浸铀过程中氧化硫硫杆菌的耐氟性试验研究  

Study on the Fluorine Resistance of Thiobacillus Thiooxidans in Uranium Leaching

作　　者：刘金辉[1] 吴为荣[1] 刘亚洁[1] 孙占学[1] 

机构地区：[1]东华理工大学

出　　处：《金属矿山》2009年第5期50-52,66,共4页Metal Mine

基　　金：国家高技术研究发展计划"863"项目(编号:2007AA06Z120);国家科技部国际合作项目(编号:2008DFA71760)

摘　　要：铀矿石中常含有较高的氟含量,在浸铀过程中矿石中的氟会进入菌液中。氟离子是抑制氧化硫硫杆菌生长和影响氧化硫硫杆菌产酸能力的重要因素。试验表明,当氟离子浓度小于16mg/L时,氧化硫硫杆菌4d内生长发育良好;当氟离子浓度达到30mg/L时,其生长发育时间超过15d。当菌液中氟离子浓度小于8mg/L时,对氧化硫硫杆菌产酸能力影响很小;当氟离子浓度大于16mg/L时,对氧化硫硫杆菌产酸能力影响较大。氧化硫硫杆菌的耐氟能力可以通过驯化提高,驯化后浸铀氧化硫硫杆菌适应氟浓度能力可达40mg/L。Uranium ore often has a high fluorine content, which will enter the bacteria solution during uranium leac, hing. Fluorine ions are an important factor depressing the bacteria growth and affecting the acid production ability of bacteria. The test shows that when F^- amounts below 16 mg/L, Thiobacillus Thiooxidans can grow well in four days; when F^- reaches 30 mg/L, its growth period will exceed 15 days. When F^- is below 8 mg/L in the bacteria solution, the acid production ability of bacteria will be little affected, but when F^- reaches up to 16 mg/L, it will be greatly affected. By domestication, the fluorine resistance of Thiobacillus Thiooxidans can be raised to endure a fluorine concentration of 40 mg/L in uranium leaching.

关 键 词：氧化硫硫杆菌 耐氟性 驯化 

分 类 号：X703.5[环境科学与工程—环境工程] TL212.12[核科学技术—核燃料循环与材料]