土壤特征与室内氡浓度预测：土壤气体中的氡、土壤学、渗透率及镭-226含量
Soil features and indoor radon concentration prediction: radon in soil gas, pedology, permeability and 226Ra content.
作者信息
Lara E, Rocha Z, Santos T O, Rios F J, Oliveira A H
机构信息
Departamento de Engenharia Nuclear, Universidade Federal de Minas Gerais, Av. Pres. Antônio Carlos, 6.627-Pampulha, Belo Horizonte 31270-901, Brazil
Centro de Desenvolvimento da Tecnologia Nuclear, Comissão Nacional de Energia Nuclear, Av. Pres. Antônio Carlos, 6.627-Pampulha, Belo Horizonte 31270-901, Brazil.
出版信息
Radiat Prot Dosimetry. 2015 Nov;167(1-3):126-9. doi: 10.1093/rpd/ncv228. Epub 2015 Apr 27.
This work aims at relating some physicochemical features of soils and their use as a tool for prediction of indoor radon concentrations of the Metropolitan Region of Belo Horizonte (RMBH), Minas Gerais, Brazil. The measurements of soil gas radon concentrations were performed by using an AlphaGUARD monitor. The (226)Ra content analysis was performed by gamma spectrometry (high pure germanium) and permeabilities were performed by using the RADON-JOK permeameter. The GEORP indicator and soil radon index (RI) were also calculated. Approximately 53 % of the Perferric Red Latosols measurement site could be classified as 'high risk' (Swedish criteria). The Litholic Neosols presented the lowest radon concentration mean in soil gas. The Perferric Red Latosols presented significantly high radon concentration mean in soil gas (60.6 ± 8.7 kBq m(-3)), high indoor radon concentration, high RI, (226)Ra content and GEORP. The preliminary results may indicate an influence of iron formations present very close to the Perferric Red Latosols in the retention of uranium minerals.
这项工作旨在关联土壤的一些物理化学特征及其作为预测巴西米纳斯吉拉斯州贝洛奥里藏特大都市区（RMBH）室内氡浓度工具的用途。土壤气体中氡浓度的测量使用AlphaGUARD监测仪进行。通过伽马能谱法（高纯锗）进行镭（226）含量分析，并使用RADON-JOK渗透仪进行渗透率测定。还计算了GEORP指标和土壤氡指数（RI）。约53%的高铁红壤测量点可归类为“高风险”（瑞典标准）。石质新成土在土壤气体中的氡浓度均值最低。高铁红壤在土壤气体中的氡浓度均值显著较高（60.6±8.7 kBq m⁻³），室内氡浓度高，RI、镭（226）含量和GEORP也高。初步结果可能表明，与高铁红壤非常接近的铁建造对铀矿物的保留有影响。
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