期刊论文

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

中文

化工学报

0438-1157

2009

60

11

2903-2910

国家自然科学基金项目（50774047）； 湖南省自然科学基金项目（06JJ2037）~~；

本校为第一且通讯机构

为了研究沥青铀矿石的细菌浸出机理,设计了有菌有铁、有菌无铁及无菌无铁3种矿粉浸出试验及有菌无铁、无菌无铁两种试块浸出试验,检测了矿粉浸出体系中细菌的浓度、pH值、Eh、亚铁离子浓度、总铁离子浓度及铀浓度的变化,分析了浸出尾渣中O、Mg、K、P、S、Fe、U等元素的含量,观测了浸出前后试块表面形貌的变化.结果表明,在沥青铀矿石浸出过程中,嗜酸氧化亚铁硫杆菌可以高效氧化浸出体系中的亚铁、还原态硫及元素硫,使得浸出体系中的Eh升高和pH值降低;有菌有铁浸出体系中,高浓度的细菌、高浓度的铁、低pH值和高Eh可加速铀矿石的浸出和提高铀矿石的浸出率;有菌无铁浸出体系中,即使总铁离子浓度很低...

In order to study the mechanism for bacteria leaching of pitchblende, several leaching experiments were conducted, including three powder leaching experiments with bacteria and iron, with bacteria and without iron, without bacteria and iron, and two specimen leaching experiments with bacteria and without iron, without bacteria and iron. Variations in the concentrations of bacteria, ferrous ions, total iron ions and uranium ions, pH value and redox potential of the leaching solutions were monitored in the powder leaching systems. The contents of...