Mandujano-García C D, Sosa M, Mantero J, Costilla R, Manjón G, García-Tenorio R
Department of Physical Engineering, DCI, University of Guanajuato, Guanajuato, Mexico; Department of Applied Physics II, ETSA, University of Seville, Seville, Spain.
Department of Physical Engineering, DCI, University of Guanajuato, Guanajuato, Mexico.
Appl Radiat Isot. 2016 Nov;117:91-95. doi: 10.1016/j.apradiso.2016.01.031. Epub 2016 Feb 2.
Salamanca is the centre of a large industrial complex associated with the production and refining of oil-derived products in the state of Guanajuato, Mexico. The city also hosts a large chemical industry, and in past years a major fertilizer industry. All of them followed NORM (naturally occurring radioactive materials) industrial activities, where either raw materials or residues enriched in natural radionuclides are handled or generated, which can have an environmental radiological impact on their environmental compartments (e.g. soils and aquatic systems). In this study, activity concentrations of radionuclides from the U and Th natural series present in superficial urban soils surrounding an industrial complex in Salamanca, México, have been determined to analyse the possible environmental radiological impact of some of the industrial activities. The alpha-particle and gamma-ray spectrometry is used for the radiometric characterization. The results revealed the presence of 10-42, 11-51 and 178-811Bq/kg of U, Th and K, respectively, without any clear anthropogenic increment in relation to the values normally found in unaffected soils. Thus, the radioactive impact of the industrial activities on the surrounding soils can be evaluated as very low, representing no radiological risk for the health of the population.
萨拉曼卡是墨西哥瓜纳华托州一个大型工业园区的中心，该园区与石油衍生产品的生产和精炼相关。这座城市还拥有大型化学工业，过去还有一家大型化肥厂。所有这些产业都涉及天然放射性物质（NORM）的工业活动，即处理或产生富含天然放射性核素的原材料或残渣，这可能会对其环境组成部分（如土壤和水生系统）产生环境放射性影响。在本研究中，测定了墨西哥萨拉曼卡一个工业园区周边城市表层土壤中天然铀系和钍系放射性核素的活度浓度，以分析某些工业活动可能产生的环境放射性影响。采用α粒子和γ射线能谱法进行辐射测量表征。结果显示，铀、钍和钾的活度浓度分别为10 - 42、11 - 51和178 - 811Bq/kg，与未受影响土壤中通常发现的值相比，没有明显的人为增加。因此，工业活动对周边土壤的放射性影响可评估为非常低，对居民健康不构成放射风险。
