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德国东南部的铀矿开采活动是造成环境污染的主要原因。矿山关闭和随后矿山水位升高可导致含重金属和放射性核素的矿山水渗进可利用的含水层。虽然现有一些按预定时间对矿山进行淹没(地质)的技术,但这种过程必须不造成金属释放的加剧。目前的研究只调查“自然”的地球化学状态而未考虑将来开采金属释放的不同景观。结论表明,快速淹没,虽然能够避免水的不必要的充气,但将造成还原条件以及随后铀的低溶解度。接着,具有波动水位的缓慢淹没过程,将更加导致强烈的黄铁矿氧化,高的铀溶解度和铀迁移随之发生。
Uranium mining in southeastern Germany is the main cause of environmental pollution. Mine shutdowns and subsequent mine water levels can lead to mine water containing heavy metals and radionuclides seeping into available aquifers. Although there are some techniques for submerging (geologic) mines by scheduled time, this process must not result in an increase in metal release. The current study only investigates the “natural” geochemical state without considering the different landscapes from which metals are released in the future. The conclusion shows that rapid submergence, while avoiding unnecessary aeration of water, will result in reducing conditions and subsequent low solubility of uranium. Then, a slow submergence process with fluctuating water levels will result in more intense pyrite oxidation, higher uranium solubility and uranium migration.