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Natural Radionuclides Content in Granites from Operational Quarry Sites

机译：运营采石场花岗岩中天然放射性核素含量

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Natural radionuclides content in granite from eight functional quarries in Osun State, Southwestern Nigeria w as assessed. Eighty granite samples compris e? &frac34? inches.? &frac12? inch and stone-dust were collected from Wolid, Slava, Ayofe, Espro, Ife/Modakeke, Krystal Vountein, Clario and Omidiran quarries in the State. Measurement was done using a high purity germanium (HPGe) detector. The statistical analysis was carried out using Statistical Package for Social Sciences (SPSS) software to determine if granite size has an impact on the activity concentrations. The results revealed that the mean activity concentrations of ~( 238 ) U (12.64 ± 1.89 Bq · kg ~( -1) ~( ) ) and ~( 232 ) Th (16.93 ± 2.46 Bq · kg ~( -1) ~( ) ) were highest in? &frac34? inch granite and lowest in stone-dust (5.01 ± 0.77 and 8.97 ± 1.37 Bq · kg ~( -1) respectively), whereas ~( 40 )K is highest in the &frac34? i nches (266.19 ± 35.53 Bq · kg ~( -1) ) and lowest in? &frac12 ?inches (151.85 ± 25.09 Bq · kg ~( -1) ) granite. Espro has the highest (23.75 ± 3.74 Bq · kg ~( -1) ) while Wolid has the lowest (4.11 ± 0.73 Bq · kg ~( -1) ) ~( 238 ) U activity concentration and Slava has lowest for ~( 232 ) Th (8.21 ± 1.12 Bq · kg ~( -1) ) and ~( 40 ) K (109.54 ± 11.06 Bq · kg ~( -1) ). The radiological hazard parameters such as absorbed dose, annual effective dose radium equivalent, gamma index, external index, and internal index, were calculated to assess the radiation hazards associated with granite samples. The results obtained are lower than the recommended limits. The results were compared with the published data of other countries. Although, all the calculated radiation hazard indices were lower than the permissible limits. Therefore, people working in the quarries, granite end-users and the general public are safe from radiological health risks from the quarries, since there is no significant health hazard. The research will give reliable information on activity concentrations of natural radionuclides in granite rocks, contribute to a better understanding of radioactivity distribution in granite, and develop standards.
机译：评估了尼日利亚西南部奥森州八个功能采石场花岗岩中天然放射性核素的含量。八十个花岗岩样品包括？ ＆frac34？英寸。 ＆frac12？从该州的沃利德（Wilid），斯拉瓦（Slava），阿约夫（Ayofe），埃斯佩罗（Espro），伊夫/莫达克（Ife / Modakeke），克里斯塔尔·沃恩泰因（Krystal Vountein），克拉里奥（Clario）和奥米迪兰（Omidiran）采石场收集了1英寸和几英寸的粉尘。使用高纯度锗（HPGe）检测器进行测量。使用社会科学统计软件包（SPSS）软件进行统计分析，以确定花岗岩的尺寸是否对活动浓度产生影响。结果表明，〜（238）U（12.64±1.89 Bq·kg〜（-1）〜（））和〜（232）Th（16.93±2.46 Bq·kg〜（-1）〜（ ）最高？ ＆frac34？英寸花岗岩和石粉中最低（分别为5.01±0.77和8.97±1.37 Bq·kg〜（-1）），而＆frac34？中最高（〜40）K？最低（266.19±35.53 Bq·kg〜（-1））？ ＆frac12英寸（151.85±25.09 Bq·kg〜（-1））花岗岩。埃斯佩罗（23.75±3.74 Bq·kg〜（-1））最高，而沃利德（4.11±0.73 Bq·kg〜（-1））〜（238）U活度最低，而斯拉瓦（Slava）最低（〜232） Th（8.21±1.12 Bq·kg〜（-1））和〜（40）K（109.54±11.06 Bq·kg〜（-1））。计算了放射性危害参数，例如吸收剂量，年有效剂量镭当量，γ指数，外部指数和内部指数，以评估与花岗岩样品相关的辐射危害。获得的结果低于建议的极限。将结果与其他国家/地区发布的数据进行比较。虽然，所有计算得出的辐射危害指数均低于允许的限值。因此，采石场的工作人员，花岗岩最终用户和一般公众都不会受到采石场的放射线健康危害，因为它们没有重大的健康危害。该研究将提供有关花岗岩岩石中天然放射性核素活度浓度的可靠信息，有助于更好地了解花岗岩中放射性活度分布，并制定标准。

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