SRB治理地浸采铀矿山污染地下水条件试验研究

Experimental Study on Condition of Manage Polluted Groundwater in an In-Situ Leaching Uranium Mine by Using SRB

地浸采铀过程中,由于溶浸剂的注入,改变了地下水的原始地球化学环境,使得地下水中铀及重金属离子的浓度增高,造成了地下水的污染。通过室内试验,参照污染地下水化学成分,研究了pH值对硫酸盐还原菌(SRB)还原SO42-的影响以及SRB对U、Mn2+、Zn2+、Pb2+、Fe2+等的去除效果。结果表明,溶液pH值对SRB还原SO42-的能力以及SRB去除U、Mn2+、Zn2+、Pb2+、Fe2+等的效果影响很大,当pH值为8时,SO42-还原能力和U、Mn2+、Zn2+、Pb2+、Fe2+的去除效果均达到最佳,为地浸采铀矿山污染地下水的治理提供了新的思路。

In the process of in-situ leaching of uranium, because of the injection of leaching agent, the primitive geochemical environment of groundwater is changed, the concentration of uranium and heavy metal ions in groundwater are increased, which cause the pollution of groundwater. The research is done on effect of pH on the reduction results of SO4^2- by sulfate reducing bacteria （ SRB ） and removal effect of SRB to U,Mn^2＋ 、Zn^2＋ 、Pb^2＋ ,Fe^2＋ and so on through indoor test and refer to the chemical composition of polluted groundwater. The result shows that, The influence of ability of solution ph value to SRB reduce sulfate ion and effect of remove U,Mn^2＋ ,Zn^2＋ ,Pb^2＋ ,Fe^2＋ and so on by SRB are big, the reducing capacity of SO4^2- and removal effect of U,Mn^2＋ ,Zn^2＋,Pb^2＋ ,Fe^2＋ are the highest when pH value is 8, provides a new approach for management of polluted groundwater of in-situ leaching uranium mine.