Jaworowski Z, Grzybowska D
Sci Total Environ. 1977 Jan;7(1):45-52. doi: 10.1016/0048-9697(77)90015-8.
Radium-226, lead-210, uranium and thorium are dispersed in the environment by fly ash emitted by coal fuelled power stations. Concentrations of these nuclides have been determined in fly ash from three power stations and in soils collected in six industrial and twenty rural regions. In industrial areas the concentrations of natural radionuclides, in a 5 cm thick surface soil layer, were found to be higher than in lower layers. With the exception of lead-210 this effect was not observed in rural soils, which contained less of radium-226, uranium and thorium. It was found that the type of coal, or combustion technology, influences the amount of radium-226 dispersed in the environment which is accessible to plants.
镭 - 226、铅 - 210、铀和钍通过燃煤发电站排放的飞灰散布于环境中。已测定了来自三座发电站的飞灰以及在六个工业区和二十个农村地区采集的土壤中这些核素的浓度。在工业区，5厘米厚的表层土壤中天然放射性核素的浓度高于下层土壤。除铅 - 210外，农村土壤中未观察到这种效应，农村土壤中镭 - 226、铀和钍的含量较少。研究发现，煤的类型或燃烧技术会影响植物可接触到的散布于环境中的镭 - 226的量。
