期刊论文

Two-Step Process of Aspergillus Niger-Chemical Oxidation Joint Leaching of Granite Uranium Ore

中文

核化学与放射化学

0253-9950

2021

43

2

142-147

10.7538/hhx.2020.YX.2019095

国家自然科学基金资助项目（51674146）；

本校为第一机构

为了高效浸出花岗岩型铀矿石中的铀,采用黑曲霉两步法和化学氧化联合浸出,研究预培养时间、浸出时间和不同氧化剂及其用量对浸铀效果的影响。结果表明:黑曲霉两步法浸出时,采用预培养36 h的黑曲霉浸铀,浸出时间为72 h时,铀浸出率最高,为59.34%,随着预培养时间和浸出时间的延长,铀浸出率显著下降。加入MnO_(2)、NaClO_(3)和H_(2)O_(2)三种氧化剂对铀浸出率均有不同程度的提高,其中加入2.5%(与矿石质量比)的MnO_(2)时,浸铀效果最佳,铀浸出率最高可达74.09%,与未加氧化剂相比,铀浸出率提高了14.8%。

To high-efficiently recover uranium from granite-type uranium ore, a two-step process by Aspergillus niger coupling with chemical oxidants was applied to investigate the effects of pre-culture time, leaching time, oxidant type and dosage on uranium extraction. The results show that the highest uranium recovery of 59.34% is achieved in 36 hours of pre-culture and 72 hours of leaching time in the two-step process by Aspergillus niger. The uranium recovery decreases significantly with the increase of pre-culture time and leaching time. Addition of...