CAJ | 학술논문

CO2+O2地浸与酸法地浸相比,具有显著的环保优势,但也会对地下水造成一定的影响,如在生产过程中可能产生SO2-4、Mn2+和其他重金属离子。本文阐述了CO2+O2地浸采铀污染物的产生机理,开展了SRB治理污染物的探索性试验。主要研究了不同pH、不同氮气压力下SRB处理还原硫酸根的效果,结果表明,pH值对SRB还原硫酸根有很大影响,当pH值为6~8时,SRB还原硫酸根的效果最好；与氮气加压条件相比,没有氮气加压的情况下,SRB还原硫酸根的效果更好；SRB能在一定的溶解氧水平下存活,并且还原硫酸根的效果更好。
CO2+O2지침여산법지침상비,구유현저적배보우세,단야회대지하수조성일정적영향,여재생산과정중가능산생SO2-4、Mn2+화기타중금속리자。본문천술료CO2+O2지침채유오염물적산생궤리,개전료SRB치리오염물적탐색성시험。주요연구료불동pH、불동담기압력하SRB처리환원류산근적효과,결과표명,pH치대SRB환원류산근유흔대영향,당pH치위6~8시,SRB환원류산근적효과최호；여담기가압조건상비,몰유담기가압적정황하,SRB환원류산근적효과경호；SRB능재일정적용해양수평하존활,병차환원류산근적효과경호。
Compared with acidic in-situ leaching,CO2 +O2 in-situ leaching exerts signifi-cant environmental advantages, but has a certain pollution on groundwater, for example, SO2-4 ,Mn2+ and other heavy metal ions may be produced in the production process. In this paper,the mechanism of pollutant generation in CO2 +O2 in-situ leaching of uranium were described,and the explorative control experiment by using SRB were performed. Treatment effect of sulphate reduction of SRB ( sulfate-reducing bacteria) in different pH and pres-sure of nitrogen were investigated. The results showed,the pH had a great effect on SRB of reducing sulfate. When pH value was at 6 ~8,SRB had the best effect for sulfate reduc-tion;compared with the situation with nitrogen pressure,SRB had the better effect for sul-fate reduction without nitrogen pressure. SRB could survive under a certain level of dis-solved oxygen,and had more effective reduction for sulfate.