Radioactivity of 226Ra, 232Th and 40K in soil in Northwest part of Turkey: assessment of radiological impacts

IF 1.4 3区化学 Q4 CHEMISTRY, INORGANIC & NUCLEAR Radiochimica Acta Pub Date : 2023-12-13 DOI:10.1515/ract-2023-0219

Selin Özden

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Abstract

The surface soil samples were collected from Northwest Turkey. The activity concentrations of 226Ra, 232Th, and 40K were measured using an HPGe gamma-spectroscopy system. The activity concentrations of 226Ra, 232Th, and 40K in the soils were found to be in the range of 11.78 ± 1.12–43.89 ± 14.94, 3.19 ± 2.01–88.22 ± 0.92, 362.81 ± 5.94–829.27 ± 12.38 Bq kg−1 d.w., respectively. The Surfer program was used to obtain 3-dimensional maps of the specific activities. Radium Equivalent Activity (Raeq), Absorbed Gamma Dose Rate (D), Annual Effective Dose Equivalent (AEDE), The Excess Life Time Cancer Risk (ELCR), External (H ex) and Internal (H in) Hazard Indexes, Annual Gonadal Dose Equivalent (AGDE), and Activity Utilization Index (AUI) were calculated and compared with the recommended values. Pearson’s correlation analysis (PCA) and factor analysis (FA) were utilized to analyze the data and indicate between the radiological parameters. The analysis showed that the total radiation was mainly caused by 226Ra and 232Th.

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土耳其西北部土壤中 226Ra、232Th 和 40K 的放射性：辐射影响评估

表层土壤样本采集于土耳其西北部。利用HPGe γ -能谱系统测量了226Ra、232Th和40K的活度浓度。土壤中226Ra、232Th和40K的活性浓度分别为11.78±1.12 ~ 43.89±14.94、3.19±2.01 ~ 88.22±0.92、362.81±5.94 ~ 829.27±12.38 Bq kg−1 d.w。Surfer程序被用来获取具体活动的三维地图。计算镭当量活度(Raeq)、吸收γ剂量率(D)、年有效剂量当量(AEDE)、过量寿命癌症风险(ELCR)、外部(H ex)和内部(H in)危害指数、年度性腺剂量当量(AGDE)和活动利用指数(AUI)，并与推荐值进行比较。采用Pearson’s correlation analysis (PCA)和factor analysis (FA)对数据进行分析，并指出各放射学参数之间的关系。分析表明，总辐射主要由226Ra和232Th引起。

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