矿物结构对胶质芽孢杆菌生长代谢及溶硅的影响  

Effects of Mineral Structure on Growth Metabolism and Silicon-dissolving of Bacillus Mucilaginosus

作　　者：李漪[1] 王海林[1] 孙德四[1] 

机构地区：[1]九江学院化学与环境工程学院,江西九江332005

出　　处：《非金属矿》2013年第2期16-19,共4页Non-Metallic Mines

基　　金：国家自然科学基金(51064011)

摘　　要：选用一株胶质芽孢杆菌,通过检测发酵培养液中代谢产物种类与含量、SiO2浓度、pH值、细菌数量以及分析胶质芽孢杆菌-矿物相互作用后矿物表面微观形态与结构的变化,研究该菌种在高岭土、石英与铝土矿环境中生长代谢规律及对不同矿物的分解作用机制。结果表明,该菌种在不同矿物环境中生长规律基本一致,生长周期有一定差异;铝硅酸盐矿物能显著促进与刺激该菌种生长代谢能力,其中高岭土对菌种作用最为明显;该菌种对高岭土分解效果最好,发酵15d后,浸出液中SiO2质量浓度达到41mg/L左右;高岭土与铝土矿表面微观形态与石英相比变化明显,表明矿物结构是影响硅酸盐矿物微生物分解的重要因素。A strain of silicate bacteria was chosen to carry out a study on the microbial growth metabolisms and the microbial degradation of different silicate minerals. The mechanism by which silicate bacteria decompose kaolin, quartz and bauxite was studied by measuring types and concentrations of metabolites, densities of SiO2, pH value and bacterial populations in the culturing media, and analyzed the morphologic changes and stuctures of tested minerals afer being leached by the strian. The results show that the strain has the same microbial growth curves in different minerals media. Tested aluminosilicate minerals can promote and stimulate tha ability of the microbial growth metabolism, kaolin has the most obvious effect on the microbial growth metabolism as compared with quartz and bauxite. The strain can decompose kaolin more easily than bauxite and quartz, the concentration of SiO2 in kaolin supernatant is about 41 mg/L, but is 31 and 33 mg/L respectively in quartz and bauxite supernatant after a 15 d leaching. The mineral microscopic surfaces and structures of kaolin and bauxite are more obviously changed after interaction with the strain as compared witrh that of quartz. It is concluded that the silicate bacteria can decompose silcate minerals, but the mineral stuctures effect largely on the microbial mineral decompsing ability.

关 键 词：胶质芽孢杆菌 高岭石 石英 铝土矿 生长代谢 溶硅 

分 类 号：Q939.1[生物学—微生物学] TD97[矿业工程—选矿]