超声波对At.f菌脱除鲕状赤铁矿中磷的影响  

Effect of Ultrasonic on Leaching of Phosphorus in Oolitic Hematite with Acidithiobacillus Ferrooxidans

作　　者：王恩文[1,2] 雷绍民[1] 龚文琪[1] 

机构地区：[1]武汉理工大学资源与环境工程学院,武汉430070 [2]安顺学院资源管理与环境科学系,安顺561000

出　　处：《武汉理工大学学报》2012年第6期82-86,共5页Journal of Wuhan University of Technology

基　　金：国家科技部国际科技合作项目(2011DFR00110);国家"十一五"支撑计划(2007BAB15B01);贵州省科技厅科技基金(黔科合J字[2009]2105号);贵州省自然科学基金(黔教科20090076)

摘　　要：利用广西某温泉水样分离At.f菌并进行纯化,采用超声波诱变研究对鄂西鲕状赤铁矿磁选精矿脱磷技术。结果表明:1)超声波诱变可以提高At.f菌的活性,当超声波频率为59kHz、诱变时间为20min时,体系中Fe2+完全氧化所需时间为20min;2)超声波诱变20min后的At.f菌接种比为15%～20%时,30d铁矿的脱磷效果为85%以上;3)培养基中ρ(Fe2+)≥9g/L时,诱变后的菌株对于鲕状赤铁矿磁选精矿的脱磷率为80%以上。Strains of Acidithiobacillus ferrooxidans （At. f） were separated and purified from water samples collected from a hot spring in Guangxi province. The purified At. f was used in the leaching of phosphorous in magnetic concentrate of oolitic hematite in the west of Hubei province. The results indicate that： 1） The optimum ultrasonic rnutagenesis （59 kHz） time, to improve oxidation activity with At. f, was showed at 20 min. In this condition, the needed time of Fe2＋ complete oxidization was 20 rnin in the system; 2） The rate of phosphorus, which was leached by ultrasonic mutagenesis（59 kHz, 20 min） purified At. f ,with the range of inoculum ratio between 15% and 20%, was more than 85%; 3） With ferrous iron concentration the optimal leaching of phosphorus, from the magnetic concentrate of oolitic hematite in the west of Hubei province, the best result was more than 80% obtained with the bacteria when ρ（Fe2＋）≥9g/L.

关 键 词：超声波 诱变 嗜酸氧化亚铁硫杆菌 鲕状赤铁矿 脱除磷 

分 类 号：TF18[冶金工程—冶金物理化学]