| 李紫聿,哈日巴拉,格日勒满达呼,许潇,张帅,王成国,王海玲.呼和浩特市城区表层土壤和环境辐射水平调查[J].中华放射医学与防护杂志,2017,37(6):461-465 |
| 呼和浩特市城区表层土壤和环境辐射水平调查 |
| Investigation of the surface soil and the environmental radioactivity in Huhhot city |
| 投稿时间：2017-01-13 |
| DOI：10.3760/cma.j.issn.0254-5098.2017.06.012 |
| 中文关键词: 土壤 放射性核素 剂量率 风险评估 呼和浩特市[ |
| 英文关键词:Soil Radionuclide Dose rate Risk assessment Huhhot city |
| 基金项目:内蒙古自治区自然科学基金（2013MS0816）；内蒙古自治区卫生和计划生育委员会医疗卫生科研计划项目（201301028） |
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| 中文摘要: |
| 目的 测定呼和浩特市城区表层土壤中天然和人工放射性核素比活度，测量环境放射性水平，评估其对居民产生的健康风险。方法 采用高纯锗γ能谱仪对呼和浩特市城区48个表层土壤样品进行了放射性核素的测定；用环境γ剂量率仪测量了环境辐射水平；与世界和我国土壤中放射性核素比活度平均值进行了比较，通过联合国原子辐射影响科学委员会和相关文献推荐的方法估算了居民受照剂量。结果 呼和浩特市表层土壤样品中238U、232Th、226Ra、40K和137Cs的比活度平均值分别为（29.29±12.95）、（39.33±4.34）、（29.77±3.21）、（650.49±62.21）、（1.62±1.53） Bq/kg；测量的空气吸收剂量率均值为（86.32±11.92） nGy/h，该地区居民受到室外γ辐射所致年有效剂量为79.27 μSv/年。结论 呼和浩特市表层土壤中天然放射性核素比活度和环境辐射处于正常本底水平，对居民造成的健康风险非常低。 |
| 英文摘要: |
| Objective To determine activity concentrations of natural and artificial radionuclides in the surface soils in Huhhot city,measure environmental radiation level,and evaluate risks to residents health. Methods Radionuclides in 48 surface soil samples were determined by means of the high purity germanium γ spectrometer;environmental radiation level was measured using an environment γ dose rate meter;comparison was made of average activity concentrations in soils between domestically and globally;and the radiation dose to the local residents was estimated by using the methods recommended by UNSCEAR and reported in the related literatures. Results The average values for specific activity of 238U,232Th,226Ra,40K and137Cs in the surface soil samples in Huhhot city were (29.29±12.95),(39.33±4.34),(29.77±3.21),(650.49±62.21) and (1.62±1.53) Bq/kg,respectively;the measured air absorbed dose rate was (86.32±11.92) nGy/h;the annual effective dose to local residents from outdoor γ radiation was 79.27 μSv/year. Conclusions The specific activities of radionulcides in soils and the environmental radiation in surface soil in Huhhot city were at a normal background level,with low risks to health of the local residents. |
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