期刊论文

Ding, D.-X.(dingdx@nhu.edu.cn)

中文

过程工程学报

1009-606X

2008

8

5

859-865

10.3321/j.issn:1009-606X.2008.05.005

基金项目：湖南省自然科学基金资助项目（编号：06JJ2037）.

本校为第一且通讯机构

采用氧化亚铁硫杆菌作为实验菌，针对有菌有Fe~(2＋)、有菌无铁、无菌有Fe~(3＋)、无菌有Fe~(2＋)、不控制pH值的无菌无铁和pH值控制在2.0的无菌无铁6种沥青铀矿石浸出体系，考察了浸出过程中细菌的浓度、溶液pH值、电位、亚铁离子浓度、全铁离子、铀浓度等参数的变化，得到铀矿石的浸出率分别为98.00％，80.33％，97.66％，93.00％，20.33％，72.00％。结果表明，在沥青铀矿石的细菌浸出中，细菌的作用以间接作用为主，即细菌把还原态的硫或单质硫及Fe~(2＋)氧化成Fe_2（SO_4）_3。由于Fe_2（SO_4）_3是一种强氧化剂，将不溶的U（Ⅳ）氧化为可溶解的U（Ⅵ），从而使沥青铀矿石中的铀得以浸出。...

Thiobacillus ferrooxidans was used in bacteria leaching of uranium from uranmite ore leaching system with bacteria and Fe2+, the system with bacteria and without Fe2+, the system with Fe2+ and without bacteria, the system with Fe3+ and without bacteria, the system without bacteria and iron ions, and uncontrolled pH value, and the system without bacteria and iron ions, and controlled pH value of 2. The effects of pH value, redox potential (Eh), ferrous ions, total iron and uranium concentration were examined. The leaching rates for the six uraninite ore leaching systems reached 98.00%, 80.33%, ...