Al^(3+)对浸铀混合菌活性的影响  

Effect of Aluminum (Ⅲ) on the Activity of Mixed Bacteria in Bioleaching of Uranium

作　　者：韩文艳[1,2] 郭勤[1,2] 孙占学[1,2] 刘亚洁[1,2] 史维浚[1,2] 赵志斌 

机构地区：[1]东华理工大学水资源与环境工程学院,江西南昌330013 [2]省部共建核资源与环境教育部重点实验室,江西南昌330013 [3]核工业203研究所,陕西咸阳712000

出　　处：《金属矿山》2014年第7期98-100,共3页Metal Mine

基　　金：国家高技术研究发展计划(863计划)项目(编号:2012AA061504);科技部国际合作项目(编号:2011DFR60830);东华理工大学研究生创新资金项目(编号:DHYC2014004)

摘　　要：研究认为Al3+在细菌浸铀过程中有络合氟、降低氟对浸铀负面影响的功能。为了更好地了解Al3+对浸铀混合菌生长活性的影响,对细菌生长周期和菌液氧化Fe2+的速率受Al3+浓度的影响进行了研究,并分析了离子浓度对菌液生长影响的机理。结果表明:1浸铀混合菌的活性与Al3+的浓度密切相关。当Al3+浓度小于8 g/L时,对混合菌的氧化能力和生长周期的影响很小;继续提高Al3+浓度,对混合菌氧化能力和混合菌生长周期的影响越来越显著,混合菌生长受抑制越来越明显。2Al3+浓度小于8 g/L时,混合菌表现出较强的调节代谢的能力,即通过改变或调整代谢途径,可在一定程度上适应新的环境。因此,当细菌浸铀需要利用Al3+时,其浓度不应超过8 g/L。In the process of leaching of uranium, A13 ＋ is found to form a complexation with fluorine, hence reduce the negative influence on uranium leaching. In order to better understand the influence of A13 ＋ on bacterial activity, baeteria growth cycle and oxidation rate of Fe2 ＋ influenced by the concentration of A13 ＋ and the influence mechanism of the ion concen- tration on bacterial growth are investigated. The results show that ： ①the activity of mixed bacteria is closely related to the con- centration of A13 ＋. When the concentration of A13 ＋ is less than 8 g/L, the influence of A13 ＋ on oxidation capability and growth cycle of the mixed bacteria is very small; With the concentration increasing, its influence is getting more and more significant, and inhibition of mixed bacteria growth is more and more obvious. ②When the concentration of A13 ＋ is less than 8 g/L, mixed bacteria show a stronger ability to regulate metabolism, namely by changing or adjusting the metabolie pathways to adapting to the new environment to some extent; Therefore, when usage of A13 ＋ is required for uranium bacteria leaching,its concentration should not exceed 8 g/L.

关 键 词：铝离子 细菌浸铀 混合菌 活性 Al3+ 

分 类 号：TD925.5[矿业工程—选矿]