评估努比亚砂岩带来的潜在辐射危害,埃及,埃及
Ahmed E Abdel Gawad1, Hassan Eliwa2, Masoud S Masoud3
1Nuclear Materials Authority, P.O. Box 530, El-Maadi, Cairo, Egypt. gawadnma@gmail.com.
Scientific reports
|December 1, 2023
概括
这项研究测量了砂岩中的自然放射性,发现,和的含量低于全球安全限值. 研究得出的结论是,砂岩的使用是安全的,不会对健康造成重大风险.
科学领域:
- 地质科学 地质科学
- 环境科学 环境科学
- 放射学科学 放射学科学
背景情况:
- 在地质构成中自然存在的放射性物质 (NORM) 需要对潜在的健康影响进行评估.
- 砂岩形成可以含有不同度的放射性核酸,如 (U), (Th) 和 (K).
- 了解放射性核酸活性对于评估与建筑材料和土地使用相关的放射性风险至关重要.
研究的目的:
- 在砂岩样本中量化关键放射性核化物 (238U,232Th,40K) 的活性度.
- 评估相关的放射性危害,包括吸收剂量速率和潜在的癌症风险.
- 根据放射性水平,确定研究的砂岩在一般用途中的安全性.
主要方法:
- 使用标准技术测量了238U,232Th和40K的活性度.
- 计算了放射性参数,如吸收剂量速率 (Dair) 和年有效剂量.
- 统计分析,包括皮尔森相关性,主要组件分析 (PCA) 和等级集群分析 (HCA),用于分析放射性核素关系和放射性风险.
主要成果:
- 砂岩样本显示238U的活性度为32±13 Bq kg-1,232Th的活性度为29.6±12.2 Bq kg-1,40K的活性度为132.6±86.4 Bq kg-1.
- 这些测量的放射性核素含量低于已确定的国际安全限值.
- 计算的吸收剂量率,年有效剂量和过度终身癌症风险都低于全球平均水平,这表明辐射影响较低.
结论:
- 分析的砂岩具有与安全国际标准相当的自然放射性水平.
- 放射性风险的主要贡献者被确定为238U,232Th和40K.
- 该研究得出的结论是,砂岩的利用是安全的,因为其放射性不对人类健康构成重大威胁.
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