硅酸盐结构对硅酸盐细菌生长代谢及脱硅的影响  

Structural effects of silicate minerals on the growth,metabolism and desilicification of a strain of silicate bacterium

作　　者：张贤珍[1,2] 林海[1] 孙德四[2] 张敏[2] 

机构地区：[1]北京科技大学土木与环境工程学院,北京100083 [2]九江学院化学与环境工程学院,江西九江332005

出　　处：《重庆大学学报（自然科学版）》2014年第5期98-103,共6页Journal of Chongqing University

基　　金：国家自然科学基金资助项目(51064011)

摘　　要：硅酸盐矿物的结构会影响硅酸盐细菌的生长。选用一株硅酸盐细菌JG-02,观察该细菌分别在含高岭石、石英、铝土矿的培养基中生长规律,监测培养过程中的理化参数以及浸出前、后固体矿样的表面变化,来了解硅酸盐细菌对不同结构的硅酸盐矿物的作用。结果表明:该菌株在不同矿物环境中生长规律基本一致,但细菌数量、产酸、产多糖的能力差别较大,菌株在含高岭石的培养基中生长较好、产酸产多糖较多,浸出液中SiO2含量最多(40.8mg/L),而在含石英的培养基中则较少,但红外结果显示试验菌株与高岭石、石英发生了相似的作用。因此,层状结构硅酸盐矿物比架状结构的更利于JG-02的生长、侵蚀。Silicate mineral structures affect silicate bacterial grow th .A study is carried out on the grow th of a strain of silicate bacteria named JG-02 in the media containing kaolin ,quartz ,bauxite respectively by monitoring the physical and chemistry parameters ,surface changes of silicate minerals during bioleaching . The results show that the strain has the similar growth curves in different media ,but the number of bacteria , acid and polysaccharide production capacity vary greatly . The strain produces more acid , polysaccharide and maximum SiO2 （40 .8 mg/L） in kaolin medium .The quartz’s is less .However ,similar changes are shown on surfaces of kaolin and quartz by infrared ray .Therefore ,the growth of JG-02 and mineral erosion will happen more easily on the surfaces of layered silicate minerals than the frameworks .

关 键 词：硅酸盐细菌 高岭石 石英 铝土矿 生长代谢 脱硅 

分 类 号：Q939[生物学—微生物学] TD925[矿业工程—选矿]