripts must pass stringent peer-review and only papers that are rated of high scientific quality are accepted.