CAJ | 학술논문

以广东某铀矿的堆浸尾矿为研究对象,通过静态和动态淋浸实验,研究了雨水作用下铀尾矿中主要污染物的溶出特征和机制.结果表明,尾矿—水作用过程中有大量H+、铀( U)和硫酸根离子( SO42-)等污染物释放,静态淋浸的浸出液pH变化范围为3.3~3.71,U和SO42-的最大浓度分别为124 mg/L、5.28 g/L；动态淋浸的浸出液pH变化范围为3.34~4.08,U和SO42-的最大浓度分别为438.95 mg/L、7.9 g/L. U和SO42-的释放前期迅速,后期较缓慢.尾矿表面吸附的铀酰络合物的溶解是导致U快速释放的主要原因.
이엄동모유광적퇴침미광위연구대상,통과정태화동태림침실험,연구료우수작용하유미광중주요오염물적용출특정화궤제.결과표명,미광—수작용과정중유대량H+、유( U)화류산근리자( SO42-)등오염물석방,정태림침적침출액pH변화범위위3.3~3.71,U화SO42-적최대농도분별위124 mg/L、5.28 g/L；동태림침적침출액pH변화범위위3.34~4.08,U화SO42-적최대농도분별위438.95 mg/L、7.9 g/L. U화SO42-적석방전기신속,후기교완만.미광표면흡부적유선락합물적용해시도치U쾌속석방적주요원인.
Static and dynamic leaching experiment were conducted for the heap leaching tailings from Some Uranium Mine,Guangdong,to study the leaching characteristics of the main contaminants from uranium tailings contacted with rain. The results show that quanti-ties of H+,uranium( U) and sulfate ion ( SO4 2-) were released in the process of tailings-water interaction. In the case of static leaching experiment,the pH of leachate ranges from 3. 3 to 3. 71,the maximum concentration of U and SO42-are 124 mg/L and 5. 28 g/L re-spectively. In dynamic leaching test,the pH of leachate ranges from 3. 34 to 4. 08,the max-imum concentration of U and SO42-are 438. 95 mg/L and 7. 9 g/L respectively. The re-lease of U and SO4 2-were fast in the initial stage and then became slow. It indicates that the fast release of U is mainly due to the dissolution of uranyl complex absorbed on the tail-ings surface.