Bister S, Birkhan J, Lüllau T, Bunka M, Solle A, Stieghorst C, Riebe B, Michel R, Walther C
Institut für Radioökologie und Strahlenschutz, Leibniz Universität Hannover, Herrenhäuser Str. 2, 30419 Hannover, Germany.
Institut für Radioökologie und Strahlenschutz, Leibniz Universität Hannover, Herrenhäuser Str. 2, 30419 Hannover, Germany.
J Environ Radioact. 2015 Jun;144:21-31. doi: 10.1016/j.jenvrad.2015.02.024. Epub 2015 Mar 17.
The Mulde River drains the former uranium mining areas in Saxony (Germany), which has led to a large-scale contamination of the river and the adjacent floodplain soils with radionuclides of the uranium decay series. The objective of the investigation is to quantify the long-term effect of former uranium mining activities on a river system. All of the investigated environmental compartments (water, sediment, soil) still reveal an impact from the former uranium mining and milling activities. The contamination of water has decreased considerably during the last 20 years due to the operation of water treatment facilities. The uranium content of the sediments decreased as well (on average by a factor of 5.6), most likely caused by displacement of contaminated material during flood events. Currently, the impact of the mining activities is most obvious in soils. For some of the plots activity concentrations of >200 Bq/kg of soil were detected for uranium-238. Alluvial soils used as grassland were found to be contaminated to a higher degree than those used as cropland.
穆尔德河流经德国萨克森州以前的铀矿区，这导致该河流及邻近洪泛区土壤受到铀衰变系列放射性核素的大规模污染。本调查的目的是量化以前的铀矿开采活动对河流系统的长期影响。所有被调查的环境介质（水、沉积物、土壤）仍显示出受到以前铀矿开采和选矿活动的影响。由于水处理设施的运行，在过去20年里水中的污染已大幅减少。沉积物中的铀含量也有所下降（平均下降了5.6倍），这很可能是洪水事件期间受污染物质发生位移所致。目前，采矿活动的影响在土壤中最为明显。对于一些地块，检测到土壤中铀-238的活度浓度>200 Bq/kg。用作草地的冲积土被发现比用作农田的冲积土污染程度更高。
