Center for Atomic, Molecular Physics and Quantum Optics (CEPAMOQ), University of Douala, P.O. Box 8580, Douala, Cameroon.
Department of Nuclear Medicine and Radiobiology, Faculty of Medicine and Health Sciences, University of Sherbrooke, 3001 12th Avenue North, Sherbrooke, QC, J1H 5N4, Canada.
Environ Monit Assess. 2024 Oct 9;196(11):1038. doi: 10.1007/s10661-024-13158-0.
Radionuclide and radon levels have been investigated in soil samples and residential environments within the Mungo and Nkam Divisions of the Littoral Region. These analyses employed gamma spectrometry facilitated by a NaI (Tl) detector for soil samples, yielding average activity concentrations of Ra, Th, and K at 23.8, 72, and 105 Bq kg, respectively. Various radiological parameters were calculated to evaluate radiological hazards. Additionally, the indoor radon concentrations were quantified utilizing the CR-39 solid-state nuclear track detector (Radtrack), revealing an average concentration of 25 Bq m and an associated inhalation dose of 0.66 mSv y. Risk assessments for lung cancer attributable to indoor radon exposure incorporated models such as the Harley model. An observed moderate correlation between indoor radon levels and external Ra concentrations implies that radon intrusion indoors might be substantially influenced by the Ra present in the subjacent soil, considering the construction of residential structures directly upon these terrains.
已在滨海区芒戈和恩卡姆分区的土壤样本和居住环境中调查了放射性核素和氡水平。这些分析采用碘化钠 (Tl) 探测器辅助的伽马光谱法进行，土壤样本中 Ra、Th 和 K 的平均活度浓度分别为 23.8、72 和 105 Bq kg。还计算了各种放射性参数来评估放射性危害。此外，还利用 CR-39 固体核径迹探测器 (Radtrack) 量化了室内氡浓度，平均浓度为 25 Bq m，相应的吸入剂量为 0.66 mSv y。归因于室内氡暴露的肺癌风险评估采用了 Harley 模型等模型。室内氡水平与外部 Ra 浓度之间观察到的中度相关性表明，考虑到住宅结构直接建在这些地形上，氡可能会大量侵入室内，这可能与土壤中存在的 Ra 有很大关系。
