Chau Nguyen Dinh, Chruściel Edward
Faculty of Physics and Applied Computer Science, AGH University of Science and Technology, Al. Mickiewicza 30, 30-059 Kraków, Poland.
Appl Radiat Isot. 2007 Aug;65(8):968-74. doi: 10.1016/j.apradiso.2007.03.009. Epub 2007 Mar 27.
A form of waste associated with mining activities is related to the type of deposit being mined and to the procedure of exploitation and enrichment adopted. The wastes usually contain relatively large amounts of technologically enhanced naturally occurring radioactive materials (TENORM). The TENORM are often stored on the surface. Consequently, they can be leached as a result of interaction with aqueous solutions of different chemical composition. This further leads to pollution of water and soil in the vicinity of the stored wastes. The paper presents the results of laboratory investigation aimed at quantifying the leaching process of samples originating from uranium dumps and storage reservoirs associated with brine pumped from coal mines. The leaching process was investigated with respect to selected elements: uranium isotopes, radium isotopes, iron, barium and sodium. The samples were exposed to aqueous solutions of different chemical composition. The experiments revealed that TENORM in form of sulphate compounds are the most resistant against leaching. The leaching coefficient for radium isotopes varies from a few thousandth percent to a few hundredth percent. On the other hand, for TENORM occurring in sand or sludge, the leaching coefficient for uranium and radium isotopes ranged from a few hundredth percent to a few percent.
与采矿活动相关的一种废物形式与所开采矿床的类型以及所采用的开采和富集程序有关。这些废物通常含有相对大量的技术增强型天然放射性物质（TENORM）。TENORM 常常存储在地表。因此，它们可能会因与不同化学成分的水溶液相互作用而被淋滤。这进而导致存储废物附近的水和土壤受到污染。本文介绍了旨在量化源自铀矿废料堆以及与煤矿抽取的卤水相关的存储库的样品淋滤过程的实验室研究结果。针对选定元素：铀同位素、镭同位素、铁、钡和钠，对淋滤过程进行了研究。使样品接触不同化学成分的水溶液。实验表明，硫酸盐化合物形式的 TENORM 对淋滤的抗性最强。镭同位素的淋滤系数从千分之几到百分之几不等。另一方面，对于存在于沙子或淤泥中的 TENORM，铀和镭同位素的淋滤系数范围从百分之几到百分之几。
